H08.REV

BOILER PLANT - GAS FIRED

NOTE: PREFINAL DRAFT COPY DATE: MAY, 1988.

NOTE: THIS SECTION COVERS SMALL GAS-FIRED CAST IRON LOW PRESSURE STEAM AND HOT WATER BOILERS - RESIDENTIAL CLASS - WITH INTEGRAL COMBUSTION CHAMBERS, PRESSURE FIRED BURNER AND OPTIONAL DOMESTIC WATER HEATERS. DO NOT USE THIS SECTION FOR BOILERS OVER 2,000 SQ FT EDR STEAM RATING OR OVER 500,000 BTU/HR NET I-B-R HOT WATER RATING

NOTE: FOR VERY SMALL INSTALLATIONS, CONSIDER UNITS WITH ATMOSPHERIC BURNERS - NOT COVERED IN THIS SPECIFICAITON

Part 1 -	GENERAL

1)	WORK INCLUDED

A.	Work in this Section includes the providing of labor, materials, equipment, and services necessary for a complete and safe installation in accordance with the contract documents and all applicable codes and authorities having jurisdiction for the following

NOTE: INDICATE ALL WORK TO BE COVERED BY THIS SECTION. EDIT PORTIONS OF WORK INDICATED TO SUIT PROJECT REQUIREMENTS

1.	Boiler-burner unit - cast iron boiler, gas burner.

NOTE: EDIT IF PREFABRICATED BREECHING AND CHIMNEY'S ARE USED. SEE SECTION FOR PREFABRICATED BREECHING AND CHIMNEY'S

2.	Breeching.

3.	Piping

4.	Condensate return unit.

5.	Burner emergency disconnect switch.

6.	Electrical supply panel.

7.	Wiring as noted.

8.	All other necessary or mandated components and services

2)	RELATED WORK AND REQUIREMENTS

A.	Requirements of GENERAL CONDITIONS, DIVISION NO. 1 and Section GENERAL PROVISIONS FOR HEATING, VENTILATING AND AIR CONDITIONING WORK apply to all work in this Section

NOTE: EDIT TO SUIT PROJECT REQUIREMENTS. INCLUDE ONLY SECTIONS DIRECTLY AFFECTING WORK OF THIS SECTION

B.	Related Work in the following Sections:

1.	PIPING

2.	LOW PRESSURE STEAM SYSTEM

3.	HOT WATER SYSTEM

NOTE: USE ONLY IF BREECHING IS REMOVED OR MODIFIED IN THE SECTION.

4.	PREFABRICATED BREECHINGS AND CHIMNEYS

5.	INSULATION

6.	MOTORS

7.	MOTOR CONTROLLERS

8.	-----

3)	REFERENCE STANDARDS

A.	Published specifications, standards, tests or recommended methods of trade, industry or governmental organizations apply to work in this Section

B.	Comply with all applicable national, state and local codes and refer to Section GENERAL PROVISIONS FOR HEATING, VENTILATING AND AIR CONDITIONING WORK for additional Reference Standards

4)	QUALITY ASSURANCE

YS

A.	System shall be arranged for simultaneous operation of boilers

B.	System shall be arranged to prevent simultaneous operation of boilers

C.	System shall be arranged for lead/lag sequential operation of boilers

SYS

D.	Fuel burning system shall be guaranteed to operate satisfactorily and efficiently without objectionable smoke or odor

E.	Boiler-burner units shall be installed in accordance with requirements and recommendations of manufacturer and

1.	American Gas Association (AGA).

2.	American Society of Mechanical Engineers (ASME).

3.	American Society of Testing and Materials (ASTM).

4.	American Welding Society (AWS).

5.	Factory Mutual (FM).

6.	Intitute of Boiler and Radiator Manufactors (I-B-R)

7.	Industrial Risk Insurers (IRI).

8.	Local air pollution control criteria.

9.	Local building ordinances.

10.	National Electrical Manufacturers Association (NEMA).

11.	National Fire Protection Association (NFPA).

12.	Rules of utility company.

13.	Underwriters Laboratory (UL).

NOTE: FOR NEW YORK CITY.

