Spaces:

NYSERDA-CRE-Working-Group
/

Code_compliance_Check

Sleeping

App Files Files Community

Code_compliance_Check / Text /034.txt

Ryan2219

Upload 3258 files

838b84c verified about 2 months ago

raw

history blame contribute delete

130 kB

	‡‡‡ Chapter 10 was amended by
	Local Law
	77
	of 2023
	. This law has an effective
	date of June 10, 2023.
	CHAPTER 10
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	SECTION MC 1001
	GENERAL
	1001.1 Scope.
	This chapter
	shall establish the minimum safety requirements for and
	shall govern the installation,
	alteration and repair of boilers, wate
	r heaters and pressure vessels.
	Exceptions:
	1.
	Pressure vessels used for unheated water supply.
	2.
	Portable unfired pressure vessels and Interstate
	Commerce
	Commission containers.
	3.
	Containers for bulk oxygen and medical gas.
	4.
	Unfired pressure
	vessels having a volume of 5 cubic feet (0.14 m
	3
	) or less operating at pressures not exceed-
	ing 250 pounds per square inch (psi) (1723.7 kPa) and located within occupancies of Groups B, F, H, M, R,
	S and U.
	5.
	Pressure vessels used in refrigeration systems
	that are regulated by Chapter 11.
	6.
	Pressure tanks used in conjunction with coaxial cables, telephone cables, power cables and other
	similar
	humidity control systems.
	7.
	Any boiler or pressure vessel subject to inspection by federal inspectors.
	1001.2 The
	rmal safety (spill) switches.
	Thermal safety (spill) switches shall be installed in accordance with Section
	801.23.3.
	1001.3 Clearances.
	Minimum clearances at
	boilers, water heaters and pressure vessels shall be maintained in accord-
	ance with Chapter 3.
	SEC
	TION MC 1002
	WATER HEATERS
	1002.1 General.
	Potable water heaters and hot water storage tanks shall be listed and labeled and installed in accord-
	ance with the manufacturer’s instructions, the
	New York City
	Plumbing Code
	and this code. All water heaters shal
	l be
	capable of being removed without first removing a permanent portion of the building structure. The potable water
	connections
	and relief valves for all water heaters shall conform to the requirements of the
	New York City
	Plumbing
	Code
	. Domestic electric water heaters shall comply with UL 174 or UL 1453. Commercial electric water heaters shall
	comply with UL 1453. Oil
	-
	fired water heaters shall comply with UL 732. Approval for oil
	-
	fired water heaters
	350,000
	Btu/h input (103 kW) and above shall be obtained from the New York City Department of Environmental Protection.
	Thermal solar water heaters shall comply with UL 174 or UL 1453, and Chapter 14 of this code. Heat pump water
	heaters shall comply with UL 174 or UL 1995.
	1002.2 Water heaters utilized for s
	pace heating.
	Water heaters utilized both to supply potable hot water and provide
	hot water for space
	-
	heating applications shall be listed and labeled for such applications by the manufacturer and shall
	be
	built in accordance with Section IV of the
	ASME
	Boiler and Pressure Vessel Code
	with an “H” code stamp. Water
	heaters shall be
	installed in accordance with the manufacturer’s instructions
	, the
	ASME Boiler and Pressure Vessel
	Code
	and the
	New York City
	Plumbing Code.
	Oil
	-
	fired heaters shall comply with U
	L 732 and shall have an “HW”
	stamp.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1002.2.1 Sizing.
	Water heaters utilized for both potable water heating and space
	-
	heating applications shall be sized
	to prevent the space
	-
	heating load from diminishing the required potable water
	-
	heating capacity.
	1002.2.
	2 Temperature limitation.
	Where a combination potable water
	-
	heating and space
	-
	heating system requires
	water for space heating, a temperature
	actuated mixing valve complying with ASSE 1017 shall be provided to
	temper the water supplied to the potable hot wa
	ter distribution system in accordance with Section 607 of the
	New
	York City Plumbing Code
	.
	1002.2.3 Cross
	-
	connection.
	Water heaters utilized for both potable hot water and hot water for space
	-
	heating
	applications shall have separate heating sections and co
	nnections for distribution systems and shall not be cross
	-
	connected. The potability of the domestic water shall be maintained throughout the system in accordance with the
	New York City Plumbing Code.
	1002.3 Supplemental water
	-
	heating devices.
	Potable
	water
	-
	heating devices that utilize refrigerant
	-
	to
	-
	water heat
	exchangers shall be approved and installed in accordance with the
	New York City
	Plumbing Code
	, the applicable
	provisions of the
	New York City Energy Conservation Code
	and the manufacturer’s
	instructions.
	SECTION MC 1003
	PRESSURE VESSELS
	1003.1 General.
	All pressure vessels shall be constructed and certified in accordance with the
	ASME Boiler and
	Pressure Vessel Code
	, and shall
	bear the label of an approved agency. Pressure vessels shall
	be in
	stalled in accordance
	with the manufacturer’s
	instructions and nationally recognized standards. Directly fired pressure vessels shall meet
	the requirements of Section 1004.
	1003.2 Piping.
	All piping materials, fittings, joints,
	connections
	and devices asso
	ciated with systems utilized in
	con-
	junction
	with pressure vessels shall be designed for the specific application and shall
	comply with the
	ASME Boiler
	and Pressure Vessel Code
	and this code
	.
	1003.3 Welding.
	Welding on pressure vessels shall be performed by
	welders
	certified in
	compliance with nationally
	recognized standards, including the
	National Board Inspection Code
	and
	ASME Boiler and Pressure Vessel Code
	,
	Section
	IX. Such welders shall also comply with 12 NYCRR 4
	-
	6.2, and 12 NYCRR 14
	-
	3.3 through 14
	-
	3.1
	8.
	SECTION
	MC
	1004
	BOILERS
	1004.1 Standards.
	Boilers shall be designed, constructed and certified in accordance with the
	ASME Boiler and Pres-
	sure Vessel Code
	, Section I or IV, and 12 NYCRR Parts 4 and 14. Controls and safety devices for boilers with
	fuel
	input ratings of 12,500,000 Btu/h (3663 kW) or less shall meet the requirements of ASME CSD
	-
	1. Controls and safety
	devices for boilers with inputs greater than 12,500,000 Btu/h (3663 kW) shall meet the requirements of NFPA 85.
	Packaged oil
	-
	fired boile
	rs shall be listed and labeled in accordance with UL 726. Packaged electric boilers shall be
	listed and labeled in accordance with UL 834.
	Approval for oil
	-
	fired boilers 350,000 Btu/h input (102.6 kW) and
	above shall be obtained from the New York City Depa
	rtment of Environmental Protection.
	1004.1.1 Field erected boilers requirements.
	Field erected boiler installations shall comply with the following
	:
	1.
	The vessel erector shall hold the appropriate ASME stamp for vessel construction.
	2.
	The licensed instal
	ler is responsible for the installation of all controls and burners which shall be designed
	and constructed in accordance with the requirements of ASME CSD
	-
	1 and, as applicable, the
	ASME Boiler
	and Pressure Vessel Code
	, 12 NYCRR Parts 4 and 14, and NFPA 85
	.
	3.
	The New York City Department of Environmental Protection shall approve the installation of the boiler and
	burner for compatibility, controls and safety devices.
	4.
	Boiler vessels shall comply with one of the following listings:
	4.1.
	UL 726 or UL 795 a
	s applicable; or
	‡‡‡ Chapter 10 was amended by
	Local Law
	77
	of 2023
	. This law has an effective
	date of June 10, 2023.
	CHAPTER 10
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	SECTION MC 1001
	GENERAL
	1001.1 Scope.
	This chapter
	shall establish the minimum safety requirements for and
	shall govern the installation,
	alteration and repair of boilers, wate
	r heaters and pressure vessels.
	Exceptions:
	1.
	Pressure vessels used for unheated water supply.
	2.
	Portable unfired pressure vessels and Interstate
	Commerce
	Commission containers.
	3.
	Containers for bulk oxygen and medical gas.
	4.
	Unfired pressure
	vessels having a volume of 5 cubic feet (0.14 m
	3
	) or less operating at pressures not exceed-
	ing 250 pounds per square inch (psi) (1723.7 kPa) and located within occupancies of Groups B, F, H, M, R,
	S and U.
	5.
	Pressure vessels used in refrigeration systems
	that are regulated by Chapter 11.
	6.
	Pressure tanks used in conjunction with coaxial cables, telephone cables, power cables and other
	similar
	humidity control systems.
	7.
	Any boiler or pressure vessel subject to inspection by federal inspectors.
	1001.2 The
	rmal safety (spill) switches.
	Thermal safety (spill) switches shall be installed in accordance with Section
	801.23.3.
	1001.3 Clearances.
	Minimum clearances at
	boilers, water heaters and pressure vessels shall be maintained in accord-
	ance with Chapter 3.
	SEC
	TION MC 1002
	WATER HEATERS
	1002.1 General.
	Potable water heaters and hot water storage tanks shall be listed and labeled and installed in accord-
	ance with the manufacturer’s instructions, the
	New York City
	Plumbing Code
	and this code. All water heaters shal
	l be
	capable of being removed without first removing a permanent portion of the building structure. The potable water
	connections
	and relief valves for all water heaters shall conform to the requirements of the
	New York City
	Plumbing
	Code
	. Domestic electric water heaters shall comply with UL 174 or UL 1453. Commercial electric water heaters shall
	comply with UL 1453. Oil
	-
	fired water heaters shall comply with UL 732. Approval for oil
	-
	fired water heaters
	350,000
	Btu/h input (103 kW) and above shall be obtained from the New York City Department of Environmental Protection.
	Thermal solar water heaters shall comply with UL 174 or UL 1453, and Chapter 14 of this code. Heat pump water
	heaters shall comply with UL 174 or UL 1995.
	1002.2 Water heaters utilized for s
	pace heating.
	Water heaters utilized both to supply potable hot water and provide
	hot water for space
	-
	heating applications shall be listed and labeled for such applications by the manufacturer and shall
	be
	built in accordance with Section IV of the
	ASME
	Boiler and Pressure Vessel Code
	with an “H” code stamp. Water
	heaters shall be
	installed in accordance with the manufacturer’s instructions
	, the
	ASME Boiler and Pressure Vessel
	Code
	and the
	New York City
	Plumbing Code.
	Oil
	-
	fired heaters shall comply with U
	L 732 and shall have an “HW”
	stamp.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1002.2.1 Sizing.
	Water heaters utilized for both potable water heating and space
	-
	heating applications shall be sized
	to prevent the space
	-
	heating load from diminishing the required potable water
	-
	heating capacity.
	1002.2.
	2 Temperature limitation.
	Where a combination potable water
	-
	heating and space
	-
	heating system requires
	water for space heating, a temperature
	actuated mixing valve complying with ASSE 1017 shall be provided to
	temper the water supplied to the potable hot wa
	ter distribution system in accordance with Section 607 of the
	New
	York City Plumbing Code
	.
	1002.2.3 Cross
	-
	connection.
	Water heaters utilized for both potable hot water and hot water for space
	-
	heating
	applications shall have separate heating sections and co
	nnections for distribution systems and shall not be cross
	-
	connected. The potability of the domestic water shall be maintained throughout the system in accordance with the
	New York City Plumbing Code.
	1002.3 Supplemental water
	-
	heating devices.
	Potable
	water
	-
	heating devices that utilize refrigerant
	-
	to
	-
	water heat
	exchangers shall be approved and installed in accordance with the
	New York City
	Plumbing Code
	, the applicable
	provisions of the
	New York City Energy Conservation Code
	and the manufacturer’s
	instructions.
	SECTION MC 1003
	PRESSURE VESSELS
	1003.1 General.
	All pressure vessels shall be constructed and certified in accordance with the
	ASME Boiler and
	Pressure Vessel Code
	, and shall
	bear the label of an approved agency. Pressure vessels shall
	be in
	stalled in accordance
	with the manufacturer’s
	instructions and nationally recognized standards. Directly fired pressure vessels shall meet
	the requirements of Section 1004.
	1003.2 Piping.
	All piping materials, fittings, joints,
	connections
	and devices asso
	ciated with systems utilized in
	con-
	junction
	with pressure vessels shall be designed for the specific application and shall
	comply with the
	ASME Boiler
	and Pressure Vessel Code
	and this code
	.
	1003.3 Welding.
	Welding on pressure vessels shall be performed by
	welders
	certified in
	compliance with nationally
	recognized standards, including the
	National Board Inspection Code
	and
	ASME Boiler and Pressure Vessel Code
	,
	Section
	IX. Such welders shall also comply with 12 NYCRR 4
	-
	6.2, and 12 NYCRR 14
	-
	3.3 through 14
	-
	3.1
	8.
	SECTION
	MC
	1004
	BOILERS
	1004.1 Standards.
	Boilers shall be designed, constructed and certified in accordance with the
	ASME Boiler and Pres-
	sure Vessel Code
	, Section I or IV, and 12 NYCRR Parts 4 and 14. Controls and safety devices for boilers with
	fuel
	input ratings of 12,500,000 Btu/h (3663 kW) or less shall meet the requirements of ASME CSD
	-
	1. Controls and safety
	devices for boilers with inputs greater than 12,500,000 Btu/h (3663 kW) shall meet the requirements of NFPA 85.
	Packaged oil
	-
	fired boile
	rs shall be listed and labeled in accordance with UL 726. Packaged electric boilers shall be
	listed and labeled in accordance with UL 834.
	Approval for oil
	-
	fired boilers 350,000 Btu/h input (102.6 kW) and
	above shall be obtained from the New York City Depa
	rtment of Environmental Protection.
	1004.1.1 Field erected boilers requirements.
	Field erected boiler installations shall comply with the following
	:
	1.
	The vessel erector shall hold the appropriate ASME stamp for vessel construction.
	2.
	The licensed instal
	ler is responsible for the installation of all controls and burners which shall be designed
	and constructed in accordance with the requirements of ASME CSD
	-
	1 and, as applicable, the
	ASME Boiler
	and Pressure Vessel Code
	, 12 NYCRR Parts 4 and 14, and NFPA 85
	.
	3.
	The New York City Department of Environmental Protection shall approve the installation of the boiler and
	burner for compatibility, controls and safety devices.
	4.
	Boiler vessels shall comply with one of the following listings:
	4.1.
	UL 726 or UL 795 a
	s applicable; or
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	4.2.
	UL 2106.
	Exception:
	Unlisted equipment shall obtain approval from the department.
	5.
	Controls and safety devices shall be tested and inspected in accordance with ASME CSD
	-
	1 and, as applicable,
	the
	ASME Boiler and Pressure Vessel Code
	,
	12 NYCRR Parts 4 and 14, and NFPA 85. Testing and inspection
	shall be performed by the burner manufacturer’s authorized representative in the presence of the licensed
	installer.
	6.
	Inspection of the installed boiler assembly shall be performed by the dep
	artment.
	1004.2 Installation.
	In addition to the requirements of this code, the installation of boilers shall conform to the
	man-
	ufacturer’s
	instructions. Operating instructions of a permanent type shall be
	located in
	the boiler
	room and readily
	accessible
	.
	Boilers shall have all controls set, adjusted and tested by the installer. The manufacturer’s rating data and
	the nameplate shall be attached to the boiler.
	1004.3 Working clearance.
	Clearances shall be maintained around boilers, generators, heaters, tanks and related
	equipment and appliances so as to permit inspection, servicing, repair, replacement and visibility of all gauges. When
	boilers are installed or replaced, clearance shall
	be provided to allow access for maintenance and repair
	per the boiler’s
	listing and manufacturer’s instructions.
	Passageways
	for inspection
	around all sides of boilers shall have an unob-
	structed width of not less than 18 inches
	(
	457.2
	mm)
	unless
	the boiler
	’s listing or department approval or manufac-
	turer’s instructions state
	otherwise.
