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READ AND REMOVE THIS PAGE BEFORE PLACING
THE SPECIFICATION SECTION IN THE CONTRACT

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DIVISION 15:  MECHANICAL

SECTION 15555 ‑ BOILERS

USE:	Furnishing and installing boilers complete with accessories.

NOTES TO SPECIFIER:

	A.	Options within paragraphs are identified by enclosure in brackets; blank spaces enclosed by brackets [_____] provide for information to be inserted, as appropriate, to individual projects.

	B.	TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES, the specifier must edit (delete, substitute or add to the text).  The remaining paragraphs must be renumbered.

	C.	DELETE FOR FINAL COPY: Notes to the Specifier, located between lines of asterisks; all [brackets], underlining, boldface, and italics, within the paragraphs; and this page.  (Open Reveal Codes [alt F3] to do this accurately.)

	D.	To Edit “(Footer B)”: (Corel 8).  ENTIRE FOOTER SHOULD BE BOLDED.  Click in the footer and delete the “Project Name (ftr B)” text and replace it with the Name of the Project (upper and lower case).  Replace date with current MM/YY (WITHOUT BRACKETS).

	E.	The Guide Specifications are intended to be continuously reviewed and revised.  User’s technical comments are appreciated.  Also, other related or similar specification that are written “from scratch” that could benefit others, or other questions can be sent to NSTC A/E Group, ST 110, or call (303) 987-6868.

DRAWING DATA REQUIRED: 

REQUIRED SPEC MODIFICATIONS:

GENERAL NOTES

A.	Whenever entire articles, paragraphs or subparagraphs are not applicable, the articles, paragraphs or subparagraphs should be deleted; when necessary, reletter or renumber articles, paragraphs or subparagraphs.

B.	THIS GUIDE IS NOT INTENDED AS A SUBSTITUTE FOR READING THE ENTIRE SECTION.

TECHNICAL NOTES

A.	1.1A:  Select applicable words.

B.	1.1B:  Select or add applicable specification sections.  Do not list specification sections from Division 15.

C.	1.2:  Select or add applicable references.

D.	1.3B:  Insert number of copies of the manufacturer's descriptive data required.  Normally 5 copies are required.  Distribution after review is normally 1 copy to the COR, 3 copies to the Contractor, and 1 copy to the project file.

E.	1.3C:  Insert number of copies of the manufacturer's installation instructions required.  Normally 5 copies are required.  Distribution after review is normally 1 copy to the COR, 3 copies to the Contractor, and 1 copy to the project file.

F.	1.3D:  Insert number of copies of the manufacturer's operating and maintenance instructions required.  Normally 5 copies are required.  Distribution after review is normally 1 copy to the COR, 3 copies to the Contractor, and 1 copy to the project file.

G.	1.3E:  Insert number of copies of shop drawings required.  Normally 5 copies are required.  Distribution after review is normally 1 copy to the COR, 3 copies to the Contractor, and 1 copy to the project file.

H.	2.1A:  Select applicable boiler type. 

I.	2.1C:  Insert BTUH values, working pressure and elevation.

J.	2.1D2:  Select applicable type of flue access.

K.	2.1E1:  Select applicable burner type.

L.	2.1E2:  Select applicable pressure type.

M.	2.1E3:  Select applicable burner type.

N.	2.1F:  Select applicable wording.

O.	2.2B7:  Insert BTUH values and elevation.

P.	2.2C1:  Insert allowable working pressure.

Q.	2.2D1:  Select fuel type and burner operation.

R.	2.2D4:  Insert electrical values.

S.	2.2D5:  Select applicable oil pump requirements.

T.	2.2D7:  Select applicable words.

U.	2.2E1:  Select control equipment.

V.	2.3A3:  Insert square footage of heating surfaces.

W.	2.3B1:  Insert BTUH values and elevation. 

X.	2.3C1:  Insert allowable working pressure.

Y.	2.3D1:  Select fuel type and burner operation.

Z.	2.3D5:  Select applicable pump requirements.

 	AA.	2.3D1:  Select control panel data.

	AB.	2.3E1:  Select type of system.

	AC.	2.4D:  Select temperature controller data.
    
 	AD.	2.5A:  Select type of breeching system.

	AE.	2.5C:  Select type of venting system.
	AF.	3.1B:  Select boiler base type.

	AG.	4.1 and 4.2:  When a "lump sum" Contract is used, delete the title PART 4:  MEASUREMENT AND PAYMENT, and both articles from this section.  Measurement and payment will be addressed in Part 4 of Section 01010 -Summary of Work.