F.	The installation shall be in compliance with Industrial Code Rule 4, State of New York Department of Labor

G.	Manufacturers shall have a Material Equipment Approval (MEA) Number or Bureau of Standards and Appeals (BS&A) Numbers for the City of New York

H.	The operation shall be fully automatic. Arrange air and gas control to meet requirements specified

5)	SERVICING

A.	Render free 24-hour service for a period of one year from date of acceptance of system. The service organization shall have a minimum of 5 years experience in servicing a boiler plant of similar size and type. All service personnel shall be factory trained

NOTE: EDIT TO SUIT PROJECT REQUIREMENTS. INCLUDE REFERENCES ONLY DIRECTLY AFFECTING WORK OF THIS SECTION

6)	SUBMITTALS

A.	Submit shop drawings and product data for the following:

1.	Boiler-burner units: construction details, dimensions, capacity, fuel train, equipment catalogs and certified factory fire-test

2.	ASME, UL and AGA Certification.

3.	Wiring diagrams, prepared specifically for this project, including interlocking, controls and alarms

4.	Piping layout drawings.

5.	Gas specialties.

6.	Breeching.

7.	Electrical supply panel.

NOTE: FOR STEAM SYSTEMS.

VALVE

8.	Safety valve.

NOTE: FOR HOT WATER SYSTEMS.

9.	Relief valve.

NOTE: FOR STEAM SYSTEMS.

VALVE

10.	Condensate return pumps.

Part 2 -	PRODUCTS

1)	BASE BID MANUFACTURERS

A.	Boiler: The H.B. Smith Co. Inc., Weil-McLain, (A. Marley Co.), Hydronics Div., Burnham Corp. and the Peerless Heater Co., Div. of Peerless Industries

B.	Gas burner (natural gas): Gordon-Piatt Inc., Webster, and Power-Flame

C.	Instantaneous hot water heaters: Taco Inc., The H.B. Smith Co. Inc., Weil-Mclain, Bell & Gossett, (ITT Fluid Handling Div.) and Lindy Coil Inc

D.	Gas valves: Honeywell Inc., General Controls and Automatic Switch Co. (ASCO)

E.	Boiler liquid level and pressure controls: McDonnell & Miller, (ITT Fluid Handling Div.)

F.	Condensate pumps: Hoffman Specialty, (ITT Fluid Handling Div.), Skidmore Corp., Federal Pump Corp. and Domestic Pump, (ITT Handling Div.)

G.	Electrical supply panels: Cutler-Hammer, Inc., Square D. Co. and General Electric Co

2)	PIPE

A.	Gas piping shall be as specified in Section "PIPING" using malleable iron fittings. Provide full ported square head plug cock valves

B.	Fill and make-up water: Refer to Section "PIPING".

3)	BREECHING

A.	Breeching shall be No. 16 USSG black steel, welded airtight to connect boiler smoke outlet with chimney. Fit int thimble in chimney and pack with non-asbestos fireproof caulking. Suppl thimble for installation under General Construction Work

B.	Provide with barometric draft control.

C.	Support for breeching from overhead construction shall be submitted for approval

4)	BOILER-BURNER UNIT

A.	Boiler-Burner shall be factory-assembled, complete with piping, wiring. Unit shall be tested constructed in accordance with the ASME Code with capacities as noted. Unit shall be capable of developing full I-B-R gross output capacity at 100 percent firing rate. All controls and circuit shall be grounded and designed to operate on 120 volt, 60 hertz. Provid transformers

B.	Boiler:

1.	Boiler shall be sectional, cast iron tubular type.

2.	Boiler shall have a pressurized fire box for force draft venting and a refactory insulated burner mounting plate with the necessary holes and tapping to mount the burner. A sealing gasket shall be used to assure permanent gas-tight seal between boiler sections.

3.	Boiler shall be complete with bronze drain valves; tappings for controls integral precast, tirebrick combustion chamber; steel flue scraper and brush

NOTE: FOR STEAM BOILERS.