	1004.3.1 Top clearance.
	Clearances from the tops of boilers to the ceiling or other overhead obstruction shall be
	in accordance with Table 1004.3.1.
	TABLE 1004.3.1
	BOILER TOP
	CLEARANCES
	BOILER TYPE
	MINIMUM
	CLEARANCES FROM
	TOP OF BOILER TO
	CEILING OR OTHER
	OVERHEAD
	OBSTRUCTION (feet)
	All boilers with manholes on top of the
	boiler except where a greater clearance is
	required in this table.
	3
	All boilers without
	manholes on top of
	the boiler except high
	-
	pressure steam
	boilers and where a greater clearance is
	required in this table.
	2
	High
	-
	pressure steam boilers with steam
	generating capacity not exceeding 5,000
	pounds per hour.
	3
	High
	-
	pressure steam
	boilers with steam
	generating capacity exceeding 5,000
	pounds per hour.
	7
	High
	-
	pressure steam boilers having heat-
	ing surface not exceeding 1,000 square
	feet.
	3
	High
	-
	pressure steam boilers having heat-
	ing surface in excess of 1,000 square
	feet.
	7
	High
	-
	pressure steam boilers with input
	not exceeding 5,000,000 Btu/h.
	3
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	High
	-
	pressure steam boilers with input in
	excess of 5,000,000 Btu/h.
	7
	Steam
	-
	heating boilers and hot water
	-
	heating boilers with input exceeding
	5,000,000 Btu/h.
	3
	Steam
	-
	heating boilers exceeding 5,000
	pounds of steam per hour.
	3
	Steam
	-
	heating boilers and hot water
	-
	heating boilers having heating surface
	exceeding 1,000 square feet.
	3
	For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m
	2
	, 1 pound per hour = 0.4536
	kg/h, 1 Btu/hr = 0.293 W.
	1004.4 Mounting.
	Equipment
	and appliances
	shall be set or mounted on a level base capable of supporting and dis-
	tributing the weight contained thereon. Boilers, tanks and equipment shall be
	securely anchored to the structure.
	Equ
	ipment and appliances requiring vibration isolation shall be installed as designed by a registered design profes-
	sional
	in accordance with the manufacturer’s instructions.
	1004.5 Floors.
	Boilers shall be mounted on floors of noncombustible
	construction, unless listed for mounting on
	combustible flooring. Vibration isolation shall be in accordance with Section 313. In buildings with residential occu-
	pancies, boilers shall be installed in accordance with the requirements of Section 313.
	1004.6
	Boiler rooms and enclosures.
	Boiler rooms and enclosures and access thereto shall comply with Chapters 5
	and 10 of the
	New York City
	Building Code
	and Chapter 3 of this code. Boiler rooms shall be equipped with a floor
	drain or other approved means for
	disposing
	of liquid waste
	in accordance with the
	New York City Plumbing Code
	.
	1004.7 Operating adjustments and instructions.
	Hot water and steam boil
	ers shall have all operating and safety
	controls set and operationally tested by the installing contractor. A
	complete
	control diagram and boiler operating
	instructions shall be furnished by the installer for each installation.
	A complete control diagram o
	f a permanent type
	shall be located in the boiler room and shall be readily accessible.
	1004.8 Burner controls.
	Gas and oil modulating burners shall be provided with burner controls (oil and gas equiv-
	alent ratings) in accordance with ASME CSD
	-
	1 and NFPA 85
	.
	1004.9 Conversion burners.
	Conversion burners shall be installed in accordance with ANSI Z21.8.
	SECTION MC 1005
	BOILER CONNECTIONS
	1005.1 Valves.
	Every boiler or modular boiler shall have a shutoff valve in the supply and return piping. For multiple
	boil
	er or multiple modular boiler installations, each boiler or modular boiler shall have individual shutoff valves in
	the
	supply
	and return piping.
	Exception:
	Shutoff valves are not required in a system
	having
	a single low
	-
	pressure steam boiler
	of 350,000 Btu
	/h
	(103 kW) output or less
	.
	1005.2 Potable water supply.
	The water supply to all boilers, including but not limited to backflow prevention, shall
	be connected in accordance with the
	New
	York City
	Plumbing Code
	.
	SECTION MC 1006
	SAFETY AND PRESSURE
	RELIEF VALVES
	AND CONTROLS
	1006.1 Safety valves for steam boilers.
	Steam boilers shall be protected with a safety valve
	in accordance with the
	ASME Boiler and Pressure Vessel Code
	or ASME CSD
	-
	1.
	‡‡‡ Chapter 10 was amended by
	Local Law
	77
	of 2023
	. This law has an effective
	date of June 10, 2023.
	CHAPTER 10
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	SECTION MC 1001
	GENERAL
	1001.1 Scope.
	This chapter
	shall establish the minimum safety requirements for and
	shall govern the installation,
	alteration and repair of boilers, wate
	r heaters and pressure vessels.
	Exceptions:
	1.
	Pressure vessels used for unheated water supply.
	2.
	Portable unfired pressure vessels and Interstate
	Commerce
	Commission containers.
	3.
	Containers for bulk oxygen and medical gas.
	4.
	Unfired pressure
	vessels having a volume of 5 cubic feet (0.14 m
	3
	) or less operating at pressures not exceed-
	ing 250 pounds per square inch (psi) (1723.7 kPa) and located within occupancies of Groups B, F, H, M, R,
	S and U.
	5.
	Pressure vessels used in refrigeration systems
	that are regulated by Chapter 11.
	6.
	Pressure tanks used in conjunction with coaxial cables, telephone cables, power cables and other
	similar
	humidity control systems.
	7.
	Any boiler or pressure vessel subject to inspection by federal inspectors.
	1001.2 The
	rmal safety (spill) switches.
	Thermal safety (spill) switches shall be installed in accordance with Section
	801.23.3.
	1001.3 Clearances.
	Minimum clearances at
	boilers, water heaters and pressure vessels shall be maintained in accord-
	ance with Chapter 3.
	SEC
	TION MC 1002
	WATER HEATERS
	1002.1 General.
	Potable water heaters and hot water storage tanks shall be listed and labeled and installed in accord-
	ance with the manufacturer’s instructions, the
	New York City
	Plumbing Code
	and this code. All water heaters shal
	l be
	capable of being removed without first removing a permanent portion of the building structure. The potable water
	connections
	and relief valves for all water heaters shall conform to the requirements of the
	New York City
	Plumbing
	Code
	. Domestic electric water heaters shall comply with UL 174 or UL 1453. Commercial electric water heaters shall
	comply with UL 1453. Oil
	-
	fired water heaters shall comply with UL 732. Approval for oil
	-
	fired water heaters
	350,000
	Btu/h input (103 kW) and above shall be obtained from the New York City Department of Environmental Protection.
	Thermal solar water heaters shall comply with UL 174 or UL 1453, and Chapter 14 of this code. Heat pump water
	heaters shall comply with UL 174 or UL 1995.
	1002.2 Water heaters utilized for s
	pace heating.
	Water heaters utilized both to supply potable hot water and provide
	hot water for space
	-
	heating applications shall be listed and labeled for such applications by the manufacturer and shall
	be
	built in accordance with Section IV of the
	ASME
	Boiler and Pressure Vessel Code
	with an “H” code stamp. Water
	heaters shall be
	installed in accordance with the manufacturer’s instructions
	, the
	ASME Boiler and Pressure Vessel
	Code
	and the
	New York City
	Plumbing Code.
	Oil
	-
	fired heaters shall comply with U
	L 732 and shall have an “HW”
	stamp.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1002.2.1 Sizing.
	Water heaters utilized for both potable water heating and space
	-
	heating applications shall be sized
	to prevent the space
	-
	heating load from diminishing the required potable water
	-
	heating capacity.
	1002.2.
	2 Temperature limitation.
	Where a combination potable water
	-
	heating and space
	-
	heating system requires
	water for space heating, a temperature
	actuated mixing valve complying with ASSE 1017 shall be provided to
	temper the water supplied to the potable hot wa
	ter distribution system in accordance with Section 607 of the
	New
	York City Plumbing Code
	.
	1002.2.3 Cross
	-
	connection.
	Water heaters utilized for both potable hot water and hot water for space
	-
	heating
	applications shall have separate heating sections and co
	nnections for distribution systems and shall not be cross
	-
	connected. The potability of the domestic water shall be maintained throughout the system in accordance with the
	New York City Plumbing Code.
	1002.3 Supplemental water
	-
	heating devices.
	Potable
	water
	-
	heating devices that utilize refrigerant
	-
	to
	-
	water heat
	exchangers shall be approved and installed in accordance with the
	New York City
	Plumbing Code
	, the applicable
	provisions of the
	New York City Energy Conservation Code
	and the manufacturer’s
	instructions.
	SECTION MC 1003
	PRESSURE VESSELS
	1003.1 General.
	All pressure vessels shall be constructed and certified in accordance with the
	ASME Boiler and
	Pressure Vessel Code
	, and shall
	bear the label of an approved agency. Pressure vessels shall
	be in
	stalled in accordance
	with the manufacturer’s
	instructions and nationally recognized standards. Directly fired pressure vessels shall meet
	the requirements of Section 1004.
	1003.2 Piping.
	All piping materials, fittings, joints,
	connections
	and devices asso
	ciated with systems utilized in
	con-
	junction
	with pressure vessels shall be designed for the specific application and shall
	comply with the
	ASME Boiler
	and Pressure Vessel Code
	and this code
	.
	1003.3 Welding.
	Welding on pressure vessels shall be performed by
	welders
	certified in
	compliance with nationally
	recognized standards, including the
	National Board Inspection Code
	and
	ASME Boiler and Pressure Vessel Code
	,
	Section
	IX. Such welders shall also comply with 12 NYCRR 4
	-
	6.2, and 12 NYCRR 14
	-
	3.3 through 14
	-
	3.1
	8.
	SECTION
	MC
	1004
	BOILERS
	1004.1 Standards.
	Boilers shall be designed, constructed and certified in accordance with the
	ASME Boiler and Pres-
	sure Vessel Code
	, Section I or IV, and 12 NYCRR Parts 4 and 14. Controls and safety devices for boilers with
	fuel
	input ratings of 12,500,000 Btu/h (3663 kW) or less shall meet the requirements of ASME CSD
	-
	1. Controls and safety
	devices for boilers with inputs greater than 12,500,000 Btu/h (3663 kW) shall meet the requirements of NFPA 85.
	Packaged oil
	-
	fired boile
	rs shall be listed and labeled in accordance with UL 726. Packaged electric boilers shall be
	listed and labeled in accordance with UL 834.
	Approval for oil
	-
	fired boilers 350,000 Btu/h input (102.6 kW) and
	above shall be obtained from the New York City Depa
	rtment of Environmental Protection.
	1004.1.1 Field erected boilers requirements.
	Field erected boiler installations shall comply with the following
	:
	1.
	The vessel erector shall hold the appropriate ASME stamp for vessel construction.
	2.
	The licensed instal
	ler is responsible for the installation of all controls and burners which shall be designed
	and constructed in accordance with the requirements of ASME CSD
	-
	1 and, as applicable, the
	ASME Boiler
	and Pressure Vessel Code
	, 12 NYCRR Parts 4 and 14, and NFPA 85
	.
	3.
	The New York City Department of Environmental Protection shall approve the installation of the boiler and
	burner for compatibility, controls and safety devices.
	4.
	Boiler vessels shall comply with one of the following listings:
	4.1.
	UL 726 or UL 795 a
	s applicable; or
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	4.2.
	UL 2106.
	Exception:
	Unlisted equipment shall obtain approval from the department.
	5.
	Controls and safety devices shall be tested and inspected in accordance with ASME CSD
	-
	1 and, as applicable,
	the
	ASME Boiler and Pressure Vessel Code
	,
	12 NYCRR Parts 4 and 14, and NFPA 85. Testing and inspection
	shall be performed by the burner manufacturer’s authorized representative in the presence of the licensed
	installer.
	6.
	Inspection of the installed boiler assembly shall be performed by the dep
	artment.
	1004.2 Installation.
	In addition to the requirements of this code, the installation of boilers shall conform to the
	man-
	ufacturer’s
	instructions. Operating instructions of a permanent type shall be
	located in
	the boiler
	room and readily
	accessible
	.
	Boilers shall have all controls set, adjusted and tested by the installer. The manufacturer’s rating data and
	the nameplate shall be attached to the boiler.
	1004.3 Working clearance.
	Clearances shall be maintained around boilers, generators, heaters, tanks and related
	equipment and appliances so as to permit inspection, servicing, repair, replacement and visibility of all gauges. When
	boilers are installed or replaced, clearance shall
	be provided to allow access for maintenance and repair
	per the boiler’s
	listing and manufacturer’s instructions.
	Passageways
	for inspection
	around all sides of boilers shall have an unob-
	structed width of not less than 18 inches
	(
	457.2
	mm)
	unless
	the boiler
	’s listing or department approval or manufac-
	turer’s instructions state
	otherwise.
	1004.3.1 Top clearance.
	Clearances from the tops of boilers to the ceiling or other overhead obstruction shall be
	in accordance with Table 1004.3.1.
	TABLE 1004.3.1
	BOILER TOP
	CLEARANCES
	BOILER TYPE
	MINIMUM
	CLEARANCES FROM
	TOP OF BOILER TO
	CEILING OR OTHER
	OVERHEAD
	OBSTRUCTION (feet)
	All boilers with manholes on top of the
	boiler except where a greater clearance is
	required in this table.
	3
	All boilers without
	manholes on top of
	the boiler except high
	-
	pressure steam
	boilers and where a greater clearance is
	required in this table.
	2
	High
	-
	pressure steam boilers with steam
	generating capacity not exceeding 5,000
	pounds per hour.
	3
	High
	-
	pressure steam
	boilers with steam
	generating capacity exceeding 5,000
	pounds per hour.
	7
	High
	-
	pressure steam boilers having heat-
	ing surface not exceeding 1,000 square
	feet.
	3
	High
	-
	pressure steam boilers having heat-
	ing surface in excess of 1,000 square
	feet.
	7
	High
	-
	pressure steam boilers with input
	not exceeding 5,000,000 Btu/h.
	3
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	High
	-
	pressure steam boilers with input in
	excess of 5,000,000 Btu/h.
	7
	Steam
	-
	heating boilers and hot water
	-
	heating boilers with input exceeding
	5,000,000 Btu/h.
	3
	Steam
	-
	heating boilers exceeding 5,000
	pounds of steam per hour.
	3
	Steam
	-
	heating boilers and hot water
	-
	heating boilers having heating surface
	exceeding 1,000 square feet.
	3
	For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m
	2
	, 1 pound per hour = 0.4536
	kg/h, 1 Btu/hr = 0.293 W.
	1004.4 Mounting.
	Equipment
	and appliances
	shall be set or mounted on a level base capable of supporting and dis-
	tributing the weight contained thereon. Boilers, tanks and equipment shall be
	securely anchored to the structure.
	Equ
	ipment and appliances requiring vibration isolation shall be installed as designed by a registered design profes-
	sional
	in accordance with the manufacturer’s instructions.
	1004.5 Floors.
	Boilers shall be mounted on floors of noncombustible
	construction, unless listed for mounting on
	combustible flooring. Vibration isolation shall be in accordance with Section 313. In buildings with residential occu-
	pancies, boilers shall be installed in accordance with the requirements of Section 313.
	1004.6
	Boiler rooms and enclosures.
	Boiler rooms and enclosures and access thereto shall comply with Chapters 5
	and 10 of the
	New York City
	Building Code
	and Chapter 3 of this code. Boiler rooms shall be equipped with a floor
	drain or other approved means for
	disposing
	of liquid waste
	in accordance with the
	New York City Plumbing Code
	.
