H10.REV

HOT WATER BOILER PLANT (Larger than 500,000 Btu/h)

NOTE: FINAL COPY: AUGUST, 1988

Part 1 -	GENERAL

1)	WORK INCLUDED

A.	Work included 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.	Mechanical draft boiler-burner units.

NOTE: SEE SECTION FOR PREFABRICATED BREECHING AND CHIMNEYS. EDIT THIS SECTION AS REQUIRED

2.	Breeching & Chimneys.

3.	Control system.

4.	Accessories.

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.	HOT WATER SYSTEM.

3.	INSULATION.

4.	MOTORS.

5.	AUTOMATIC CONTROL SYSTEMS.

6.	PREFABRICATED BREECHING AND CHIMNEYS.

7.	FUEL OIL TANKS AND SPECIALTIES.

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

SYS

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 Boiler Manufacturing Association (ABMA).

2.	American Gas Association (AGA).

3.	American Society of Mechanical Engineers (ASME).

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

5.	American Welding Society (AWS).

6.	Factory Mutual (FM).

NOTE: FOR CAST IRON BOILERS

7.	Institute of Boiler and Radiator Manufactors (I-B-R).

8.	Industrial Risk Insurers (IRI).

9.	Local air pollution control criteria.

10.	Local building ordinances.

11.	National Electrical Manufacturers' Association (NEMA)

12.	National Fire Protection Association (NFPA).

13.	Rules of utility company.

14.	Underwriters Laboratories (U.L).

NOTE: FOR NEW YORK CITY.

F.	Manufacture must have a Material Equipment Approval (MEA) number or Bureau of Standards and Appeals (BS&A) number for the City of New York

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

5)	SERVICE

A.	Provide free 24-hour service for one year from date of boiler plant acceptance, to include one complete heating season. Service personnel shall be factory trained. Service organization shall have a minimum of five years experience in servicing boiler plants of similar size and type, as approved

B.	Refer to Section GENERAL PROVISIONS FOR HEATING, VENTILATING AND AIR CONDITIONING WORK for Guarantee and other Quality Assurance requirements

6)	SUBMITTALS

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

1.	Boiler-burner units: certified drawings of unit equipment, ASME Certification, safety devices, controls, wiring diagrams, equipment catalogs and certified factory test results

2.	Breeching, chimney and support detail and calculations.

3.	Fuel oil system: fuel train, pumps, piping and wiring diagrams, equipment catalogs and certified factory test results of fuel oil train

4.	Control system: control panels, wiring diagrams and equipment catalogs

5.	Accessories:

a.	Smoke indicating and recording system and wiring diagrams

b.	Gas compressors.

Part 2 -	PRODUCTS

1)	BASE BID MANUFACTURERS

NOTE: EDIT AS REQUIRED.

A.	Steel packaged boilers: Cleaver-Brooks, Johnston and York - Shipley.

B.	Cast iron boilers: H.B. Smith Co. and Weil-McLain Co., Inc

NOTE: EDIT BURNERS FOR GAS, FUEL OIL OR COMBINATION FIRING. REVIEW WITH BOILER MANUFACTURER

C.	Burners: Superior Combustion Industries, Ray Burner Co., (Burner Division), Gordon - Piatt and Webster Combustion

NOTE: OIL PUMPS SUPPLIED AS PART OF PACKAGE BOILER.

D.	Oil Pumps Kraissl, Preferred Utilities and Viking Pump Co.

E.	Oil system accessories: Preferred Utilities and Renick Mahoney

2)	BOILER-BURNER UNITS

A.	Boiler-burner units shall be factory assembled, with boiler trim piped, wired and tested units, constructed and certified in accordance with the ASME Code, and of the design pressure and capacities scheduled on the drawings. Controls and circuits shall be grounded and shall operate on 120 volt, 60 hertz with required transformers. Units shall be tested and fired at factory. Before shipment, submit certified copies of test results. The boiler manufacturer shall be responsible for all unit components

B.	Unit equipment shall be furnished with, but not limited to, the following

NOTE: FOR PACKAGE STEEL BOILERS.