OILER

a.	Trim shall include safety valve, water column, gauge glass and trycocks and 4-1/2 inch diameter steam pressure gauge with brass tee-handle cock and brass pipe syphon

NOTE: FOR HOT WATER BOILERS.

b.	Trim shall include relief valve and 4 1/2 inch diameter thermometer with separable well

OILER

4.	Boiler shall be insulated with 1-inch thick fiberglass insulation.

5.	Boiler shall have a steel jacket minimum No. 20 USSG, with baked enamel finish

NOTE: COORDINATE WITH PLUMBING DEPARTMENT.

6.	Domestic hot water heater: Provide instantaneous type, built-in or external, with heater similar to Smith-Mills Type SMR or Taco Tankless Heater

7.	Provide boiler similar to Weil-McLain Series 76.

C.	Burner:

1.	Burner shall be a flame retention type design for either balanced or forced draft venting condition with natural gas at 1000 Btu per cu ft. Burner shall be UL certified

NOTE: EDIT BURNER OPERATION TO SUIT REQUIREMENTS

2.	Burner shall be arranged for on-off operation with pre-purge, low-fire start and one position air control

3.	Gas control manifold shall consist of pilot gas filter, adjustable gas pressure regulating valve, throtting type automatic gas valves, automatic pilot switch, manual shutoff valve and main manual gas shutoff valve

D.	Operating and safety controls: Flame safeguard control system with flame detector, similar to Honeywell R7795C with prepurge cycle or Fireye UVM-2. System shall consist of program and control purge, ignition and firing cycles and to shut down burning system in the event of ignition or main flame failure. Manual reset after flame or ignition failure

NOTE: FOR STEAM SYSTEMS.

OILER

1.	Boiler shall be equipped with a high steam pressure limit switch to stop burner and sound alarm in event of excess steam pressure, similar to Mercoid DR-31 with manual reset

NOTE: FOR HOT WATER SYSTEMS.

2.	Boiler shall be equipped with a high water temperature limit switch to stop burner and sound alarm in event of excessive hot water temperature, similar to Mercoid DR-35 with manual reset

OILER

3.	Boiler shall be equipped with a low water cutoff to stop burner and sound alarm in event boiler water falls below boiler manufacturer's recommended minimum safe level, similar to McDonnell No. 150 with manual reset

NOTE: FOR STEAM SYSTEMS.

ONTROL

4.	Boiler shall be equipped with a operating pressure control to start and stop burner and to maintain adjustable predetermined steam pressure, similar to Mercoid Series DA-31

NOTE: FOR HOT WATER SYSTEMS.

5.	Boiler shall be equipped with a operating temperature control to stop and start burner and to maintain adjustable predetermined water temperature, similar to Mercoid Series DA-35

ONTROL

6.	Control transformer shall be for 120/240 volt operation.

7.	All controls shall be enclosed in dust-tight enclosure mounted on burner unit, factory prewired and brought out to numbered terminal strips

E.	Make-up water controls:

NOTE: USE COMBINATION WATER FEEDER AND LOW-WATER CUTOFF FOR BOILERS WITH DIRECT GRAVITY RETURN TO BOILERS. USE CONDENSATE PUMP CONTROL FOR STEAM SYSTEM WITH CONDENSATE PUMPS

1.	Boiler shall be equipped with a combination boiler water feeder, low water cutoff alarm to maintain boiler water level by automatically feeding water into boiler, to stop burner and sound alarm if water level drops below minimum, similar to McDonnel No. 47-2M. Blowoff water shall be piped to drain

NOTE: FOR STEAM SYSTEMS.

VALVE

F.	Safety valves similar to Dresser Consolidated, No. 1543, side outlet, nonadjustable bronze body safety type, ASME rated and approved and factory set and sealed at 15 psig

1.	Size and number shall be in accordance with the ASME Code for low pressure heating boilers

2.	Valves shall have no simmer at pressure below set pressure

3.	Pull ring test assembly with galvanized wire cable, pulleys and pull handle

NOTE: FOR HOT WATER SYSTEMS.