	1004.7 Operating adjustments and instructions.
	Hot water and steam boil
	ers shall have all operating and safety
	controls set and operationally tested by the installing contractor. A
	complete
	control diagram and boiler operating
	instructions shall be furnished by the installer for each installation.
	A complete control diagram o
	f a permanent type
	shall be located in the boiler room and shall be readily accessible.
	1004.8 Burner controls.
	Gas and oil modulating burners shall be provided with burner controls (oil and gas equiv-
	alent ratings) in accordance with ASME CSD
	-
	1 and NFPA 85
	.
	1004.9 Conversion burners.
	Conversion burners shall be installed in accordance with ANSI Z21.8.
	SECTION MC 1005
	BOILER CONNECTIONS
	1005.1 Valves.
	Every boiler or modular boiler shall have a shutoff valve in the supply and return piping. For multiple
	boil
	er or multiple modular boiler installations, each boiler or modular boiler shall have individual shutoff valves in
	the
	supply
	and return piping.
	Exception:
	Shutoff valves are not required in a system
	having
	a single low
	-
	pressure steam boiler
	of 350,000 Btu
	/h
	(103 kW) output or less
	.
	1005.2 Potable water supply.
	The water supply to all boilers, including but not limited to backflow prevention, shall
	be connected in accordance with the
	New
	York City
	Plumbing Code
	.
	SECTION MC 1006
	SAFETY AND PRESSURE
	RELIEF VALVES
	AND CONTROLS
	1006.1 Safety valves for steam boilers.
	Steam boilers shall be protected with a safety valve
	in accordance with the
	ASME Boiler and Pressure Vessel Code
	or ASME CSD
	-
	1.
	‡‡‡ Chapter 10 was amended by
	Local Law
	77
	of 2023
	. This law has an effective
	date of June 10, 2023.
	CHAPTER 10
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	SECTION MC 1001
	GENERAL
	1001.1 Scope.
	This chapter
	shall establish the minimum safety requirements for and
	shall govern the installation,
	alteration and repair of boilers, wate
	r heaters and pressure vessels.
	Exceptions:
	1.
	Pressure vessels used for unheated water supply.
	2.
	Portable unfired pressure vessels and Interstate
	Commerce
	Commission containers.
	3.
	Containers for bulk oxygen and medical gas.
	4.
	Unfired pressure
	vessels having a volume of 5 cubic feet (0.14 m
	3
	) or less operating at pressures not exceed-
	ing 250 pounds per square inch (psi) (1723.7 kPa) and located within occupancies of Groups B, F, H, M, R,
	S and U.
	5.
	Pressure vessels used in refrigeration systems
	that are regulated by Chapter 11.
	6.
	Pressure tanks used in conjunction with coaxial cables, telephone cables, power cables and other
	similar
	humidity control systems.
	7.
	Any boiler or pressure vessel subject to inspection by federal inspectors.
	1001.2 The
	rmal safety (spill) switches.
	Thermal safety (spill) switches shall be installed in accordance with Section
	801.23.3.
	1001.3 Clearances.
	Minimum clearances at
	boilers, water heaters and pressure vessels shall be maintained in accord-
	ance with Chapter 3.
	SEC
	TION MC 1002
	WATER HEATERS
	1002.1 General.
	Potable water heaters and hot water storage tanks shall be listed and labeled and installed in accord-
	ance with the manufacturer’s instructions, the
	New York City
	Plumbing Code
	and this code. All water heaters shal
	l be
	capable of being removed without first removing a permanent portion of the building structure. The potable water
	connections
	and relief valves for all water heaters shall conform to the requirements of the
	New York City
	Plumbing
	Code
	. Domestic electric water heaters shall comply with UL 174 or UL 1453. Commercial electric water heaters shall
	comply with UL 1453. Oil
	-
	fired water heaters shall comply with UL 732. Approval for oil
	-
	fired water heaters
	350,000
	Btu/h input (103 kW) and above shall be obtained from the New York City Department of Environmental Protection.
	Thermal solar water heaters shall comply with UL 174 or UL 1453, and Chapter 14 of this code. Heat pump water
	heaters shall comply with UL 174 or UL 1995.
	1002.2 Water heaters utilized for s
	pace heating.
	Water heaters utilized both to supply potable hot water and provide
	hot water for space
	-
	heating applications shall be listed and labeled for such applications by the manufacturer and shall
	be
	built in accordance with Section IV of the
	ASME
	Boiler and Pressure Vessel Code
	with an “H” code stamp. Water
	heaters shall be
	installed in accordance with the manufacturer’s instructions
	, the
	ASME Boiler and Pressure Vessel
	Code
	and the
	New York City
	Plumbing Code.
	Oil
	-
	fired heaters shall comply with U
	L 732 and shall have an “HW”
	stamp.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1002.2.1 Sizing.
	Water heaters utilized for both potable water heating and space
	-
	heating applications shall be sized
	to prevent the space
	-
	heating load from diminishing the required potable water
	-
	heating capacity.
	1002.2.
	2 Temperature limitation.
	Where a combination potable water
	-
	heating and space
	-
	heating system requires
	water for space heating, a temperature
	actuated mixing valve complying with ASSE 1017 shall be provided to
	temper the water supplied to the potable hot wa
	ter distribution system in accordance with Section 607 of the
	New
	York City Plumbing Code
	.
	1002.2.3 Cross
	-
	connection.
	Water heaters utilized for both potable hot water and hot water for space
	-
	heating
	applications shall have separate heating sections and co
	nnections for distribution systems and shall not be cross
	-
	connected. The potability of the domestic water shall be maintained throughout the system in accordance with the
	New York City Plumbing Code.
	1002.3 Supplemental water
	-
	heating devices.
	Potable
	water
	-
	heating devices that utilize refrigerant
	-
	to
	-
	water heat
	exchangers shall be approved and installed in accordance with the
	New York City
	Plumbing Code
	, the applicable
	provisions of the
	New York City Energy Conservation Code
	and the manufacturer’s
	instructions.
	SECTION MC 1003
	PRESSURE VESSELS
	1003.1 General.
	All pressure vessels shall be constructed and certified in accordance with the
	ASME Boiler and
	Pressure Vessel Code
	, and shall
	bear the label of an approved agency. Pressure vessels shall
	be in
	stalled in accordance
	with the manufacturer’s
	instructions and nationally recognized standards. Directly fired pressure vessels shall meet
	the requirements of Section 1004.
	1003.2 Piping.
	All piping materials, fittings, joints,
	connections
	and devices asso
	ciated with systems utilized in
	con-
	junction
	with pressure vessels shall be designed for the specific application and shall
	comply with the
	ASME Boiler
	and Pressure Vessel Code
	and this code
	.
	1003.3 Welding.
	Welding on pressure vessels shall be performed by
	welders
	certified in
	compliance with nationally
	recognized standards, including the
	National Board Inspection Code
	and
	ASME Boiler and Pressure Vessel Code
	,
	Section
	IX. Such welders shall also comply with 12 NYCRR 4
	-
	6.2, and 12 NYCRR 14
	-
	3.3 through 14
	-
	3.1
	8.
	SECTION
	MC
	1004
	BOILERS
	1004.1 Standards.
	Boilers shall be designed, constructed and certified in accordance with the
	ASME Boiler and Pres-
	sure Vessel Code
	, Section I or IV, and 12 NYCRR Parts 4 and 14. Controls and safety devices for boilers with
	fuel
	input ratings of 12,500,000 Btu/h (3663 kW) or less shall meet the requirements of ASME CSD
	-
	1. Controls and safety
	devices for boilers with inputs greater than 12,500,000 Btu/h (3663 kW) shall meet the requirements of NFPA 85.
	Packaged oil
	-
	fired boile
	rs shall be listed and labeled in accordance with UL 726. Packaged electric boilers shall be
	listed and labeled in accordance with UL 834.
	Approval for oil
	-
	fired boilers 350,000 Btu/h input (102.6 kW) and
	above shall be obtained from the New York City Depa
	rtment of Environmental Protection.
	1004.1.1 Field erected boilers requirements.
	Field erected boiler installations shall comply with the following
	:
	1.
	The vessel erector shall hold the appropriate ASME stamp for vessel construction.
	2.
	The licensed instal
	ler is responsible for the installation of all controls and burners which shall be designed
	and constructed in accordance with the requirements of ASME CSD
	-
	1 and, as applicable, the
	ASME Boiler
	and Pressure Vessel Code
	, 12 NYCRR Parts 4 and 14, and NFPA 85
	.
	3.
	The New York City Department of Environmental Protection shall approve the installation of the boiler and
	burner for compatibility, controls and safety devices.
	4.
	Boiler vessels shall comply with one of the following listings:
	4.1.
	UL 726 or UL 795 a
	s applicable; or
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	4.2.
	UL 2106.
	Exception:
	Unlisted equipment shall obtain approval from the department.
	5.
	Controls and safety devices shall be tested and inspected in accordance with ASME CSD
	-
	1 and, as applicable,
	the
	ASME Boiler and Pressure Vessel Code
	,
	12 NYCRR Parts 4 and 14, and NFPA 85. Testing and inspection
	shall be performed by the burner manufacturer’s authorized representative in the presence of the licensed
	installer.
	6.
	Inspection of the installed boiler assembly shall be performed by the dep
	artment.
	1004.2 Installation.
	In addition to the requirements of this code, the installation of boilers shall conform to the
	man-
	ufacturer’s
	instructions. Operating instructions of a permanent type shall be
	located in
	the boiler
	room and readily
	accessible
	.
	Boilers shall have all controls set, adjusted and tested by the installer. The manufacturer’s rating data and
	the nameplate shall be attached to the boiler.
	1004.3 Working clearance.
	Clearances shall be maintained around boilers, generators, heaters, tanks and related
	equipment and appliances so as to permit inspection, servicing, repair, replacement and visibility of all gauges. When
	boilers are installed or replaced, clearance shall
	be provided to allow access for maintenance and repair
	per the boiler’s
	listing and manufacturer’s instructions.
	Passageways
	for inspection
	around all sides of boilers shall have an unob-
	structed width of not less than 18 inches
	(
	457.2
	mm)
	unless
	the boiler
	’s listing or department approval or manufac-
	turer’s instructions state
	otherwise.
	1004.3.1 Top clearance.
	Clearances from the tops of boilers to the ceiling or other overhead obstruction shall be
	in accordance with Table 1004.3.1.
	TABLE 1004.3.1
	BOILER TOP
	CLEARANCES
	BOILER TYPE
	MINIMUM
	CLEARANCES FROM
	TOP OF BOILER TO
	CEILING OR OTHER
	OVERHEAD
	OBSTRUCTION (feet)
	All boilers with manholes on top of the
	boiler except where a greater clearance is
	required in this table.
	3
	All boilers without
	manholes on top of
	the boiler except high
	-
	pressure steam
	boilers and where a greater clearance is
	required in this table.
	2
	High
	-
	pressure steam boilers with steam
	generating capacity not exceeding 5,000
	pounds per hour.
	3
	High
	-
	pressure steam
	boilers with steam
	generating capacity exceeding 5,000
	pounds per hour.
	7
	High
	-
	pressure steam boilers having heat-
	ing surface not exceeding 1,000 square
	feet.
	3
	High
	-
	pressure steam boilers having heat-
	ing surface in excess of 1,000 square
	feet.
	7
	High
	-
	pressure steam boilers with input
	not exceeding 5,000,000 Btu/h.
	3
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	High
	-
	pressure steam boilers with input in
	excess of 5,000,000 Btu/h.
	7
	Steam
	-
	heating boilers and hot water
	-
	heating boilers with input exceeding
	5,000,000 Btu/h.
	3
	Steam
	-
	heating boilers exceeding 5,000
	pounds of steam per hour.
	3
	Steam
	-
	heating boilers and hot water
	-
	heating boilers having heating surface
	exceeding 1,000 square feet.
	3
	For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m
	2
	, 1 pound per hour = 0.4536
	kg/h, 1 Btu/hr = 0.293 W.
	1004.4 Mounting.
	Equipment
	and appliances
	shall be set or mounted on a level base capable of supporting and dis-
	tributing the weight contained thereon. Boilers, tanks and equipment shall be
	securely anchored to the structure.
	Equ
	ipment and appliances requiring vibration isolation shall be installed as designed by a registered design profes-
	sional
	in accordance with the manufacturer’s instructions.
	1004.5 Floors.
	Boilers shall be mounted on floors of noncombustible
	construction, unless listed for mounting on
	combustible flooring. Vibration isolation shall be in accordance with Section 313. In buildings with residential occu-
	pancies, boilers shall be installed in accordance with the requirements of Section 313.
	1004.6
	Boiler rooms and enclosures.
	Boiler rooms and enclosures and access thereto shall comply with Chapters 5
	and 10 of the
	New York City
	Building Code
	and Chapter 3 of this code. Boiler rooms shall be equipped with a floor
	drain or other approved means for
	disposing
	of liquid waste
	in accordance with the
	New York City Plumbing Code
	.
	1004.7 Operating adjustments and instructions.
	Hot water and steam boil
	ers shall have all operating and safety
	controls set and operationally tested by the installing contractor. A
	complete
	control diagram and boiler operating
	instructions shall be furnished by the installer for each installation.
	A complete control diagram o
	f a permanent type
	shall be located in the boiler room and shall be readily accessible.
	1004.8 Burner controls.
	Gas and oil modulating burners shall be provided with burner controls (oil and gas equiv-
	alent ratings) in accordance with ASME CSD
	-
	1 and NFPA 85
	.
	1004.9 Conversion burners.
	Conversion burners shall be installed in accordance with ANSI Z21.8.
	SECTION MC 1005
	BOILER CONNECTIONS
	1005.1 Valves.
	Every boiler or modular boiler shall have a shutoff valve in the supply and return piping. For multiple
	boil
	er or multiple modular boiler installations, each boiler or modular boiler shall have individual shutoff valves in
	the
	supply
	and return piping.
	Exception:
	Shutoff valves are not required in a system
	having
	a single low
	-
	pressure steam boiler
	of 350,000 Btu
	/h
	(103 kW) output or less
	.
	1005.2 Potable water supply.
	The water supply to all boilers, including but not limited to backflow prevention, shall
	be connected in accordance with the
	New
	York City
	Plumbing Code
	.
	SECTION MC 1006
	SAFETY AND PRESSURE
	RELIEF VALVES
	AND CONTROLS
	1006.1 Safety valves for steam boilers.
	Steam boilers shall be protected with a safety valve
	in accordance with the
	ASME Boiler and Pressure Vessel Code
	or ASME CSD
	-
	1.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1006.2 Safety relief valves for hot water boilers.
	Hot water
	boilers shall be protected with a safety relief valve
	in
	accordance with the
	ASME Boiler and Pressure Vessel Code
	or ASME CSD
	-
	1
	.
	1006.3 Pressure relief for pressure vessels.
	Pressure vessels
	shall be protected with a pressure relief valve or
	pres-
	sure
	-
	limit
	ing device as required by the manufacturer’s instructions for the pressure vessel and
	in accordance with the
	ASME Boiler and Pressure Vessel Code
	or ASME CSD
	-
	1.
	1006.4 Standards of safety and safety relief valves.
	Safety and safety relief valves shall be l
	isted and labeled, and
	shall have a minimum rated capacity for the equipment or appliances served. Safety and safety relief valves shall be
	set at not greater than the nameplate pressure rating of the boiler or pressure vessel and shall be in accordance wi
	th
	the
	ASME Boiler and Pressure Vessel Code
	or the ASME CSD
	-
	1
	.
	1006.5 Installation.
	Safety or relief valves shall be installed directly into the safety or relief valve opening on the
	boiler or pressure vessel. Valves shall not be located on either side of a safety or relief valve connection. The relief
	valve drain shall
	discharge by gravi
	ty to a nonhazardous point of discharge without obstruction.‡
	1006.6 Safety and relief valve discharge.
	Safety and relief valve discharge pipes shall be of rigid pipe that is approved
	for the temperature of the system. The discharge pipe shall
	, at a minimu
	m,
	be the same diameter as the safety or relief
	valve outlet. Safety and relief valve discharge pipes shall be properly supported to prevent stress on the valve and
	vessel. Safety and relief valves shall not discharge so as to be a hazard, a potential caus
	e of damage or otherwise a
	nuisance.