1.	Boiler shall be 3 or 4 pass, Scotch Marine hot water boiler with full wetback or dryback steel. Mount level on structural skids

a.	Furnace tubes without spinners or turbulators and refractory lined combustion chamber with removable refractory lined rear cleanout door, manhole and handholds and observation ports

b.	2 inch thick fibrous glass insulation and 2 coats of heat resisting enamel on steel casing

c.	A multiblade, No. 10 USSG steel damper with ball bearing shall be located in breeching connection. Damper shall be automatically operated by draft controls. See sequence draft control this section

d.	Lifting lugs and bronze hose cocks drain valves

e.	Explosion door with deflector in rear combustion chamber

f.	Maximum draft loss for 3 pass shall be 2.0 inch w.g. and for 4 pass shall be 6.0 inch w.g

g.	Overall efficiency shall be 80 percent minimum when operating between 80 percent and 100 percent of rating

h.	Thermometer shall be 8 inch diameter thermometer with brass tee-handle cock.

i.	Furnish steel flue brush and tube scraper with pipe handle.

j.	------ inch drain tappings with bronze rose cocks.

NOTE: FOR CAST IRON BOILERS

NOTE: CHECK DESCRIPTION OF SELECTED BOILER BEFORE EDITTING

2.	Boiler shall be tubular sectional cast iron with pressurized fire box for forced draft venting and a refractory insulated burner mounting plate with the necessary holes and tapping to mount the burner. Boiler shall be mounted on level structural skid. Boiler shall be capable of developing full I-B-R gross output capacity at 100 percent firing rate and have an overall efficiency of 80 percent when operating between 75 percent and 100 percent of rating.

a.	Steel flue scraper and brush, supply and return manifolds and bronze drain valves

b.	Multiblade, No. 10 USSG steel, damper with ball bearings shall be located in breeching connection. Damper will be automatically operated by draft controls. See sequence draft control in this section

c.	Thermometer be 8 inch diameter thermometer with brass tee-handle cock

d.	Boiler shall be provided with fiberglass insulated heavy gauge steel jacket with baked enamal finish, jacket shall be designed to permit installation after the connection of supply and return piping

NOTE: BURNER IS FOR A PACKAGE FIRE TUBE BOILER WITH AIR ATOMIZING FOR OIL FIRING

3.	Burner:

a.	GENERAL

BURNER

(1)	Burner shall be combination gas-oil burner, for independent burning of each fuel with oil burning arranged as standby

(2)	Burner shall be gas burner.

(3)	Burner shall be oil burning only.

BURNER

4.	Burner shall be capable of firing the boiler to the specified maximum continuous rating on all fuels specified without flame impingement or damage to any boiler part

5.	Burner shall be arranged for full modulation with pre-purge, proven low fire start, high fire run and post-purge

6.	Burner shall be furnished with a prewired unit control panel which incorporated an electronic combustion safeguard burner controls, ultraviolet sensitive electronic flame detector and burner management controls

NOTE: EDIT AS REQUIRED.

7.	Unit Control Panel shall be equiipped with a Manual fuel changeover without burner adjustment modifications

8.	Burner and all components shall be IRI (FM) approved.

a.	Gas Burner

(1)	Gas burner shall be a gas ring type with flame retention band. Burner shall be capable of a minimum 4 to 1 turndown while maintaining stable and efficient flame. Burner unit shall include

(a)	Gas flow control valve shall maintain constant pressure throughout the modulating range to maintain a constant fuel-air ratio

(b)	Gas pressure regulating valve shall reduce and maintain the pressure required for the main burner.

NOTE: EDIT AS REQUIRED.

(c)	Pilot manual shutoff plug type gas valve, pilot gas pressure regulator, dual pilot automatic solenoid shutoff valves, and low pilot gas pressure cutoff and alarm

(d)	Two main manual shutoff gas valves, lubricated plug types, main gas pressure regulator; motorized primary automatic safety gas shutoff valve and auxilliary motorized, automatic safety gas shutoff valve and variable input flow control valve

(e)	Solenoid valve between 2 automatic gas valves, vented to outside of building. It shall open to vent when automatic valves are closed. Provide separate vents for pilot automatic shutoff valves and main burner automatic safety valves

(f)	Solenoid valve with manual reset cutoffs and alarms for burner high and low gas pressure

(g)	Provide air distributing plenum and volume control damper, refractory and burner throat

(h)	Ignition system shall be automatic, gas-electric, magnetic shutoff valves. Provide gas pressure gauges

(i)	Input controller with positioning motor linked to multiport cylindrical air volume control and to gas volume control valve. Air flow switch to sense operation of draft fan