REVISIONS OF THIS SECTION:
CSI format, editorial changes: 12/01
Metric:  
Technical Update: 01/91

SECTION 15555

BOILERS

PART 1:  GENERAL

1.1  SUMMARY:

	A.	Section Includes:  [Furnishing] [and] [Installing] boilers, including accessory equipment, piping, insulation, controls, and related appurtenances for heating purposes. 

1.2  REFERENCES:

	A.  American Society of Mechanical Engineers:
	ASME CSD-1-88		Controls for Safety Devices for Automatically Fired  Boilers 
	ASME BPVC-89		Boiler and Pressure Vessel Codes

	B.	National Fire Protection Association:
	NFPA 54-88		National Fuel Gas Code
	NFPA 70-90      	National Electrical Code
    	NFPA 211-88     	Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances

1.3  SUBMITTALS:

	A.	General:  Submittals shall be according to Section 01300 - Submittals.

	B.	Manufacturer's Literature:  Submit [____] copies of the manufacturer's descriptive data for the boiler to be used on this project.

	C.	Installation Instructions:  Submit [____] copies of the manufacturer's installation instructions for the boiler to be used on this project.

	D.	Operating and Maintenance Instructions:  Submit [____] copies of the manufacturer's operating and maintenance instructions for the boiler to be used on this project.

	E.	Shop Drawings:  Submit [____] copies of shop drawings for the boiler including [vent chimney] [stack location,] piping, and control diagram to be used on this project.  A parts list shall be furnished with the shop drawings.

PART 2:  PRODUCTS

2.1  CAST IRON BOILER:

	A.	General:  Provide a hot water boiler suitable for [forced] [induced] [natural] draft with insulated jacket, sectional cast iron heat exchanger, [gas] [oil] burning system, refractory, controls, and boiler trim.

	B.	Forced Draft Firing:  Provide water well design consisting of water backed combustion area with water circulating around fire box.  Refractory chamber or separate base is not required.

	C.	Performance:  Boiler shall be capable of providing a gross input of [____] Btuh, a gross output of [____] Btuh at [50] psi working pressure and [____] ft elevation.

	D.	Construction:  
	1.	Assemble from cast iron sections.  Seal section using an approved elastic sealant compound.
	2.	Make flue passages accessible without the use of special tools.  Provide clean-out and access doors, [observation ports], and relief openings.
	3.	Provide structural steel base with front plate, removable panels, and lifting lugs.
	4.	Insulate entire boiler with glass fiber, provide steel jacket, and finish with factory applied baked enamel.

	E.	Fuel Burning System:
	1.	Burner operations shall be [on-off] [hi-low-off] [modulating] [with low fire position for ignition.]
	2.	Oil burner shall be [high] [low] pressure atomizing type with electronic ignition.
	3.	Gas burner shall be [atmospheric] [power] type with electric ignition and gas pressure regulator.
	4.	Provide natural draft operation equipment, collector and draft hood as regularly supplied by boiler manufacturer.

	F.	Controls:  Controls shall be pre-wired, factory assembled electronic controls in a control cabinet with flame [scanner] [detector], programming control, relays and switches.  [Provide pre-purge and post-purge ignition and shut-down of burner in event of ignition pilot and main flame failure with manual reset].

2.2  STEEL WATERTUBE BOILER:

	A.	General:
	1.	Provide a factory assembled factory fire-tested, self contained, readily transported unit, ready for automatic operation except for connection of water, fuel, electrical and vent services.
	2.	Unit shall be steel membrane wall watertube boiler on integral structural steel frame base with integral forced draft burner, burner controls, boiler trim, refractory, insulation and jacket.

	B.	Performance:
	1.	Provide boiler for producing hot water with a gross input of [____] Btuh, and gross output of [____] Btuh at [____] psi working pressure and at [____] ft. elevation.

	C.	Boiler Shell:
	1.	Boiler shall be certified by ANSI Z 21.13] and constructed in conformance with ASME BPVC Section IV for an allowable working pressure of [_____] psi water.
	2.	Provide two lifting eyes on top of boiler.
	3.	Provide adequate tappings, observation pots, removable panels and access doors for entry, cleaning and inspection.
	4.	Insulate casing with readily removable glass fiber blanket insulation covered by sectional preformed sheet metal jacket.
	5.	Factory paint boiler, base and other components with baked enamel finish.