	Discharge of hazardous materials must be properly contained in a method approved by the department.
	High
	-
	pressure
	-
	steam safety valves shall be vented to the outside of the structure. Where a low
	-
	pressure safety valve
	or
	a relief valve discharges to the drainage system, the installation shall conform to the
	New York City
	Plumbing Code
	.
	1006.7 Boiler safety devices.
	Boilers shall be equipped with controls and limit devices as required by the manufac-
	turer’s instructions and
	the conditions of the listing.
	1006.8 Electrical requirements.
	The power supply to the electrical control system shall be from a two
	-
	wire branch
	circuit
	that has a grounded conductor, or from an isolation
	trans
	-
	former
	with a two
	-
	wire secondary. Where an i
	solation
	transformer is provided, one conductor of the secondary
	winding
	shall be grounded. Control voltage shall not exceed
	150 volts nominal, line to line. Control and limit devices shall
	interrupt
	the ungrounded side of the circuit. A means
	of manually
	disconnecting the control circuit shall be provided and controls shall be arranged so that when deener-
	gized, the burner shall be inoperative. Such disconnecting means shall be capable of being locked in the off position
	and shall be provided with ready acc
	ess.
	1006.8.1 Remote control (shutdown).
	A remote control shall be provided to stop the flow of oil and/or gas and
	combustion air to any burner or fuel
	-
	burning internal combustion equipment. Such a control shall be provided
	along every means of egress from
	the room in which the burner or equipment is located. Each remote control shall
	be located outside of, but as close as practicable to the burner or equipment room itself and shall be labeled:
	“REMOTE CONTROL FOR BURNER.”
	Exception:
	Where an outside locati
	on is impracticable, the remote control shutdown may be provided immedi-
	ately inside the room in which the burner or equipment is located.
	Such location must be accessible at all times.
	1006.9 Carbon monoxide detectors.
	Carbon monoxide detectors shall be p
	rovided in all fuel
	-
	fired appliance rooms
	to detect the level of carbon monoxide in the room and signal an alarm. Such detectors shall be listed and installed
	in accordance with Chapter 9 of the
	New York City Building Code
	.
	SECTION
	MC
	1007
	BOILER
	LOW
	-
	WATER CUTOFF
	1007.1 General.
	Steam and hot water boilers shall be protected with
	dual
	low
	-
	water cutoff control, with each control
	independently piped to the pressure vessel in accordance with ASME CSD
	-
	1. For hydronic boilers, the low
	-
	water cut
	out may
	be located in the supply piping above the boiler before any intervening valve. A flow
	-
	sensing control installed
	in accordance with ASME CSD
	-
	1 shall be considered a low
	-
	water cutoff for the purposes of this section.
	Exception:
	Hot water
	boilers
	located wit
	hin a dwelling unit supplying only
	that
	unit and having a total heat input
	of
	less than 400,000 Btu/h (117.2 kW) may be
	protected
	by only one low
	-
	water cutoff
	control.
	‡‡‡ Chapter 10 was amended by
	Local Law
	77
	of 2023
	. This law has an effective
	date of June 10, 2023.
	CHAPTER 10
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	SECTION MC 1001
	GENERAL
	1001.1 Scope.
	This chapter
	shall establish the minimum safety requirements for and
	shall govern the installation,
	alteration and repair of boilers, wate
	r heaters and pressure vessels.
	Exceptions:
	1.
	Pressure vessels used for unheated water supply.
	2.
	Portable unfired pressure vessels and Interstate
	Commerce
	Commission containers.
	3.
	Containers for bulk oxygen and medical gas.
	4.
	Unfired pressure
	vessels having a volume of 5 cubic feet (0.14 m
	3
	) or less operating at pressures not exceed-
	ing 250 pounds per square inch (psi) (1723.7 kPa) and located within occupancies of Groups B, F, H, M, R,
	S and U.
	5.
	Pressure vessels used in refrigeration systems
	that are regulated by Chapter 11.
	6.
	Pressure tanks used in conjunction with coaxial cables, telephone cables, power cables and other
	similar
	humidity control systems.
	7.
	Any boiler or pressure vessel subject to inspection by federal inspectors.
	1001.2 The
	rmal safety (spill) switches.
	Thermal safety (spill) switches shall be installed in accordance with Section
	801.23.3.
	1001.3 Clearances.
	Minimum clearances at
	boilers, water heaters and pressure vessels shall be maintained in accord-
	ance with Chapter 3.
	SEC
	TION MC 1002
	WATER HEATERS
	1002.1 General.
	Potable water heaters and hot water storage tanks shall be listed and labeled and installed in accord-
	ance with the manufacturer’s instructions, the
	New York City
	Plumbing Code
	and this code. All water heaters shal
	l be
	capable of being removed without first removing a permanent portion of the building structure. The potable water
	connections
	and relief valves for all water heaters shall conform to the requirements of the
	New York City
	Plumbing
	Code
	. Domestic electric water heaters shall comply with UL 174 or UL 1453. Commercial electric water heaters shall
	comply with UL 1453. Oil
	-
	fired water heaters shall comply with UL 732. Approval for oil
	-
	fired water heaters
	350,000
	Btu/h input (103 kW) and above shall be obtained from the New York City Department of Environmental Protection.
	Thermal solar water heaters shall comply with UL 174 or UL 1453, and Chapter 14 of this code. Heat pump water
	heaters shall comply with UL 174 or UL 1995.
	1002.2 Water heaters utilized for s
	pace heating.
	Water heaters utilized both to supply potable hot water and provide
	hot water for space
	-
	heating applications shall be listed and labeled for such applications by the manufacturer and shall
	be
	built in accordance with Section IV of the
	ASME
	Boiler and Pressure Vessel Code
	with an “H” code stamp. Water
	heaters shall be
	installed in accordance with the manufacturer’s instructions
	, the
	ASME Boiler and Pressure Vessel
	Code
	and the
	New York City
	Plumbing Code.
	Oil
	-
	fired heaters shall comply with U
	L 732 and shall have an “HW”
	stamp.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1002.2.1 Sizing.
	Water heaters utilized for both potable water heating and space
	-
	heating applications shall be sized
	to prevent the space
	-
	heating load from diminishing the required potable water
	-
	heating capacity.
	1002.2.
	2 Temperature limitation.
	Where a combination potable water
	-
	heating and space
	-
	heating system requires
	water for space heating, a temperature
	actuated mixing valve complying with ASSE 1017 shall be provided to
	temper the water supplied to the potable hot wa
	ter distribution system in accordance with Section 607 of the
	New
	York City Plumbing Code
	.
	1002.2.3 Cross
	-
	connection.
	Water heaters utilized for both potable hot water and hot water for space
	-
	heating
	applications shall have separate heating sections and co
	nnections for distribution systems and shall not be cross
	-
	connected. The potability of the domestic water shall be maintained throughout the system in accordance with the
	New York City Plumbing Code.
	1002.3 Supplemental water
	-
	heating devices.
	Potable
	water
	-
	heating devices that utilize refrigerant
	-
	to
	-
	water heat
	exchangers shall be approved and installed in accordance with the
	New York City
	Plumbing Code
	, the applicable
	provisions of the
	New York City Energy Conservation Code
	and the manufacturer’s
	instructions.
	SECTION MC 1003
	PRESSURE VESSELS
	1003.1 General.
	All pressure vessels shall be constructed and certified in accordance with the
	ASME Boiler and
	Pressure Vessel Code
	, and shall
	bear the label of an approved agency. Pressure vessels shall
	be in
	stalled in accordance
	with the manufacturer’s
	instructions and nationally recognized standards. Directly fired pressure vessels shall meet
	the requirements of Section 1004.
	1003.2 Piping.
	All piping materials, fittings, joints,
	connections
	and devices asso
	ciated with systems utilized in
	con-
	junction
	with pressure vessels shall be designed for the specific application and shall
	comply with the
	ASME Boiler
	and Pressure Vessel Code
	and this code
	.
	1003.3 Welding.
	Welding on pressure vessels shall be performed by
	welders
	certified in
	compliance with nationally
	recognized standards, including the
	National Board Inspection Code
	and
	ASME Boiler and Pressure Vessel Code
	,
	Section
	IX. Such welders shall also comply with 12 NYCRR 4
	-
	6.2, and 12 NYCRR 14
	-
	3.3 through 14
	-
	3.1
	8.
	SECTION
	MC
	1004
	BOILERS
	1004.1 Standards.
	Boilers shall be designed, constructed and certified in accordance with the
	ASME Boiler and Pres-
	sure Vessel Code
	, Section I or IV, and 12 NYCRR Parts 4 and 14. Controls and safety devices for boilers with
	fuel
	input ratings of 12,500,000 Btu/h (3663 kW) or less shall meet the requirements of ASME CSD
	-
	1. Controls and safety
	devices for boilers with inputs greater than 12,500,000 Btu/h (3663 kW) shall meet the requirements of NFPA 85.
	Packaged oil
	-
	fired boile
	rs shall be listed and labeled in accordance with UL 726. Packaged electric boilers shall be
	listed and labeled in accordance with UL 834.
	Approval for oil
	-
	fired boilers 350,000 Btu/h input (102.6 kW) and
	above shall be obtained from the New York City Depa
	rtment of Environmental Protection.
	1004.1.1 Field erected boilers requirements.
	Field erected boiler installations shall comply with the following
	:
	1.
	The vessel erector shall hold the appropriate ASME stamp for vessel construction.
	2.
	The licensed instal
	ler is responsible for the installation of all controls and burners which shall be designed
	and constructed in accordance with the requirements of ASME CSD
	-
	1 and, as applicable, the
	ASME Boiler
	and Pressure Vessel Code
	, 12 NYCRR Parts 4 and 14, and NFPA 85
	.
	3.
	The New York City Department of Environmental Protection shall approve the installation of the boiler and
	burner for compatibility, controls and safety devices.
	4.
	Boiler vessels shall comply with one of the following listings:
	4.1.
	UL 726 or UL 795 a
	s applicable; or
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	4.2.
	UL 2106.
	Exception:
	Unlisted equipment shall obtain approval from the department.
	5.
	Controls and safety devices shall be tested and inspected in accordance with ASME CSD
	-
	1 and, as applicable,
	the
	ASME Boiler and Pressure Vessel Code
	,
	12 NYCRR Parts 4 and 14, and NFPA 85. Testing and inspection
	shall be performed by the burner manufacturer’s authorized representative in the presence of the licensed
	installer.
	6.
	Inspection of the installed boiler assembly shall be performed by the dep
	artment.
	1004.2 Installation.
	In addition to the requirements of this code, the installation of boilers shall conform to the
	man-
	ufacturer’s
	instructions. Operating instructions of a permanent type shall be
	located in
	the boiler
	room and readily
	accessible
	.
	Boilers shall have all controls set, adjusted and tested by the installer. The manufacturer’s rating data and
	the nameplate shall be attached to the boiler.
	1004.3 Working clearance.
	Clearances shall be maintained around boilers, generators, heaters, tanks and related
	equipment and appliances so as to permit inspection, servicing, repair, replacement and visibility of all gauges. When
	boilers are installed or replaced, clearance shall
	be provided to allow access for maintenance and repair
	per the boiler’s
	listing and manufacturer’s instructions.
	Passageways
	for inspection
	around all sides of boilers shall have an unob-
	structed width of not less than 18 inches
	(
	457.2
	mm)
	unless
	the boiler
	’s listing or department approval or manufac-
	turer’s instructions state
	otherwise.
	1004.3.1 Top clearance.
	Clearances from the tops of boilers to the ceiling or other overhead obstruction shall be
	in accordance with Table 1004.3.1.
	TABLE 1004.3.1
	BOILER TOP
	CLEARANCES
	BOILER TYPE
	MINIMUM
	CLEARANCES FROM
	TOP OF BOILER TO
	CEILING OR OTHER
	OVERHEAD
	OBSTRUCTION (feet)
	All boilers with manholes on top of the
	boiler except where a greater clearance is
	required in this table.
	3
	All boilers without
	manholes on top of
	the boiler except high
	-
	pressure steam
	boilers and where a greater clearance is
	required in this table.
	2
	High
	-
	pressure steam boilers with steam
	generating capacity not exceeding 5,000
	pounds per hour.
	3
	High
	-
	pressure steam
	boilers with steam
	generating capacity exceeding 5,000
	pounds per hour.
	7
	High
	-
	pressure steam boilers having heat-
	ing surface not exceeding 1,000 square
	feet.
	3
	High
	-
	pressure steam boilers having heat-
	ing surface in excess of 1,000 square
	feet.
	7
	High
	-
	pressure steam boilers with input
	not exceeding 5,000,000 Btu/h.
	3
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	High
	-
	pressure steam boilers with input in
	excess of 5,000,000 Btu/h.
	7
	Steam
	-
	heating boilers and hot water
	-
	heating boilers with input exceeding
	5,000,000 Btu/h.
	3
	Steam
	-
	heating boilers exceeding 5,000
	pounds of steam per hour.
	3
	Steam
	-
	heating boilers and hot water
	-
	heating boilers having heating surface
	exceeding 1,000 square feet.
	3
	For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m
	2
	, 1 pound per hour = 0.4536
	kg/h, 1 Btu/hr = 0.293 W.
	1004.4 Mounting.
	Equipment
	and appliances
	shall be set or mounted on a level base capable of supporting and dis-
	tributing the weight contained thereon. Boilers, tanks and equipment shall be
	securely anchored to the structure.
	Equ
	ipment and appliances requiring vibration isolation shall be installed as designed by a registered design profes-
	sional
	in accordance with the manufacturer’s instructions.
	1004.5 Floors.
	Boilers shall be mounted on floors of noncombustible
	construction, unless listed for mounting on
	combustible flooring. Vibration isolation shall be in accordance with Section 313. In buildings with residential occu-
	pancies, boilers shall be installed in accordance with the requirements of Section 313.
	1004.6
	Boiler rooms and enclosures.
	Boiler rooms and enclosures and access thereto shall comply with Chapters 5
	and 10 of the
	New York City
	Building Code
	and Chapter 3 of this code. Boiler rooms shall be equipped with a floor
	drain or other approved means for
	disposing
	of liquid waste
	in accordance with the
	New York City Plumbing Code
	.
	1004.7 Operating adjustments and instructions.
	Hot water and steam boil
	ers shall have all operating and safety
	controls set and operationally tested by the installing contractor. A
	complete
	control diagram and boiler operating
	instructions shall be furnished by the installer for each installation.
	A complete control diagram o
	f a permanent type
	shall be located in the boiler room and shall be readily accessible.
	1004.8 Burner controls.
	Gas and oil modulating burners shall be provided with burner controls (oil and gas equiv-
	alent ratings) in accordance with ASME CSD
	-
	1 and NFPA 85
	.
	1004.9 Conversion burners.
	Conversion burners shall be installed in accordance with ANSI Z21.8.
	SECTION MC 1005
	BOILER CONNECTIONS
	1005.1 Valves.
	Every boiler or modular boiler shall have a shutoff valve in the supply and return piping. For multiple
	boil
	er or multiple modular boiler installations, each boiler or modular boiler shall have individual shutoff valves in
	the
	supply
	and return piping.
	Exception:
	Shutoff valves are not required in a system
	having
	a single low
	-
	pressure steam boiler
	of 350,000 Btu
	/h
	(103 kW) output or less
	.
	1005.2 Potable water supply.
	The water supply to all boilers, including but not limited to backflow prevention, shall
	be connected in accordance with the
	New
	York City
	Plumbing Code
	.