NOTE: EDIT IF STEAM IS TO USED FOR ATOMIZING

b.	Oil burner

IL

(1)	Oil burner shall be Suitable for No. 2 or No. 4 fuel oil

(2)	Oil burner shall be Suitable for No. 5 or No. 6 fuel oil

IL

(3)	Oil burner shall be low pressure air atomizing type with rotary atomizing air compressor with NEMA frame motor. Burner shall be capable of 4 to 1 turndown while maintaining stable and efficient flame. Boiler unit shall include

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

(a)	Dual fuel oil solenoid shutoff valves shall be piped in series and wired in

(b)	Oil suction piping manifold with cam operated fuel oil flow control valve, simplex fuel oil strainer, fuel oil pressure gauge, fuel oil thermometer, check valve and gate valve.

(c)	Provide drip pan under assembly of 16 gauge galvanized steel, welded, and sized to catch oil drippings

(d)	Input controller with positioning motor linked to multiport cylindrical air volume control and to oil burner cam control valve. Air flow switch to sense operation of draft fan

NOTE: FOR PACKAGE BOILER ONLY.

(e)	Air distribution plenum and volume control damper and refractory burner throat

IGNIT

(f)	Ignition shall be automatic, gas-electric magnetic shutoff valves, gas pressure gauges

(g)	No. 2 fuel oil ignition assembly shall consisting of an oil pump set skid mounted, a light oil firing head assembly and a 12,000 volt ignition transformer assembly. All parts shall be integrated into burner programming assembly to perform as a part of a standard intermittent ignition cycle

GNIT

NOTE: FOR NO. 5 or NO. 6 FUEL OIL.

UEL OIL

(h)	Fuel oil preheaters shall be boiler mounted low density electric and steam safety type, double shell, steam to water to oil heater, each wit thermostatic controls. Controls shall be set to prevent oil delivery t burner until oil in heater reaches manufacturer's recommended burning temperature and to cut out the electric heater when hot water is available

(i)	Fuel oil preheaters shall be boiler mounted low density electric and hot water safety type, double shell, water to water to oil forced circulation heater, each with thermostatic controls. An in-line hot water pump shall circulate boiler water through this primary preheater. Controls shall be set to prevent oil delivery to burner until oilinheater reaches manufacturer's recommended burning temperature and to cut out the electric heater when hot water is available

NOTE: FOR BOILERS; INDICATE VALUE OF EXTERNAL STATIC PRESSURE IN SCHEDULE, FOR CORRECT F.D. FAN & MOTOR SELECTION BY BOILER MANUFACTURER

9.	Forced draft fan shall be centrifugal type, with acoustically lined air inlet and scroll volume damper, rotary sleeve discharge damper, air pressure switch, motor, and motor controller

NOTE: COORDINATE FAN WITH ELECTRICAL DEPARTMENT.

NOTE: MAXIMUM dBA VALUE WILL VARY WITH BOILER SIZE.

a.	Sound pressure level at boiler rated capacity shall not exceed ----- dBA value per ABMA sound pressure test code for package boilers

NOTE: FOR CAST IRON BOILERS IF REQUIRED.

10.	Induced draft fan: shall have fan, similar to L.J. Wing Mfg. Co., at smoke outlet with side inlet and top discharge, heavy duty barometric damper on unit, totally enclosed, ball bearing, multispeed motor and belt drive. Also, provide motor controller, prepurge and low draft cutoff switch and vibration eliminator mountings

NOTE: COORDINATE FAN WITH ELECTRICAL DEPARTMENT.

C.	Relief valves: Shall have cast iron bodied, side outlet, nonadjustable, pop-safety type, ASME rated and approved, factory set and sealed, with carbon steel springs and brass and high temperature silicone seat and disc. Size shall be in accordance with ASME Code for low or high pressure boilers. Provide pull ring assembly for manually testing with galvanized wire cable, pulleys and lightweight pull handle, similar to McDonnell Miller No. 240 or Marine Industrial Products Series 1-5

NOTE: SAFETY CONTROLS ARE WRITTEN FOR COMBINATION GAS-OIL BURNER. EDIT TO SUIT SINGLE FUEL BURNERS. (GAS ONLY AND OIL ONLY)

D.	Safety controls:

1.	On oil firing, shut down boiler fuel oil pump, shut down burner, close automatic fuel oil valves. Sound alarm in the event of low fuel oil pressure, loss of combustion air, flame failure, loss of electric power to controls, low water level, loss of atomizing air and high water temperature