	D.	Fuel Burning System:
	1.	Forced draft automatic burner integral with front head of boiler designed to burn [No. 2 oil] [natural gas].  Burner operation shall be [on-off] [hi-low-off] [modulating] with low fire ignition position.  Maintain fuel air ratios automatically with flue gas temperature minimum of 68 degrees F. above dew point temperature of flue gas at boiler outlet.
	2.	Oil burner shall be flange-mounted low pressure air atomizing forced draft type with electric ignition.  Burner shall be UL 726 approved.
3.	Gas burner shall be forced draft, high radiant multi-port burner with gas-electric ignition and gas pressure regulator.
	4.	Blower shall be statically and dynamically balanced to supply combustion air.  Equip with inlet silencer and outlet air dampers.  Direct connect to motor.  Motor shall be [____] Hp, [____] volts, [____] phase, and [____] rpm.
	5.	Oil pump shall be two stage with a capacity of approximately twice the maximum firing rate.  [For boilers 100 hp and under, the oil pump shall be an integral part of the burner].  [For boilers over 100 hp, a separate oil pump and motor assemble shall be furnished by the boiler manufacturer].
	6.	Oil burner piping shall include oil pressure regulator, oil metering controls, solenoid shutoff valves, oil strainer and instrumentation, all integrally mounted on unit and adequate to permit system adjustment for optimum performance.
	7.	Natural gas burner piping shall consist of a complete gas train including pressure reducing valves, safety gas valves, gas cock [and other valves as required].

	E.	Control Panel:
	1.	Control panel shall be factory wired and mounted on boiler.  Hinged metal cabinet shall contain [electronic programming relay] [motor starters] and [control switches].
	2.	Program relay shall control ignition, starting and stopping of burner and provide pre-combustion purge and post-combustion purge.
	3.	Burner to shut down in event of ignition, pilot, or main flame failure.  Interlock to shut down burner upon combustion air pressure drop.

2.3  STEEL FIRE TUBE BOILERS

	A.	General:
	1.	Provide factory assembled, factory fire-tested, self-contained, readily transported unit, ready for automatic operation except for connection of water, fuel, electrical and vent services.
	2.	Mount on integral structural steel frame base and have integral forced draft burner, burner controls, boiler trim, refractory, insulation and jacket.
	3.	Unit shall have not less than [____] total square feet of fireside heating surface including a minimum of [____] square feet of primary or direct heating surface.

	B.	Performance:
	1.	Provide fire tube boiler for producing hot water with a gross input of [____] Btuh, and a gross output of [____] Btuh at [____] ft elevation.

	C.	Boiler Shell:
	1.	Boiler shall be certified by [AGA Z21.13] [UL 726] and constructed in conformance with ASME BPVC Section IV for an allowable working pressure of [____] psi water.
	2.	Provide two lifting eyes on top of boiler.

3.	Boiler shall have hinged front and rear doors gas tight, insulated and secured with heavy duty cap screws and replaceable brass nuts.

4.	Front and rear tube sheets and flue shall be fully accessible for inspection and cleaning when doors are open.
5.	Provide observation ports at each end of boiler.

6.	Provide adequate handholes and armholes for boiler cleaning and inspection.

7.	Provide spring loaded relief door.

8.	Insulate casing with readily removable glass fiber blanket insulation covered by sectional preformed sheet metal jacket.

9.	Factory paint boiler, base, and other components with hard-finish [silicone] paint.

D.	Fuel Burning System:
	1.	Forced draft automatic burner integral with front head of boiler designed to burn [No. 2 oil] [No. 6 oil] [natural gas].  Burner operation shall be [on-off] [hi-low-off] [modulating] with low fire ignition position.  Maintain fuel-air ratios automatically with flue gas temperature minimum of 68 degrees F. above dew point temperature of flue gases at boiler outlet.
	2.	Oil burner shall be low pressure atomizing, forced draft type with air damper and electronic ignition.  Air atomizing system shall include belt-driven compressor, lubricating oil tank, oil level indicator, inlet oil filter and air pressure gage.
	3.	Gas burner shall be forced draft, high radiant annular entry, premix, power burner with gas-electric ignition, gas safety valve, and gas pressure regulator.
	4.	Blower shall be statically and dynamically balanced to supply combustion air.  Equip with inlet silencer and outlet dampers.  Direct connect to motor.
	5.	Oil pump shall be two stage with a capacity of approximately twice the maximum firing rate.  [For boiler 100 hp and under, the oil pump shall be an integral part of the burner.]  [For boilers over 100 Hp, a separate oil pump and motor assembly shall be furnished by the boiler manufacturer.
	6.	Oil burner piping shall include an oil pressure regulator, oil metering control, solenoid shutoff valves, oil strainer and instrumentation, integrally mounted on the unit and adequate to permit system adjustment for optimum performance.
	7.	Natural gas burner piping shall consist of a complete gas train including pressure reducing valves, safety gas valves, gas cocks [and other valves as required.]
	8.	Drip pan shall be provided on floor under each oil burner.  Size shall be 24 by 24 inches by 2 inches deep, 16 gage galvanized steel soldered pan.