	SECTION MC 1006
	SAFETY AND PRESSURE
	RELIEF VALVES
	AND CONTROLS
	1006.1 Safety valves for steam boilers.
	Steam boilers shall be protected with a safety valve
	in accordance with the
	ASME Boiler and Pressure Vessel Code
	or ASME CSD
	-
	1.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1006.2 Safety relief valves for hot water boilers.
	Hot water
	boilers shall be protected with a safety relief valve
	in
	accordance with the
	ASME Boiler and Pressure Vessel Code
	or ASME CSD
	-
	1
	.
	1006.3 Pressure relief for pressure vessels.
	Pressure vessels
	shall be protected with a pressure relief valve or
	pres-
	sure
	-
	limit
	ing device as required by the manufacturer’s instructions for the pressure vessel and
	in accordance with the
	ASME Boiler and Pressure Vessel Code
	or ASME CSD
	-
	1.
	1006.4 Standards of safety and safety relief valves.
	Safety and safety relief valves shall be l
	isted and labeled, and
	shall have a minimum rated capacity for the equipment or appliances served. Safety and safety relief valves shall be
	set at not greater than the nameplate pressure rating of the boiler or pressure vessel and shall be in accordance wi
	th
	the
	ASME Boiler and Pressure Vessel Code
	or the ASME CSD
	-
	1
	.
	1006.5 Installation.
	Safety or relief valves shall be installed directly into the safety or relief valve opening on the
	boiler or pressure vessel. Valves shall not be located on either side of a safety or relief valve connection. The relief
	valve drain shall
	discharge by gravi
	ty to a nonhazardous point of discharge without obstruction.‡
	1006.6 Safety and relief valve discharge.
	Safety and relief valve discharge pipes shall be of rigid pipe that is approved
	for the temperature of the system. The discharge pipe shall
	, at a minimu
	m,
	be the same diameter as the safety or relief
	valve outlet. Safety and relief valve discharge pipes shall be properly supported to prevent stress on the valve and
	vessel. Safety and relief valves shall not discharge so as to be a hazard, a potential caus
	e of damage or otherwise a
	nuisance.
	Discharge of hazardous materials must be properly contained in a method approved by the department.
	High
	-
	pressure
	-
	steam safety valves shall be vented to the outside of the structure. Where a low
	-
	pressure safety valve
	or
	a relief valve discharges to the drainage system, the installation shall conform to the
	New York City
	Plumbing Code
	.
	1006.7 Boiler safety devices.
	Boilers shall be equipped with controls and limit devices as required by the manufac-
	turer’s instructions and
	the conditions of the listing.
	1006.8 Electrical requirements.
	The power supply to the electrical control system shall be from a two
	-
	wire branch
	circuit
	that has a grounded conductor, or from an isolation
	trans
	-
	former
	with a two
	-
	wire secondary. Where an i
	solation
	transformer is provided, one conductor of the secondary
	winding
	shall be grounded. Control voltage shall not exceed
	150 volts nominal, line to line. Control and limit devices shall
	interrupt
	the ungrounded side of the circuit. A means
	of manually
	disconnecting the control circuit shall be provided and controls shall be arranged so that when deener-
	gized, the burner shall be inoperative. Such disconnecting means shall be capable of being locked in the off position
	and shall be provided with ready acc
	ess.
	1006.8.1 Remote control (shutdown).
	A remote control shall be provided to stop the flow of oil and/or gas and
	combustion air to any burner or fuel
	-
	burning internal combustion equipment. Such a control shall be provided
	along every means of egress from
	the room in which the burner or equipment is located. Each remote control shall
	be located outside of, but as close as practicable to the burner or equipment room itself and shall be labeled:
	“REMOTE CONTROL FOR BURNER.”
	Exception:
	Where an outside locati
	on is impracticable, the remote control shutdown may be provided immedi-
	ately inside the room in which the burner or equipment is located.
	Such location must be accessible at all times.
	1006.9 Carbon monoxide detectors.
	Carbon monoxide detectors shall be p
	rovided in all fuel
	-
	fired appliance rooms
	to detect the level of carbon monoxide in the room and signal an alarm. Such detectors shall be listed and installed
	in accordance with Chapter 9 of the
	New York City Building Code
	.
	SECTION
	MC
	1007
	BOILER
	LOW
	-
	WATER CUTOFF
	1007.1 General.
	Steam and hot water boilers shall be protected with
	dual
	low
	-
	water cutoff control, with each control
	independently piped to the pressure vessel in accordance with ASME CSD
	-
	1. For hydronic boilers, the low
	-
	water cut
	out may
	be located in the supply piping above the boiler before any intervening valve. A flow
	-
	sensing control installed
	in accordance with ASME CSD
	-
	1 shall be considered a low
	-
	water cutoff for the purposes of this section.
	Exception:
	Hot water
	boilers
	located wit
	hin a dwelling unit supplying only
	that
	unit and having a total heat input
	of
	less than 400,000 Btu/h (117.2 kW) may be
	protected
	by only one low
	-
	water cutoff
	control.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1007.2 Operation.
	Low
	-
	water cutoff controls and flow
	-
	sensing controls required by Section 1007.1 shall automati-
	cally stop the combustion operation of the appliance when the water level drops below the lowest safe water level as
	established by the manufacturer
	and in accordance with ASME CSD
	-
	1,
	or when water circulation stops, respectively.
	10
	07.3 Low
	-
	water cut out maintenance and testing.
	Low
	-
	water cut outs shall be maintained in accordance with
	ASME CSD
	-
	1 and the manufacturer’s specifications. An operator shall test low
	-
	water cut outs as follows: (1) high
	pressure steam boilers every shift, (
	2) low pressure steam boilers daily and (3) hot water boilers monthly. Slow drain
	tests shall be conducted for steam boilers every six months.
	Every year, low
	-
	water cut outs and associated piping for
	steam boilers shall be opened, cleaned and inspected.
	Re
	cords of all testing, cleaning, and inspection required by this
	section shall be maintained, and made available to the department upon request.
	SECTION MC 1008
	BOILER BLOWOFF/BLOWDOWN VALVES
	1008.1 General.
	Every boiler
	shall be equipped with blowoff
	/blow
	down
	valve(s). The valve(s) shall be installed in
	the
	openings
	provided on the boiler. The minimum
	quantity and
	size of the valve(s) and associated piping shall be the
	quantity and
	size specified by the boiler manufacturer or the
	quantity and size of the boiler blowoff
	/blowdown
	valve
	opening. Where the maximum allowable working pressure of the boiler exceeds 15 psig (103.4 kPa), two bottom
	blowoff valves shall be provided consisting
	of either two slow
	-
	opening valves in series or one quick
	-
	opening valve
	and one slow
	-
	opening valve in series, with the quick
	-
	opening valve installed closest to the boiler.
	1008.2 Discharge.
	Blowoff
	/blowdown
	valves shall discharge to a safe place of disposal. Where discharging to the
	drainage system, the installation shall conform to the
	New York City
	Plumbing Code.
	1008.3 Maintenance.
	Blowdown lines shall be inspected annually to verify they are free of deposits and in good
	working condition.
	SECTION MC 1009
	HOT WATER BOILER EXPANSION TANK
	1009.1 Where required.
	An expansion tank shall be installed in every hot water system. For multiple boiler installa-
	tions, not less than one expansion tank is required. Expansion tanks shall be of the closed or open type. Tanks shall
	be rated for the pressure of the hot water system.
	Lockable shutoff valves shall be installed at connections to all
	expansion tanks. Valves shall remain locked in the open position.
	1009.2 Closed
	-
	type expansion tanks.
	Closed
	-
	type expansion tanks shall be installed in accordance with the manu-
	facturer’s instructions. Expansion tanks for systems designed to have an operating pressure in excess of 30 psi (205.8
	kPa) shall be constructed and certified in accordance with the
	ASME Boiler and Pressure Vessel Code
	. The size of the
	tank shall be based on the capacity of the hot
	-
	water
	-
	heating system. The minimum size of the tank shall be determined
	in accordance with the following equation where all necessary
	information is known:
	V
	t
	=
	(
	0
	.
	00041T
	−0
	.
	0466
	)
	V
	s
	�
	P
	a
	P
	f
	�
	−�
	P
	a
	P
	o
	�
	(Equation 10
	-
	1)
	For SI:
	V
	t
	=
	(
	0.
	000738T
	−
	0.
	03348
	)
	V
	s
	�
	P
	a
	P
	f
	�−�
	P
	a
	P
	o
	�
	where:
	V
	t
	=
	Minimum volume of tanks (gallons) (L).
	V
	s
	=
	Volume of system, not including expansion tanks
	(gallons) (L).
	T
	=
	Average operating temperature (
	°
	F) (
	°
	C).
	P
	a
	=
	Atmospheric pressure (psi) (kPa).
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	P
	f
	=
	Fill pressure (psi) (kPa).
	P
	o
	=
	Maximum operating pressure (psi) (kPa).
	Where all necessary information is not known, the minimum size of the tank shall be
	determined from Table 1009.2.
	TABLE 1009.2
	CLOSED
	-
	TYPE EXPANSION TANK SIZING
	SYSTEM VOLUME
	IN GALLONS
	TANK CAPACITIES IN GALLONS
	Pressurized
	Diaphragm Type
	Nonpressurized
	Type
	100
	9
	15
	200
	17
	30
	300
	25
	45
	400
	33
	60
	500
	42
	75
	1,000
	83
	150
	2,000
	165
	300
	For SI: 1 gallon = 3.795 L.
	1009.3 Open
	-
	type expansion tanks.
	Open
	-
	type expansion tanks shall be located not less than 4 feet (1219.2 mm)
	above the highest heating element. The tank shall be adequately sized for the hot water system. An overflow with a
	minimum
	diameter
	of 1 inch (25.4 mm) shall be installed at the to
	p of the tank. The overflow shall discharge to the
	drainage system in
	accordance
	with the
	New York City
	Plumbing Code.
	SECTION MC 1010
	GAUGES
	1010.1 Hot water boiler gauges.
	Every hot water boiler shall have a pressure gauge and a temperature gauge, or a
	c
	ombination pressure and temperature gauge. The gauges shall indicate the temperature and pressure within the normal
	range of the system’s operation.
	1010.2 Steam boiler gauges.
	Every steam boiler shall have a water
	-
	gauge glass and a pressure gauge with a s
	iphon.
	The pressure gauge shall indicate the pressure within the normal range of the system’s operation.
	1010.2.1 Water
	-
	gauge glass.
	The gauge glass shall be installed in accordance with the
	ASME Boiler and Pressure
	Vessel Code
	or ASME CSD
	-
	1.
	SECTION MC 1011
	TESTS
	1011.1 Tests.
	Upon completion of the assembly and
	installation
	of boilers and pressure vessels, acceptance tests shall
	be conducted in accordance with the requirements of the
	ASME Boiler and Pressure Vessel Code
	. Boilers shall not
	be placed in operation upon completion of construction until they have been inspected
	a
	nd
	tested and a certificate of
	compliance has been issued by the commissioner. All final inspections and
	tests
	for boilers shall be witnessed by a
	qualified boiler inspector in the employ of the department or a duly authorized insurance company as provided
	in
	Section 204 of the Labor Law of the State of New York. Equipment having an input of not more than 350,000 Btu/h
	(103 kW) shall be exempt from this requirement. Where field assembly of pressure vessels or boilers is required, a
	copy of
	the completed H
	-
	2
	, P
	-
	2 or U
	-
	1 Manufacturer’s Data Report and the completed Appendix C of ASME CSD
	-
	1
	required by the
	ASME Boiler and Pressure Vessel Code
	shall be submitted to the
	department
	.
	1011.1.1 Fitness for service.
	When a boiler or pressure vessel has exceeded its us
	eful life or has been subjected to
	an event that may have impacted the integrity of the pressure vessel, the department may require that a fitness for
	service study be completed. The study shall be completed in accordance with the
	National Board Inspection
	Code
	Part 2, Section 4, and documented in accordance with the National Board 403 form.
	‡‡‡ Chapter 10 was amended by
	Local Law
	77
	of 2023
	. This law has an effective
	date of June 10, 2023.
	CHAPTER 10
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	SECTION MC 1001
	GENERAL
	1001.1 Scope.
	This chapter
	shall establish the minimum safety requirements for and
	shall govern the installation,
	alteration and repair of boilers, wate
	r heaters and pressure vessels.
	Exceptions:
	1.
	Pressure vessels used for unheated water supply.
	2.
	Portable unfired pressure vessels and Interstate
	Commerce
	Commission containers.
	3.
	Containers for bulk oxygen and medical gas.
	4.
	Unfired pressure
	vessels having a volume of 5 cubic feet (0.14 m
	3
	) or less operating at pressures not exceed-
	ing 250 pounds per square inch (psi) (1723.7 kPa) and located within occupancies of Groups B, F, H, M, R,
	S and U.
	5.
	Pressure vessels used in refrigeration systems
	that are regulated by Chapter 11.
	6.
	Pressure tanks used in conjunction with coaxial cables, telephone cables, power cables and other
	similar
	humidity control systems.
	7.
	Any boiler or pressure vessel subject to inspection by federal inspectors.
	1001.2 The
	rmal safety (spill) switches.
	Thermal safety (spill) switches shall be installed in accordance with Section
	801.23.3.
	1001.3 Clearances.
	Minimum clearances at
	boilers, water heaters and pressure vessels shall be maintained in accord-
	ance with Chapter 3.
	SEC
	TION MC 1002
	WATER HEATERS
	1002.1 General.
	Potable water heaters and hot water storage tanks shall be listed and labeled and installed in accord-
	ance with the manufacturer’s instructions, the
	New York City
	Plumbing Code
	and this code. All water heaters shal
	l be
	capable of being removed without first removing a permanent portion of the building structure. The potable water
	connections
	and relief valves for all water heaters shall conform to the requirements of the
	New York City
	Plumbing
	Code
	. Domestic electric water heaters shall comply with UL 174 or UL 1453. Commercial electric water heaters shall
	comply with UL 1453. Oil
	-
	fired water heaters shall comply with UL 732. Approval for oil
	-
	fired water heaters
	350,000
	Btu/h input (103 kW) and above shall be obtained from the New York City Department of Environmental Protection.
	Thermal solar water heaters shall comply with UL 174 or UL 1453, and Chapter 14 of this code. Heat pump water
	heaters shall comply with UL 174 or UL 1995.
	1002.2 Water heaters utilized for s
	pace heating.
	Water heaters utilized both to supply potable hot water and provide
	hot water for space
	-
	heating applications shall be listed and labeled for such applications by the manufacturer and shall
	be
	built in accordance with Section IV of the
	ASME
	Boiler and Pressure Vessel Code
	with an “H” code stamp. Water
	heaters shall be
	installed in accordance with the manufacturer’s instructions
	, the
	ASME Boiler and Pressure Vessel
	Code
	and the
	New York City
	Plumbing Code.
	Oil
	-
	fired heaters shall comply with U
	L 732 and shall have an “HW”
	stamp.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1002.2.1 Sizing.
	Water heaters utilized for both potable water heating and space
	-
	heating applications shall be sized
	to prevent the space
	-
	heating load from diminishing the required potable water
	-
	heating capacity.
	1002.2.
	2 Temperature limitation.
	Where a combination potable water
	-
	heating and space
	-
	heating system requires
	water for space heating, a temperature
	actuated mixing valve complying with ASSE 1017 shall be provided to
	temper the water supplied to the potable hot wa
	ter distribution system in accordance with Section 607 of the
	New
	York City Plumbing Code
	.
	1002.2.3 Cross
	-
	connection.
	Water heaters utilized for both potable hot water and hot water for space
	-
	heating
	applications shall have separate heating sections and co
	nnections for distribution systems and shall not be cross
	-
	connected. The potability of the domestic water shall be maintained throughout the system in accordance with the
	New York City Plumbing Code.