2.	On gas firing, shutdown burner, close automatic gas valves. Sound alarm in the event of high or low fuel gas supply pressure, loss of combustion air, flame failure, loss of electric power to controls, low water level and high water temperature

3.	Safety shutdown shall require manual reset.

4.	Aquastat, similar to Honeywell Model L 4006 B, shall prevent burner from moving from low fire position until water temperature reaches setting. A minimum boiler water temperature control shall prevent boiler water temperature reduction below 170 F

5.	Safety latch switch shall close automatic fuel valves whenever burner is swung open to prevent burner firing unless fully in position

3)	BREECHING AND CHIMNEY

NOTE: REVIEW LOCATION AND SUPPORT OF BREECHING AND CHIMNEY WITH STRUCTURAL ENGINEER. FOR PREFABRICATED SYSTEMS SEE SECTION ON PRE FABRICATED BREECHING AND CHIMNEY.

A.	Breeching and chimney shall be in accordance with NFPA No. 211 for metal connectors for low heat appliances, for use with building heating equipment burning gaseous and liquid fuels

B.	Cleanout doors to clean the entire breeching without dismantling shall be as indicated on drawings. Gauge steel shall not be less than that of the breeching. Size shall be 20 inch x 14 inch except breeching less than 16 inch one dimension 20 inch and the other dimension 2 inch less than breeching width. Provide larger sizes where required. Cleanout door assembly shall be gas tight with 1/16 inch thick non-asbestos gasket and planed faces 10 ft apart on centers

C.	Connections for gas sampling and smoke density indicators. Shall be provided with draft dampers shall have vent extensions and connections for temperature and draft sensors

D.	Drain caps at the bases of vertical sections shall be provided and shall be piped to suitable drains. Supports, hangers and anchors shall be designed to carry not less than five times the breeching weight. Stacks shall be terminated as indicated on drawings and in accordance with local codes and supported by a substantial steel framework

E.	Breeching of black iron or steel shall be welded air tight, not less than gauges listed = = DIAMETER GAUGES = 10 inches 24 = 10.1 - 14 inches 22 = 14.1 - 16 inches 20 = 16 inches 16 =

1.	Rectangular breeching shall have corners and girth angles: 1 1/2 inch x 1 1/2 inch x 1/2 inch. Provide 1 inch x 1 inch x 1/8 inch angles on 12 inch centers between girth angles to support covering

F.	Expansion joints shall be bellows type approximately 6 inches wide at locations shown on the drawings and as required. Joint system shall consist of 3/16 inch steel plate welded to the inside of breeching with downstream section of breeching free to move outside the plate. Steel reinforcing angles shall be welded around both top and bottom sections of breeching and between the angles. An expansion angle type bellows of 12 gauge steel shall be fitted and welded to the angles

G.	Chimney shall be welded steel construction shall be not less than gauges listed and have a galvanized steel rain shield and cap flashing = = DIAMETER GAUGES = 14 inches 16 = 14.1 - 16 inches 14 = 16.1 - 18 inches 12 = 18 inches 10 =

OTE: FOR COMBINATION BURNER IF AUTOMATIC CHANGE OVER FROM GAS TO OIL IS REQUIRED REVISE CONTROL SYSTEM

4)	CONTROL SYSTEM

A.	Control system shall be for fully automatic operation of boilers. The automatic controls and control cabinet (boiler control panel) shall provide low fire starting, for modulating flame control for boiler operation under varying loads and to control combustion and atomizing air and fuel ratio with modulating motors, controls, relays and wiring. Provide adjustable modulating temperature controller with manual adjustments to provide for lead-lag or parallel operation of boilers. Controls shall operate from hot water temperature to maintain constant predetermined temperature at main header, similar to Honeywell proportional band type. Provide remote indicator on boiler plant panel. Provide flow switch to sense water flow to prevent operation of lead/lag system in event of no-flow condition

NOTE: CHECK FIRE MICROPROCESSOR BASED FLAME-MONITOR (E100) BEFORE SPECIFYING THE FOLLOWING

B.	Burner flame failure controller to control ignition, starting and stopping of the burner, provide both a pre-combustion purge and post-combustion purge and to shut down the burner in the event of ignition, pilot or main flame failure. Provide contacts for external fresh air damper operators and remote emergency boiler shutdown switches