G.	Relief valves, similar to McDonnell No. 240, side outlet, cast iron, nonadjustable, pop safety type, ASME rated and approved and factory set and sealed at 30 psig set pressure. Spring shall be carbon steel and disc and seat shall be brass and high temperature silicone. Provide valves with pull ring test assembly with galvanized wire cable, pulleys and pull handle. Valves shall be sized in accordance with the ASME Code for low pressure heating boilers

VALVE

NOTE: DO NOT USE FOR HOT WATER BOILERS OR STEAM BOILERS WITH DIRECT GRAVITY RETURN

5)	CONDENSATE RETURN UNIT

UMP

A.	Pump shall be duplex vertical type, close coupled to motors with bronze casing and rotor, stainless steel shaft, heavy cast iron receiver for floor mounting, low inlet connection, inlet strainer, check valves, motors and motor controllers

NOTE: COORDINATE MOTOR CONTROLLER WITH ELECTRICAL DEPARTMENT.

1.	Pump shall be actuated by a mechanical alternator and be similar to Domestic Series CC

B.	Pump shall be duplex vertical type, close coupled to motors, with bronze casing and rotor, stainless steel shaft, heavy welded steel receiver for floor mounting, low inlet connection, inlet strainer, check valves, motors and motor controllers

UMP

NOTE: COORDINATE MOTOR CONTROLLER WITH ELECTRICAL DEPARTMENT.

1.	Pump shall be actuated by a mechanical alternator and be similar to Domestic series CS.

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

6)	EMERGENCY DISCONNECT SWITCH

A.	Burner emergency disconnect switch shall be surface mounted, toggle type, to shut off gas burning system, similar to asco. Switch shall be painted red and labeled burner emergency cutoff switch and mounted where indicated

7)	ACCESSORIES

A.	All alarms shall be connected to the burner control panel alarm. Alarm shall be a 4-inch bell similar to Faraday

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

8)	ELECTRICAL SUPPLY PANEL

A.	Controls for gas burning and pumping equipment, shall have circuit breakers for each circuit, surface mounted, similar to Cutler-Hammer. Circuits shall be for

1.	Gas burner.

2.	Automatic temperature controls.

NOTE: FOR STEAM SYSTEMS:

PUMP

3.	Condensate return pump.

NOTE: HOT WATER SYSTEMS.

4.	Hot water circulators (specified in section -----------).

PUMP

5.	1 single pole and 1-2 pole, 15 amp spares.

Part 3 -	EXECUTION

1)	INSTALLATION

A.	Connect gas piping to burner from gas connection provided under Plumbing Work

B.	Connect make-up water feeder inlet piping to City water connection provided under Plumbing Work

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

C.	Electrical supply panel feed and disconnect switch will be under Electrical Work. Provide wiring from disconnect switch, including wiring to panel equipment emergency cutoff switch and alarms. Feeder from disconnect switch to panel shall be the same size as feeder to disconnect switch. Install wiring in rigid conduit and in accordance with specification for Electrical Work

2)	ADJUSTMENT AND CLEANING

A.	Upon completion, clean boilers and related piping using cleaner as recommended by boiler manufacturer. Boil out for at least four hours, drain and refill twice

B.	Supply services of authorized factory representative of boiler-burner manufacturer for start-up and adjustment of burners and controls including

1.	Adjust burners for optimum fuel-air ratio over full operating range of burner

2.	Test individual burner controls for proper operation.

3.	Test low water cutoff for proper operation.

NOTE: FOR STEAM SYSTEMS.

TEST

4.	Test boiler safety valves per manufacturer recomendation.

NOTE: FOR HOT WATER SYSTEMS.

5.	Test boiler relief valves per manufacturer recomendation.

TEST

6.	Set burner firing rates for specified conditions.

7.	Operating instructions: Provide instruction period of one 7 hour day Owner's for designates personnel

C.	Submit written report by boiler-burner manufacturer representative to the Owner certifying that all safety and operating controls and burners have been properly installed, calibrated and adjusted