	1002.3 Supplemental water
	-
	heating devices.
	Potable
	water
	-
	heating devices that utilize refrigerant
	-
	to
	-
	water heat
	exchangers shall be approved and installed in accordance with the
	New York City
	Plumbing Code
	, the applicable
	provisions of the
	New York City Energy Conservation Code
	and the manufacturer’s
	instructions.
	SECTION MC 1003
	PRESSURE VESSELS
	1003.1 General.
	All pressure vessels shall be constructed and certified in accordance with the
	ASME Boiler and
	Pressure Vessel Code
	, and shall
	bear the label of an approved agency. Pressure vessels shall
	be in
	stalled in accordance
	with the manufacturer’s
	instructions and nationally recognized standards. Directly fired pressure vessels shall meet
	the requirements of Section 1004.
	1003.2 Piping.
	All piping materials, fittings, joints,
	connections
	and devices asso
	ciated with systems utilized in
	con-
	junction
	with pressure vessels shall be designed for the specific application and shall
	comply with the
	ASME Boiler
	and Pressure Vessel Code
	and this code
	.
	1003.3 Welding.
	Welding on pressure vessels shall be performed by
	welders
	certified in
	compliance with nationally
	recognized standards, including the
	National Board Inspection Code
	and
	ASME Boiler and Pressure Vessel Code
	,
	Section
	IX. Such welders shall also comply with 12 NYCRR 4
	-
	6.2, and 12 NYCRR 14
	-
	3.3 through 14
	-
	3.1
	8.
	SECTION
	MC
	1004
	BOILERS
	1004.1 Standards.
	Boilers shall be designed, constructed and certified in accordance with the
	ASME Boiler and Pres-
	sure Vessel Code
	, Section I or IV, and 12 NYCRR Parts 4 and 14. Controls and safety devices for boilers with
	fuel
	input ratings of 12,500,000 Btu/h (3663 kW) or less shall meet the requirements of ASME CSD
	-
	1. Controls and safety
	devices for boilers with inputs greater than 12,500,000 Btu/h (3663 kW) shall meet the requirements of NFPA 85.
	Packaged oil
	-
	fired boile
	rs shall be listed and labeled in accordance with UL 726. Packaged electric boilers shall be
	listed and labeled in accordance with UL 834.
	Approval for oil
	-
	fired boilers 350,000 Btu/h input (102.6 kW) and
	above shall be obtained from the New York City Depa
	rtment of Environmental Protection.
	1004.1.1 Field erected boilers requirements.
	Field erected boiler installations shall comply with the following
	:
	1.
	The vessel erector shall hold the appropriate ASME stamp for vessel construction.
	2.
	The licensed instal
	ler is responsible for the installation of all controls and burners which shall be designed
	and constructed in accordance with the requirements of ASME CSD
	-
	1 and, as applicable, the
	ASME Boiler
	and Pressure Vessel Code
	, 12 NYCRR Parts 4 and 14, and NFPA 85
	.
	3.
	The New York City Department of Environmental Protection shall approve the installation of the boiler and
	burner for compatibility, controls and safety devices.
	4.
	Boiler vessels shall comply with one of the following listings:
	4.1.
	UL 726 or UL 795 a
	s applicable; or
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	4.2.
	UL 2106.
	Exception:
	Unlisted equipment shall obtain approval from the department.
	5.
	Controls and safety devices shall be tested and inspected in accordance with ASME CSD
	-
	1 and, as applicable,
	the
	ASME Boiler and Pressure Vessel Code
	,
	12 NYCRR Parts 4 and 14, and NFPA 85. Testing and inspection
	shall be performed by the burner manufacturer’s authorized representative in the presence of the licensed
	installer.
	6.
	Inspection of the installed boiler assembly shall be performed by the dep
	artment.
	1004.2 Installation.
	In addition to the requirements of this code, the installation of boilers shall conform to the
	man-
	ufacturer’s
	instructions. Operating instructions of a permanent type shall be
	located in
	the boiler
	room and readily
	accessible
	.
	Boilers shall have all controls set, adjusted and tested by the installer. The manufacturer’s rating data and
	the nameplate shall be attached to the boiler.
	1004.3 Working clearance.
	Clearances shall be maintained around boilers, generators, heaters, tanks and related
	equipment and appliances so as to permit inspection, servicing, repair, replacement and visibility of all gauges. When
	boilers are installed or replaced, clearance shall
	be provided to allow access for maintenance and repair
	per the boiler’s
	listing and manufacturer’s instructions.
	Passageways
	for inspection
	around all sides of boilers shall have an unob-
	structed width of not less than 18 inches
	(
	457.2
	mm)
	unless
	the boiler
	’s listing or department approval or manufac-
	turer’s instructions state
	otherwise.
	1004.3.1 Top clearance.
	Clearances from the tops of boilers to the ceiling or other overhead obstruction shall be
	in accordance with Table 1004.3.1.
	TABLE 1004.3.1
	BOILER TOP
	CLEARANCES
	BOILER TYPE
	MINIMUM
	CLEARANCES FROM
	TOP OF BOILER TO
	CEILING OR OTHER
	OVERHEAD
	OBSTRUCTION (feet)
	All boilers with manholes on top of the
	boiler except where a greater clearance is
	required in this table.
	3
	All boilers without
	manholes on top of
	the boiler except high
	-
	pressure steam
	boilers and where a greater clearance is
	required in this table.
	2
	High
	-
	pressure steam boilers with steam
	generating capacity not exceeding 5,000
	pounds per hour.
	3
	High
	-
	pressure steam
	boilers with steam
	generating capacity exceeding 5,000
	pounds per hour.
	7
	High
	-
	pressure steam boilers having heat-
	ing surface not exceeding 1,000 square
	feet.
	3
	High
	-
	pressure steam boilers having heat-
	ing surface in excess of 1,000 square
	feet.
	7
	High
	-
	pressure steam boilers with input
	not exceeding 5,000,000 Btu/h.
	3
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	High
	-
	pressure steam boilers with input in
	excess of 5,000,000 Btu/h.
	7
	Steam
	-
	heating boilers and hot water
	-
	heating boilers with input exceeding
	5,000,000 Btu/h.
	3
	Steam
	-
	heating boilers exceeding 5,000
	pounds of steam per hour.
	3
	Steam
	-
	heating boilers and hot water
	-
	heating boilers having heating surface
	exceeding 1,000 square feet.
	3
	For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m
	2
	, 1 pound per hour = 0.4536
	kg/h, 1 Btu/hr = 0.293 W.
	1004.4 Mounting.
	Equipment
	and appliances
	shall be set or mounted on a level base capable of supporting and dis-
	tributing the weight contained thereon. Boilers, tanks and equipment shall be
	securely anchored to the structure.
	Equ
	ipment and appliances requiring vibration isolation shall be installed as designed by a registered design profes-
	sional
	in accordance with the manufacturer’s instructions.
	1004.5 Floors.
	Boilers shall be mounted on floors of noncombustible
	construction, unless listed for mounting on
	combustible flooring. Vibration isolation shall be in accordance with Section 313. In buildings with residential occu-
	pancies, boilers shall be installed in accordance with the requirements of Section 313.
	1004.6
	Boiler rooms and enclosures.
	Boiler rooms and enclosures and access thereto shall comply with Chapters 5
	and 10 of the
	New York City
	Building Code
	and Chapter 3 of this code. Boiler rooms shall be equipped with a floor
	drain or other approved means for
	disposing
	of liquid waste
	in accordance with the
	New York City Plumbing Code
	.
	1004.7 Operating adjustments and instructions.
	Hot water and steam boil
	ers shall have all operating and safety
	controls set and operationally tested by the installing contractor. A
	complete
	control diagram and boiler operating
	instructions shall be furnished by the installer for each installation.
	A complete control diagram o
	f a permanent type
	shall be located in the boiler room and shall be readily accessible.
	1004.8 Burner controls.
	Gas and oil modulating burners shall be provided with burner controls (oil and gas equiv-
	alent ratings) in accordance with ASME CSD
	-
	1 and NFPA 85
	.
	1004.9 Conversion burners.
	Conversion burners shall be installed in accordance with ANSI Z21.8.
	SECTION MC 1005
	BOILER CONNECTIONS
	1005.1 Valves.
	Every boiler or modular boiler shall have a shutoff valve in the supply and return piping. For multiple
	boil
	er or multiple modular boiler installations, each boiler or modular boiler shall have individual shutoff valves in
	the
	supply
	and return piping.
	Exception:
	Shutoff valves are not required in a system
	having
	a single low
	-
	pressure steam boiler
	of 350,000 Btu
	/h
	(103 kW) output or less
	.
	1005.2 Potable water supply.
	The water supply to all boilers, including but not limited to backflow prevention, shall
	be connected in accordance with the
	New
	York City
	Plumbing Code
	.
	SECTION MC 1006
	SAFETY AND PRESSURE
	RELIEF VALVES
	AND CONTROLS
	1006.1 Safety valves for steam boilers.
	Steam boilers shall be protected with a safety valve
	in accordance with the
	ASME Boiler and Pressure Vessel Code
	or ASME CSD
	-
	1.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1006.2 Safety relief valves for hot water boilers.
	Hot water
	boilers shall be protected with a safety relief valve
	in
	accordance with the
	ASME Boiler and Pressure Vessel Code
	or ASME CSD
	-
	1
	.
	1006.3 Pressure relief for pressure vessels.
	Pressure vessels
	shall be protected with a pressure relief valve or
	pres-
	sure
	-
	limit
	ing device as required by the manufacturer’s instructions for the pressure vessel and
	in accordance with the
	ASME Boiler and Pressure Vessel Code
	or ASME CSD
	-
	1.
	1006.4 Standards of safety and safety relief valves.
	Safety and safety relief valves shall be l
	isted and labeled, and
	shall have a minimum rated capacity for the equipment or appliances served. Safety and safety relief valves shall be
	set at not greater than the nameplate pressure rating of the boiler or pressure vessel and shall be in accordance wi
	th
	the
	ASME Boiler and Pressure Vessel Code
	or the ASME CSD
	-
	1
	.
	1006.5 Installation.
	Safety or relief valves shall be installed directly into the safety or relief valve opening on the
	boiler or pressure vessel. Valves shall not be located on either side of a safety or relief valve connection. The relief
	valve drain shall
	discharge by gravi
	ty to a nonhazardous point of discharge without obstruction.‡
	1006.6 Safety and relief valve discharge.
	Safety and relief valve discharge pipes shall be of rigid pipe that is approved
	for the temperature of the system. The discharge pipe shall
	, at a minimu
	m,
	be the same diameter as the safety or relief
	valve outlet. Safety and relief valve discharge pipes shall be properly supported to prevent stress on the valve and
	vessel. Safety and relief valves shall not discharge so as to be a hazard, a potential caus
	e of damage or otherwise a
	nuisance.
	Discharge of hazardous materials must be properly contained in a method approved by the department.
	High
	-
	pressure
	-
	steam safety valves shall be vented to the outside of the structure. Where a low
	-
	pressure safety valve
	or
	a relief valve discharges to the drainage system, the installation shall conform to the
	New York City
	Plumbing Code
	.
	1006.7 Boiler safety devices.
	Boilers shall be equipped with controls and limit devices as required by the manufac-
	turer’s instructions and
	the conditions of the listing.
	1006.8 Electrical requirements.
	The power supply to the electrical control system shall be from a two
	-
	wire branch
	circuit
	that has a grounded conductor, or from an isolation
	trans
	-
	former
	with a two
	-
	wire secondary. Where an i
	solation
	transformer is provided, one conductor of the secondary
	winding
	shall be grounded. Control voltage shall not exceed
	150 volts nominal, line to line. Control and limit devices shall
	interrupt
	the ungrounded side of the circuit. A means
	of manually
	disconnecting the control circuit shall be provided and controls shall be arranged so that when deener-
	gized, the burner shall be inoperative. Such disconnecting means shall be capable of being locked in the off position
	and shall be provided with ready acc
	ess.
	1006.8.1 Remote control (shutdown).
	A remote control shall be provided to stop the flow of oil and/or gas and
	combustion air to any burner or fuel
	-
	burning internal combustion equipment. Such a control shall be provided
	along every means of egress from
	the room in which the burner or equipment is located. Each remote control shall
	be located outside of, but as close as practicable to the burner or equipment room itself and shall be labeled:
	“REMOTE CONTROL FOR BURNER.”
	Exception:
	Where an outside locati
	on is impracticable, the remote control shutdown may be provided immedi-
	ately inside the room in which the burner or equipment is located.
	Such location must be accessible at all times.
	1006.9 Carbon monoxide detectors.
	Carbon monoxide detectors shall be p
	rovided in all fuel
	-
	fired appliance rooms
	to detect the level of carbon monoxide in the room and signal an alarm. Such detectors shall be listed and installed
	in accordance with Chapter 9 of the
	New York City Building Code
	.
	SECTION
	MC
	1007
	BOILER
	LOW
	-
	WATER CUTOFF
	1007.1 General.
	Steam and hot water boilers shall be protected with
	dual
	low
	-
	water cutoff control, with each control
	independently piped to the pressure vessel in accordance with ASME CSD
	-
	1. For hydronic boilers, the low
	-
	water cut
	out may
	be located in the supply piping above the boiler before any intervening valve. A flow
	-
	sensing control installed
	in accordance with ASME CSD
	-
	1 shall be considered a low
	-
	water cutoff for the purposes of this section.
	Exception:
	Hot water
	boilers
	located wit
	hin a dwelling unit supplying only
	that
	unit and having a total heat input
	of
	less than 400,000 Btu/h (117.2 kW) may be
	protected
	by only one low
	-
	water cutoff
	control.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1007.2 Operation.
	Low
	-
	water cutoff controls and flow
	-
	sensing controls required by Section 1007.1 shall automati-
	cally stop the combustion operation of the appliance when the water level drops below the lowest safe water level as
	established by the manufacturer
	and in accordance with ASME CSD
	-
	1,
	or when water circulation stops, respectively.
	10
	07.3 Low
	-
	water cut out maintenance and testing.
	Low
	-
	water cut outs shall be maintained in accordance with
	ASME CSD
	-
	1 and the manufacturer’s specifications. An operator shall test low
	-
	water cut outs as follows: (1) high
	pressure steam boilers every shift, (
	2) low pressure steam boilers daily and (3) hot water boilers monthly. Slow drain
	tests shall be conducted for steam boilers every six months.
	Every year, low
	-
	water cut outs and associated piping for
	steam boilers shall be opened, cleaned and inspected.
	Re
	cords of all testing, cleaning, and inspection required by this
	section shall be maintained, and made available to the department upon request.
	SECTION MC 1008
	BOILER BLOWOFF/BLOWDOWN VALVES
	1008.1 General.
	Every boiler
	shall be equipped with blowoff
	/blow
	down
	valve(s). The valve(s) shall be installed in
	the
	openings
	provided on the boiler. The minimum
	quantity and
	size of the valve(s) and associated piping shall be the
	quantity and
	size specified by the boiler manufacturer or the
	quantity and size of the boiler blowoff
	/blowdown
	valve
	opening. Where the maximum allowable working pressure of the boiler exceeds 15 psig (103.4 kPa), two bottom
	blowoff valves shall be provided consisting
	of either two slow
	-
	opening valves in series or one quick
	-
	opening valve
	and one slow
	-
	opening valve in series, with the quick
	-
	opening valve installed closest to the boiler.
	1008.2 Discharge.
	Blowoff
	/blowdown
	valves shall discharge to a safe place of disposal. Where discharging to the
	drainage system, the installation shall conform to the
	New York City
	Plumbing Code.
	1008.3 Maintenance.
	Blowdown lines shall be inspected annually to verify they are free of deposits and in good
	working condition.