	E.	Control Panel:
	1.	Control panel shall be factory wired and mounted on boiler.  Hinged metal cabinet with key lock shall contain [electronic programming relay] [motor starters] and [control switches].
	2.	Program relay shall control ignition, starting and stopping of burner and provide both pre-combustion purge and post combustion purge.  Burner shall shut down in event of ignition, pilot or main flame failure.  Interlock shall shut down burner upon combustion air pressure drop.

2.4  BOILER TRIM:

	A.	Water pressure and Temperature Gage:  Provide combination water pressure and temperature gage.

	B.	Relief Valve:  ASME CSD-1 rated pressure relief valve set at 30 psi.

	C.	Low Water Cut-Off:  Provide low water cut-off with manual reset to automatically prevent burner operation when boiler water falls below safe level.

	D.	Temperature Controller:  Provide operating temperature controller [with outdoor reset] to maintain boiler water temperature.  [Provide electronic controller].

	E.	Limit Temperature Controllers:  Provide a limit temperature controller to control burner to prevent boiler water temperature from exceeding safe system water temperature.

	F.	Air Vent:  Provide air vent tapping in boiler shell.

2.5  BOILER BREECHING:

	A.	General:  Each boiler shall be connected from the draft hood or boiler smoke connection to the stack by means of a breeching.

	B.	Round Breeching:  Construct round breeching of black iron or steel with welded seams and joints according to NFPA 211 for metal connectors.  [Round breeching also may consist of approved factory-built chimney sections.]  The size of the breeching shall not be less than the size of the smoke outlet or draft hood of the boiler.

	C.	Cleanouts and Venting:  Provide suitable cleanouts to permit cleaning the entire breeching without dismantling.  For gravity vented boilers provide a [draft regulator of the barometric type for oil-fired draft control] [draft hood for atmospheric gas fired draft control.]

	D.	Breeching Hangers:  Breeching hangers shall be designed to carry not less than five times the breeching weight.  Hangers for round breeching shall be of the band type with hanger rods.  Hangers shall be of steel.

PART 3:  EXECUTION

3.1  INSTALLATION:

	A.	Location and Arrangement:  Install boiler in the [mechanical] room as close as possible to the location as shown on the drawings.  Arrange work in a neat and orderly manner so that minimum storage of equipment and material is required at project site.  All parts shall be readily accessible for inspection, repair and renewal.  Protect equipment from weather. 

	B.	Equipment Installation:  Install equipment according to the installation instructions of the manufacturer.  [Install boiler on [5 1/2]-inch thick concrete base.]  [Grout equipment mounted on concrete foundation before piping is installed.]  Install piping in such a manner as not to place a strain on any of the equipment.  Installation shall conform to NFPA 31 and NFPA 54.

	C.	Circulation: The boiler burners shall be wired such that they cannot be fired unless the hot water circulating pump is circulating fluid through the boiler and shall shut-down if the flow through the boiler should stop.  

	D.	Combustion and Ventilation Air:  Facilities for combustion and ventilation air shall be provided and shall conform to the requirements of the NFPA 31 and NFPA 54. 

	E.	Discharges:  Controls and safety devices which may drip or discharge shall be individually piped to the nearest flow drain.  The piping shall not be sized less than the device discharge size.

3.2  DEMONSTRATION:

	A.	Requirements:  Upon completion of installation and after circuitry has been energized, the Contractor shall demonstrate capability and compliance of system with requirements.  Malfunctioning units shall be corrected and retested by the Contractor to demonstrate compliance with the specifications.

3.3  TRAINING OF GOVERNMENT EMPLOYEES:

	A.	Requirements:  See Section 01700 - Contract Closeout.

PART 4:  MEASUREMENT AND PAYMENT

4.1  METHOD OF MEASUREMENT:

	A.	Units:  The work described in this section will not be measured for payment.

4.2  BASIS OF PAYMENT:

	A.	Payment:  No direct payment for the work described under this section will be made.  The Contractor shall include consideration for this item in the bid price for other items of the Contract.

END OF SECTION