	SECTION MC 1009
	HOT WATER BOILER EXPANSION TANK
	1009.1 Where required.
	An expansion tank shall be installed in every hot water system. For multiple boiler installa-
	tions, not less than one expansion tank is required. Expansion tanks shall be of the closed or open type. Tanks shall
	be rated for the pressure of the hot water system.
	Lockable shutoff valves shall be installed at connections to all
	expansion tanks. Valves shall remain locked in the open position.
	1009.2 Closed
	-
	type expansion tanks.
	Closed
	-
	type expansion tanks shall be installed in accordance with the manu-
	facturer’s instructions. Expansion tanks for systems designed to have an operating pressure in excess of 30 psi (205.8
	kPa) shall be constructed and certified in accordance with the
	ASME Boiler and Pressure Vessel Code
	. The size of the
	tank shall be based on the capacity of the hot
	-
	water
	-
	heating system. The minimum size of the tank shall be determined
	in accordance with the following equation where all necessary
	information is known:
	V
	t
	=
	(
	0
	.
	00041T
	−0
	.
	0466
	)
	V
	s
	�
	P
	a
	P
	f
	�
	−�
	P
	a
	P
	o
	�
	(Equation 10
	-
	1)
	For SI:
	V
	t
	=
	(
	0.
	000738T
	−
	0.
	03348
	)
	V
	s
	�
	P
	a
	P
	f
	�−�
	P
	a
	P
	o
	�
	where:
	V
	t
	=
	Minimum volume of tanks (gallons) (L).
	V
	s
	=
	Volume of system, not including expansion tanks
	(gallons) (L).
	T
	=
	Average operating temperature (
	°
	F) (
	°
	C).
	P
	a
	=
	Atmospheric pressure (psi) (kPa).
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	P
	f
	=
	Fill pressure (psi) (kPa).
	P
	o
	=
	Maximum operating pressure (psi) (kPa).
	Where all necessary information is not known, the minimum size of the tank shall be
	determined from Table 1009.2.
	TABLE 1009.2
	CLOSED
	-
	TYPE EXPANSION TANK SIZING
	SYSTEM VOLUME
	IN GALLONS
	TANK CAPACITIES IN GALLONS
	Pressurized
	Diaphragm Type
	Nonpressurized
	Type
	100
	9
	15
	200
	17
	30
	300
	25
	45
	400
	33
	60
	500
	42
	75
	1,000
	83
	150
	2,000
	165
	300
	For SI: 1 gallon = 3.795 L.
	1009.3 Open
	-
	type expansion tanks.
	Open
	-
	type expansion tanks shall be located not less than 4 feet (1219.2 mm)
	above the highest heating element. The tank shall be adequately sized for the hot water system. An overflow with a
	minimum
	diameter
	of 1 inch (25.4 mm) shall be installed at the to
	p of the tank. The overflow shall discharge to the
	drainage system in
	accordance
	with the
	New York City
	Plumbing Code.
	SECTION MC 1010
	GAUGES
	1010.1 Hot water boiler gauges.
	Every hot water boiler shall have a pressure gauge and a temperature gauge, or a
	c
	ombination pressure and temperature gauge. The gauges shall indicate the temperature and pressure within the normal
	range of the system’s operation.
	1010.2 Steam boiler gauges.
	Every steam boiler shall have a water
	-
	gauge glass and a pressure gauge with a s
	iphon.
	The pressure gauge shall indicate the pressure within the normal range of the system’s operation.
	1010.2.1 Water
	-
	gauge glass.
	The gauge glass shall be installed in accordance with the
	ASME Boiler and Pressure
	Vessel Code
	or ASME CSD
	-
	1.
	SECTION MC 1011
	TESTS
	1011.1 Tests.
	Upon completion of the assembly and
	installation
	of boilers and pressure vessels, acceptance tests shall
	be conducted in accordance with the requirements of the
	ASME Boiler and Pressure Vessel Code
	. Boilers shall not
	be placed in operation upon completion of construction until they have been inspected
	a
	nd
	tested and a certificate of
	compliance has been issued by the commissioner. All final inspections and
	tests
	for boilers shall be witnessed by a
	qualified boiler inspector in the employ of the department or a duly authorized insurance company as provided
	in
	Section 204 of the Labor Law of the State of New York. Equipment having an input of not more than 350,000 Btu/h
	(103 kW) shall be exempt from this requirement. Where field assembly of pressure vessels or boilers is required, a
	copy of
	the completed H
	-
	2
	, P
	-
	2 or U
	-
	1 Manufacturer’s Data Report and the completed Appendix C of ASME CSD
	-
	1
	required by the
	ASME Boiler and Pressure Vessel Code
	shall be submitted to the
	department
	.
	1011.1.1 Fitness for service.
	When a boiler or pressure vessel has exceeded its us
	eful life or has been subjected to
	an event that may have impacted the integrity of the pressure vessel, the department may require that a fitness for
	service study be completed. The study shall be completed in accordance with the
	National Board Inspection
	Code
	Part 2, Section 4, and documented in accordance with the National Board 403 form.
	‡‡‡ Chapter 10 was amended by
	Local Law
	77
	of 2023
	. This law has an effective
	date of June 10, 2023.
	CHAPTER 10
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	SECTION MC 1001
	GENERAL
	1001.1 Scope.
	This chapter
	shall establish the minimum safety requirements for and
	shall govern the installation,
	alteration and repair of boilers, wate
	r heaters and pressure vessels.
	Exceptions:
	1.
	Pressure vessels used for unheated water supply.
	2.
	Portable unfired pressure vessels and Interstate
	Commerce
	Commission containers.
	3.
	Containers for bulk oxygen and medical gas.
	4.
	Unfired pressure
	vessels having a volume of 5 cubic feet (0.14 m
	3
	) or less operating at pressures not exceed-
	ing 250 pounds per square inch (psi) (1723.7 kPa) and located within occupancies of Groups B, F, H, M, R,
	S and U.
	5.
	Pressure vessels used in refrigeration systems
	that are regulated by Chapter 11.
	6.
	Pressure tanks used in conjunction with coaxial cables, telephone cables, power cables and other
	similar
	humidity control systems.
	7.
	Any boiler or pressure vessel subject to inspection by federal inspectors.
	1001.2 The
	rmal safety (spill) switches.
	Thermal safety (spill) switches shall be installed in accordance with Section
	801.23.3.
	1001.3 Clearances.
	Minimum clearances at
	boilers, water heaters and pressure vessels shall be maintained in accord-
	ance with Chapter 3.
	SEC
	TION MC 1002
	WATER HEATERS
	1002.1 General.
	Potable water heaters and hot water storage tanks shall be listed and labeled and installed in accord-
	ance with the manufacturer’s instructions, the
	New York City
	Plumbing Code
	and this code. All water heaters shal
	l be
	capable of being removed without first removing a permanent portion of the building structure. The potable water
	connections
	and relief valves for all water heaters shall conform to the requirements of the
	New York City
	Plumbing
	Code
	. Domestic electric water heaters shall comply with UL 174 or UL 1453. Commercial electric water heaters shall
	comply with UL 1453. Oil
	-
	fired water heaters shall comply with UL 732. Approval for oil
	-
	fired water heaters
	350,000
	Btu/h input (103 kW) and above shall be obtained from the New York City Department of Environmental Protection.
	Thermal solar water heaters shall comply with UL 174 or UL 1453, and Chapter 14 of this code. Heat pump water
	heaters shall comply with UL 174 or UL 1995.
	1002.2 Water heaters utilized for s
	pace heating.
	Water heaters utilized both to supply potable hot water and provide
	hot water for space
	-
	heating applications shall be listed and labeled for such applications by the manufacturer and shall
	be
	built in accordance with Section IV of the
	ASME
	Boiler and Pressure Vessel Code
	with an “H” code stamp. Water
	heaters shall be
	installed in accordance with the manufacturer’s instructions
	, the
	ASME Boiler and Pressure Vessel
	Code
	and the
	New York City
	Plumbing Code.
	Oil
	-
	fired heaters shall comply with U
	L 732 and shall have an “HW”
	stamp.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1002.2.1 Sizing.
	Water heaters utilized for both potable water heating and space
	-
	heating applications shall be sized
	to prevent the space
	-
	heating load from diminishing the required potable water
	-
	heating capacity.
	1002.2.
	2 Temperature limitation.
	Where a combination potable water
	-
	heating and space
	-
	heating system requires
	water for space heating, a temperature
	actuated mixing valve complying with ASSE 1017 shall be provided to
	temper the water supplied to the potable hot wa
	ter distribution system in accordance with Section 607 of the
	New
	York City Plumbing Code
	.
	1002.2.3 Cross
	-
	connection.
	Water heaters utilized for both potable hot water and hot water for space
	-
	heating
	applications shall have separate heating sections and co
	nnections for distribution systems and shall not be cross
	-
	connected. The potability of the domestic water shall be maintained throughout the system in accordance with the
	New York City Plumbing Code.
	1002.3 Supplemental water
	-
	heating devices.
	Potable
	water
	-
	heating devices that utilize refrigerant
	-
	to
	-
	water heat
	exchangers shall be approved and installed in accordance with the
	New York City
	Plumbing Code
	, the applicable
	provisions of the
	New York City Energy Conservation Code
	and the manufacturer’s
	instructions.
	SECTION MC 1003
	PRESSURE VESSELS
	1003.1 General.
	All pressure vessels shall be constructed and certified in accordance with the
	ASME Boiler and
	Pressure Vessel Code
	, and shall
	bear the label of an approved agency. Pressure vessels shall
	be in
	stalled in accordance
	with the manufacturer’s
	instructions and nationally recognized standards. Directly fired pressure vessels shall meet
	the requirements of Section 1004.
	1003.2 Piping.
	All piping materials, fittings, joints,
	connections
	and devices asso
	ciated with systems utilized in
	con-
	junction
	with pressure vessels shall be designed for the specific application and shall
	comply with the
	ASME Boiler
	and Pressure Vessel Code
	and this code
	.
	1003.3 Welding.
	Welding on pressure vessels shall be performed by
	welders
	certified in
	compliance with nationally
	recognized standards, including the
	National Board Inspection Code
	and
	ASME Boiler and Pressure Vessel Code
	,
	Section
	IX. Such welders shall also comply with 12 NYCRR 4
	-
	6.2, and 12 NYCRR 14
	-
	3.3 through 14
	-
	3.1
	8.
	SECTION
	MC
	1004
	BOILERS
	1004.1 Standards.
	Boilers shall be designed, constructed and certified in accordance with the
	ASME Boiler and Pres-
	sure Vessel Code
	, Section I or IV, and 12 NYCRR Parts 4 and 14. Controls and safety devices for boilers with
	fuel
	input ratings of 12,500,000 Btu/h (3663 kW) or less shall meet the requirements of ASME CSD
	-
	1. Controls and safety
	devices for boilers with inputs greater than 12,500,000 Btu/h (3663 kW) shall meet the requirements of NFPA 85.
	Packaged oil
	-
	fired boile
	rs shall be listed and labeled in accordance with UL 726. Packaged electric boilers shall be
	listed and labeled in accordance with UL 834.
	Approval for oil
	-
	fired boilers 350,000 Btu/h input (102.6 kW) and
	above shall be obtained from the New York City Depa
	rtment of Environmental Protection.
	1004.1.1 Field erected boilers requirements.
	Field erected boiler installations shall comply with the following
	:
	1.
	The vessel erector shall hold the appropriate ASME stamp for vessel construction.
	2.
	The licensed instal
	ler is responsible for the installation of all controls and burners which shall be designed
	and constructed in accordance with the requirements of ASME CSD
	-
	1 and, as applicable, the
	ASME Boiler
	and Pressure Vessel Code
	, 12 NYCRR Parts 4 and 14, and NFPA 85
	.
	3.
	The New York City Department of Environmental Protection shall approve the installation of the boiler and
	burner for compatibility, controls and safety devices.
	4.
	Boiler vessels shall comply with one of the following listings:
	4.1.
	UL 726 or UL 795 a
	s applicable; or
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	4.2.
	UL 2106.
	Exception:
	Unlisted equipment shall obtain approval from the department.
	5.
	Controls and safety devices shall be tested and inspected in accordance with ASME CSD
	-
	1 and, as applicable,
	the
	ASME Boiler and Pressure Vessel Code
	,
	12 NYCRR Parts 4 and 14, and NFPA 85. Testing and inspection
	shall be performed by the burner manufacturer’s authorized representative in the presence of the licensed
	installer.
	6.
	Inspection of the installed boiler assembly shall be performed by the dep
	artment.
	1004.2 Installation.
	In addition to the requirements of this code, the installation of boilers shall conform to the
	man-
	ufacturer’s
	instructions. Operating instructions of a permanent type shall be
	located in
	the boiler
	room and readily
	accessible
	.
	Boilers shall have all controls set, adjusted and tested by the installer. The manufacturer’s rating data and
	the nameplate shall be attached to the boiler.
	1004.3 Working clearance.
	Clearances shall be maintained around boilers, generators, heaters, tanks and related
	equipment and appliances so as to permit inspection, servicing, repair, replacement and visibility of all gauges. When
	boilers are installed or replaced, clearance shall
	be provided to allow access for maintenance and repair
	per the boiler’s
	listing and manufacturer’s instructions.
	Passageways
	for inspection
	around all sides of boilers shall have an unob-
	structed width of not less than 18 inches
	(
	457.2
	mm)
	unless
	the boiler
	’s listing or department approval or manufac-
	turer’s instructions state
	otherwise.
	1004.3.1 Top clearance.
	Clearances from the tops of boilers to the ceiling or other overhead obstruction shall be
	in accordance with Table 1004.3.1.
	TABLE 1004.3.1
	BOILER TOP
	CLEARANCES
	BOILER TYPE
	MINIMUM
	CLEARANCES FROM
	TOP OF BOILER TO
	CEILING OR OTHER
	OVERHEAD
	OBSTRUCTION (feet)
	All boilers with manholes on top of the
	boiler except where a greater clearance is
	required in this table.
	3
	All boilers without
	manholes on top of
	the boiler except high
	-
	pressure steam
	boilers and where a greater clearance is
	required in this table.
	2
	High
	-
	pressure steam boilers with steam
	generating capacity not exceeding 5,000
	pounds per hour.
	3
	High
	-
	pressure steam
	boilers with steam
	generating capacity exceeding 5,000
	pounds per hour.
	7
	High
	-
	pressure steam boilers having heat-
	ing surface not exceeding 1,000 square
	feet.
	3
	High
	-
	pressure steam boilers having heat-
	ing surface in excess of 1,000 square
	feet.
	7
	High
	-
	pressure steam boilers with input
	not exceeding 5,000,000 Btu/h.
	3
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	High
	-
	pressure steam boilers with input in
	excess of 5,000,000 Btu/h.
	7
	Steam
	-
	heating boilers and hot water
	-
	heating boilers with input exceeding
	5,000,000 Btu/h.
	3
	Steam
	-
	heating boilers exceeding 5,000
	pounds of steam per hour.
	3
	Steam
	-
	heating boilers and hot water
	-
	heating boilers having heating surface
	exceeding 1,000 square feet.
	3
	For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m
	2
	, 1 pound per hour = 0.4536
	kg/h, 1 Btu/hr = 0.293 W.
	1004.4 Mounting.
	Equipment
	and appliances
	shall be set or mounted on a level base capable of supporting and dis-
	tributing the weight contained thereon. Boilers, tanks and equipment shall be
	securely anchored to the structure.
	Equ
	ipment and appliances requiring vibration isolation shall be installed as designed by a registered design profes-
	sional
	in accordance with the manufacturer’s instructions.
	1004.5 Floors.
	Boilers shall be mounted on floors of noncombustible
	construction, unless listed for mounting on
	combustible flooring. Vibration isolation shall be in accordance with Section 313. In buildings with residential occu-
	pancies, boilers shall be installed in accordance with the requirements of Section 313.
	1004.6
	Boiler rooms and enclosures.
	Boiler rooms and enclosures and access thereto shall comply with Chapters 5
	and 10 of the
	New York City
	Building Code
	and Chapter 3 of this code. Boiler rooms shall be equipped with a floor
	drain or other approved means for
	disposing
	of liquid waste
	in accordance with the
	New York City Plumbing Code
	.
	1004.7 Operating adjustments and instructions.
	Hot water and steam boil
	ers shall have all operating and safety
	controls set and operationally tested by the installing contractor. A
	complete
	control diagram and boiler operating
	instructions shall be furnished by the installer for each installation.
	A complete control diagram o
	f a permanent type
	shall be located in the boiler room and shall be readily accessible.
	1004.8 Burner controls.
	Gas and oil modulating burners shall be provided with burner controls (oil and gas equiv-
	alent ratings) in accordance with ASME CSD
	-
	1 and NFPA 85
	.
	1004.9 Conversion burners.
	Conversion burners shall be installed in accordance with ANSI Z21.8.
	SECTION MC 1005
	BOILER CONNECTIONS
	1005.1 Valves.
	Every boiler or modular boiler shall have a shutoff valve in the supply and return piping. For multiple
	boil
	er or multiple modular boiler installations, each boiler or modular boiler shall have individual shutoff valves in
	the
	supply
	and return piping.
	Exception:
	Shutoff valves are not required in a system
	having
	a single low
	-
	pressure steam boiler
	of 350,000 Btu
	/h
	(103 kW) output or less
	.
	1005.2 Potable water supply.
	The water supply to all boilers, including but not limited to backflow prevention, shall
	be connected in accordance with the
	New
	York City
	Plumbing Code
	.
	SECTION MC 1006
	SAFETY AND PRESSURE
	RELIEF VALVES
	AND CONTROLS
	1006.1 Safety valves for steam boilers.
	Steam boilers shall be protected with a safety valve
	in accordance with the
	ASME Boiler and Pressure Vessel Code
	or ASME CSD
	-
	1.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1006.2 Safety relief valves for hot water boilers.
	Hot water
	boilers shall be protected with a safety relief valve
	in
	accordance with the
	ASME Boiler and Pressure Vessel Code
	or ASME CSD
	-
	1
	.
	1006.3 Pressure relief for pressure vessels.
	Pressure vessels
	shall be protected with a pressure relief valve or
	pres-
	sure
	-
	limit
	ing device as required by the manufacturer’s instructions for the pressure vessel and
	in accordance with the
	ASME Boiler and Pressure Vessel Code
	or ASME CSD
	-
	1.
	1006.4 Standards of safety and safety relief valves.
	Safety and safety relief valves shall be l
	isted and labeled, and
	shall have a minimum rated capacity for the equipment or appliances served. Safety and safety relief valves shall be
	set at not greater than the nameplate pressure rating of the boiler or pressure vessel and shall be in accordance wi
	th
	the
	ASME Boiler and Pressure Vessel Code
	or the ASME CSD
	-
	1
	.
	1006.5 Installation.
	Safety or relief valves shall be installed directly into the safety or relief valve opening on the
	boiler or pressure vessel. Valves shall not be located on either side of a safety or relief valve connection. The relief
	valve drain shall
	discharge by gravi
	ty to a nonhazardous point of discharge without obstruction.‡
	1006.6 Safety and relief valve discharge.
	Safety and relief valve discharge pipes shall be of rigid pipe that is approved
	for the temperature of the system. The discharge pipe shall
	, at a minimu
	m,
	be the same diameter as the safety or relief
	valve outlet. Safety and relief valve discharge pipes shall be properly supported to prevent stress on the valve and
	vessel. Safety and relief valves shall not discharge so as to be a hazard, a potential caus
	e of damage or otherwise a
	nuisance.
	Discharge of hazardous materials must be properly contained in a method approved by the department.
	High
	-
	pressure
	-
	steam safety valves shall be vented to the outside of the structure. Where a low
	-
	pressure safety valve
	or
	a relief valve discharges to the drainage system, the installation shall conform to the
	New York City
	Plumbing Code
	.
	1006.7 Boiler safety devices.
	Boilers shall be equipped with controls and limit devices as required by the manufac-
	turer’s instructions and
	the conditions of the listing.
	1006.8 Electrical requirements.
	The power supply to the electrical control system shall be from a two
	-
	wire branch
	circuit
	that has a grounded conductor, or from an isolation
	trans
	-
	former
	with a two
	-
	wire secondary. Where an i
	solation
	transformer is provided, one conductor of the secondary
	winding
	shall be grounded. Control voltage shall not exceed
	150 volts nominal, line to line. Control and limit devices shall
	interrupt
	the ungrounded side of the circuit. A means
	of manually
	disconnecting the control circuit shall be provided and controls shall be arranged so that when deener-
	gized, the burner shall be inoperative. Such disconnecting means shall be capable of being locked in the off position
	and shall be provided with ready acc
	ess.
	1006.8.1 Remote control (shutdown).
	A remote control shall be provided to stop the flow of oil and/or gas and
	combustion air to any burner or fuel
	-
	burning internal combustion equipment. Such a control shall be provided
	along every means of egress from
	the room in which the burner or equipment is located. Each remote control shall
	be located outside of, but as close as practicable to the burner or equipment room itself and shall be labeled:
	“REMOTE CONTROL FOR BURNER.”
	Exception:
	Where an outside locati
	on is impracticable, the remote control shutdown may be provided immedi-
	ately inside the room in which the burner or equipment is located.
	Such location must be accessible at all times.
	1006.9 Carbon monoxide detectors.
	Carbon monoxide detectors shall be p
	rovided in all fuel
	-
	fired appliance rooms
	to detect the level of carbon monoxide in the room and signal an alarm. Such detectors shall be listed and installed
	in accordance with Chapter 9 of the
	New York City Building Code
	.
	SECTION
	MC
	1007
	BOILER
	LOW
	-
	WATER CUTOFF
	1007.1 General.
	Steam and hot water boilers shall be protected with
	dual
	low
	-
	water cutoff control, with each control
	independently piped to the pressure vessel in accordance with ASME CSD
	-
	1. For hydronic boilers, the low
	-
	water cut
	out may
	be located in the supply piping above the boiler before any intervening valve. A flow
	-
	sensing control installed
	in accordance with ASME CSD
	-
	1 shall be considered a low
	-
	water cutoff for the purposes of this section.
	Exception:
	Hot water
	boilers
	located wit
	hin a dwelling unit supplying only
	that
	unit and having a total heat input
	of
	less than 400,000 Btu/h (117.2 kW) may be
	protected
	by only one low
	-
	water cutoff
	control.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1007.2 Operation.
	Low
	-
	water cutoff controls and flow
	-
	sensing controls required by Section 1007.1 shall automati-
	cally stop the combustion operation of the appliance when the water level drops below the lowest safe water level as
	established by the manufacturer
	and in accordance with ASME CSD
	-
	1,
	or when water circulation stops, respectively.
	10
	07.3 Low
	-
	water cut out maintenance and testing.
	Low
	-
	water cut outs shall be maintained in accordance with
	ASME CSD
	-
	1 and the manufacturer’s specifications. An operator shall test low
	-
	water cut outs as follows: (1) high
	pressure steam boilers every shift, (
	2) low pressure steam boilers daily and (3) hot water boilers monthly. Slow drain
	tests shall be conducted for steam boilers every six months.
	Every year, low
	-
	water cut outs and associated piping for
	steam boilers shall be opened, cleaned and inspected.
	Re
	cords of all testing, cleaning, and inspection required by this
	section shall be maintained, and made available to the department upon request.
	SECTION MC 1008
	BOILER BLOWOFF/BLOWDOWN VALVES
	1008.1 General.
	Every boiler
	shall be equipped with blowoff
	/blow
	down
	valve(s). The valve(s) shall be installed in
	the
	openings
	provided on the boiler. The minimum
	quantity and
	size of the valve(s) and associated piping shall be the
	quantity and
	size specified by the boiler manufacturer or the
	quantity and size of the boiler blowoff
	/blowdown
	valve
	opening. Where the maximum allowable working pressure of the boiler exceeds 15 psig (103.4 kPa), two bottom
	blowoff valves shall be provided consisting
	of either two slow
	-
	opening valves in series or one quick
	-
	opening valve
	and one slow
	-
	opening valve in series, with the quick
	-
	opening valve installed closest to the boiler.
	1008.2 Discharge.
	Blowoff
	/blowdown
	valves shall discharge to a safe place of disposal. Where discharging to the
	drainage system, the installation shall conform to the
	New York City
	Plumbing Code.
	1008.3 Maintenance.
	Blowdown lines shall be inspected annually to verify they are free of deposits and in good
	working condition.
	SECTION MC 1009
	HOT WATER BOILER EXPANSION TANK
	1009.1 Where required.
	An expansion tank shall be installed in every hot water system. For multiple boiler installa-
	tions, not less than one expansion tank is required. Expansion tanks shall be of the closed or open type. Tanks shall
	be rated for the pressure of the hot water system.
	Lockable shutoff valves shall be installed at connections to all
	expansion tanks. Valves shall remain locked in the open position.
	1009.2 Closed
	-
	type expansion tanks.
	Closed
	-
	type expansion tanks shall be installed in accordance with the manu-
	facturer’s instructions. Expansion tanks for systems designed to have an operating pressure in excess of 30 psi (205.8
	kPa) shall be constructed and certified in accordance with the
	ASME Boiler and Pressure Vessel Code
	. The size of the
	tank shall be based on the capacity of the hot
	-
	water
	-
	heating system. The minimum size of the tank shall be determined
	in accordance with the following equation where all necessary
	information is known:
	V
	t
	=
	(
	0
	.
	00041T
	−0
	.
	0466
	)
	V
	s
	�
	P
	a
	P
	f
	�
	−�
	P
	a
	P
	o
	�
	(Equation 10
	-
	1)
	For SI:
	V
	t
	=
	(
	0.
	000738T
	−
	0.
	03348
	)
	V
	s
	�
	P
	a
	P
	f
	�−�
	P
	a
	P
	o
	�
	where:
	V
	t
	=
	Minimum volume of tanks (gallons) (L).
	V
	s
	=
	Volume of system, not including expansion tanks
	(gallons) (L).
	T
	=
	Average operating temperature (
	°
	F) (
	°
	C).
	P
	a
	=
	Atmospheric pressure (psi) (kPa).
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	P
	f
	=
	Fill pressure (psi) (kPa).
	P
	o
	=
	Maximum operating pressure (psi) (kPa).
	Where all necessary information is not known, the minimum size of the tank shall be
	determined from Table 1009.2.
	TABLE 1009.2
	CLOSED
	-
	TYPE EXPANSION TANK SIZING
	SYSTEM VOLUME
	IN GALLONS
	TANK CAPACITIES IN GALLONS
	Pressurized
	Diaphragm Type
	Nonpressurized
	Type
	100
	9
	15
	200
	17
	30
	300
	25
	45
	400
	33
	60
	500
	42
	75
	1,000
	83
	150
	2,000
	165
	300
	For SI: 1 gallon = 3.795 L.
	1009.3 Open
	-
	type expansion tanks.
	Open
	-
	type expansion tanks shall be located not less than 4 feet (1219.2 mm)
	above the highest heating element. The tank shall be adequately sized for the hot water system. An overflow with a
	minimum
	diameter
	of 1 inch (25.4 mm) shall be installed at the to
	p of the tank. The overflow shall discharge to the
	drainage system in
	accordance
	with the
	New York City
	Plumbing Code.
	SECTION MC 1010
	GAUGES
	1010.1 Hot water boiler gauges.
	Every hot water boiler shall have a pressure gauge and a temperature gauge, or a
	c
	ombination pressure and temperature gauge. The gauges shall indicate the temperature and pressure within the normal
	range of the system’s operation.
	1010.2 Steam boiler gauges.
	Every steam boiler shall have a water
	-
	gauge glass and a pressure gauge with a s
	iphon.
	The pressure gauge shall indicate the pressure within the normal range of the system’s operation.
	1010.2.1 Water
	-
	gauge glass.
	The gauge glass shall be installed in accordance with the
	ASME Boiler and Pressure
	Vessel Code
	or ASME CSD
	-
	1.
	SECTION MC 1011
	TESTS
	1011.1 Tests.
	Upon completion of the assembly and
	installation
	of boilers and pressure vessels, acceptance tests shall
	be conducted in accordance with the requirements of the
	ASME Boiler and Pressure Vessel Code
	. Boilers shall not
	be placed in operation upon completion of construction until they have been inspected
	a
	nd
	tested and a certificate of
	compliance has been issued by the commissioner. All final inspections and
	tests
	for boilers shall be witnessed by a
	qualified boiler inspector in the employ of the department or a duly authorized insurance company as provided
	in
	Section 204 of the Labor Law of the State of New York. Equipment having an input of not more than 350,000 Btu/h
	(103 kW) shall be exempt from this requirement. Where field assembly of pressure vessels or boilers is required, a
	copy of
	the completed H
	-
	2
	, P
	-
	2 or U
	-
	1 Manufacturer’s Data Report and the completed Appendix C of ASME CSD
	-
	1
	required by the
	ASME Boiler and Pressure Vessel Code
	shall be submitted to the
	department
	.
	1011.1.1 Fitness for service.
	When a boiler or pressure vessel has exceeded its us
	eful life or has been subjected to
	an event that may have impacted the integrity of the pressure vessel, the department may require that a fitness for
	service study be completed. The study shall be completed in accordance with the
	National Board Inspection
	Code
	Part 2, Section 4, and documented in accordance with the National Board 403 form.
	BOILERS, WATER HEATERS AND PRESSURE VESSELS
	1011.2 Test gauges.
	An indicating test gauge shall be
	connected
	directly to the boiler or pressure vessel where it is
	visible to the operator throughout the duration of
	the test. The pressure gauge scale shall be graduated over a range of
	not less than one and one
	-
	half times and not greater than four times the maximum test pressure. Gauges utilized for
	testing shall be calibrated and certified
	annually in accordance with
	ASME B40.100
	by the test operator.
	‡‡‡
	1011.3 Periodic boiler inspections.
	Periodic boiler inspections shall be performed in accordance with Article
	303
	of Chapter 3
	of Title 28
	of the
	Administrative Code
	and Section 1007.3 of this code. In
	addition, boiler inspec-
	tions shall:
	1.
	Be completed in accordance with the
	National Board Inspection Code
	.
	2.
	Include the review of testing documentation for all controls and safety devices.
	3.
	Verify that the flue connection from the boiler to the chimney
	is properly sealed and in good working condition.
	4.
	Verify that the combustion air system as originally designed is operational.
	5.
	Verify that the High Pressure Operators’ licenses are current and that Low Pressure Operators are qualified per
	New York S
	tate requirements.
	6.
	Include a permanent record of the visit.
	7.
	Be subject to the quality control measures of the department.
	1011.4
	Pressurized systems containing hazardous materials.
	Any pressurized system that contains hazardous ma-
	terials or presents
	a physical hazard by release shall be pre
	-
	approved for installation, subject to testing, and subject to
	inspection by the department.
	1011.5 Nondestructive examination.
	When required by the department, the nondestructive examination (NDE) re-
	quirements, in
	cluding technique, extent of coverage, procedures, personnel qualification, and acceptance criteria, shall
	be performed in accordance with the applicable provisions of the edition of the code of construction for the pressure
	-
	vessel in effect at the time of
	installation. Weld repairs and alterations shall be subject to the same nondestructive
	examination requirements. Where this is not possible or practicable, alternative NDE methods acceptable to the in-
	spector and the department may be used.
	SECTION MC 1012
	MAXIMUM TEMPERATURE
	1012.1 Maximum temperature.
	Maximum indoor temperature in spaces surrounding boilers, water heaters, and
	pressure vessels shall not exceed the operational temperature of the installed equipment or 104°F (40°C).