C.	An enclosed steel unit cabinet shall be mounted on boiler-burner unit with baked enamel finish, NEMA 1A enclosure with a Yale cabinet key lock. Provide gauges, signal lights, circuit breakers, selector switches, toggles, etc., flush mounted in face of cabinet(s) and identified by individual nameplates to indicate safety controls as specified under Safety Controls in this Section

1.	Motor controllers, circuit breakers, fuses, relays, flame safeguard programmers, transformers and contactors shall be mounted in cabinet. Provide with

a.	Circuit breakers for atomizing air compressor and draft fan

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

b.	Motor controllers: interlocked with burner and forced draft fan

c.	Burner ON-OFF switch wired in limit circuit.

d.	Central circuit fuses.

e.	White: CALL FOR HEAT signal light.

f.	Green: PILOT signal light.

g.	Blue: MAIN FUEL VALVE signal light.

h.	Amber: LOW DRAFT signal light.

i.	Red signal lights: FLAME FAILURE, HIGH WATER TEMPERATURE, LOW OIL PRESSURE, LOW WATER, HIGH GAS PRESSURE, LOW GAS PRESSURE

j.	Alarm bell and transformer. Alarm to sound in event of: Flame Failure; Low Water; High Water Temperature; Low Oil Pressure; Low Gas Pressure; High Gas Pressure

k.	Manual alarm silencer.

l.	Contacts for alarms.

m.	Modulating motor transformer.

n.	Manual-automatic fuel transfer switch.

o.	UL approved electronic flame safeguard and combustion programming system: Cleaver Brooks CB-70 or Honeywell R-4127 Protectorelay with C-7015A scanner

p.	Lead/lag sequencing switch with rotary selector pilot lights and sequence order indicator. Coordinate with section Automatic Controls of this specification

q.	Numbered terminal strips.

NOTE: CONTROL PANEL WITH DEVICES MUST BE SHOWN ON DRAWING.

D.	Boiler plant control panel, instruments and controls:

1.	Provide smoke indicators and smoke density recorders as specified in sub-section "SMOKE INDICATING AND RECORDING SYSTEM" of this specification

2.	Draft gauge shall have 3-way petcocks, front zero adjustment and 0.01 inch scale divisions to indicate pressure in last pass of furnace, similar to Preferred Instruments Model JC21F

3.	Sequence draft control: Provide drive unit, built-in low draft cutoff with antipuff time delay. Start draft selector shall permit burner lightoff at 20 percent or more of fixed damper opening and field adjustable.

a.	Sensitivity to maintain furnace draft within 0.01 inch wg of set point with adjustable proportional band mechanism to permit filtering-out of furnace pulsation without loss of sensitivity. To open damper to start position before burner can operate. Prove draft by physical sensing and electrical interlock. Maintain fixed operating draft during running periods. Open damper during burner spindown

b.	Close damper upon completion of burner post-purge cycle. Turns in draft sensing pipe lines made with brass plugged tees or crosses. Similar to Preferred Instruments Model JC-21F

4.	Panel shall have common dry contact for remote monitoring of alarms, including 10 spare circuits

5.	Flue gas temperature gauges shall be indicating/monitoring/alarm unit for boiler exit gas temperature. Display range of this digital reading, solid state electronic, thermocouple operated instruments shall be 0-999 deg F. The instrument shall contain internally adjusted set points for inefficient and dangerous temperature levels, pushbutton set point recall, SPDT relays, alarm light with 180 deg visibility, and manual reset. The FGT unit shall be Preferred Instruments series JC-15

6.	Remote reading fuel oil storage tank gauging system as specified in "FUEL OIL TANKS AND SYSTEM"

7.	Alarm bell assembly and manual alarm silencing switch: Alarm to sound for excessive smoke density, excessive flue gas temperature and fuel tank low level

8.	The instrument panel shall be code gauge steel all welded construction. Boiler indicating instruments, recorders and controllers, shall be flush mounted on top panel sector. Panel arrangement and location of each instrument and connecting piping and wiring shall be symmetrical for similar functions. Split front panel access doors shall have full length piano hinges and positive latch handles fitted to panel. All components within the panel shall be mounted on a special perforated metal subplate, with color coded wiring concealed in plastic troughs, and with numbered terminal strips (numbering to be coordinated with boiler manufacturer) for identification of external connections. Sensing lines from panel mounted devices shall be piped to a terminal point on the panel. (Interconnecting external piping from remote components shall be brought to the terminal point by the contractor). Panel shall be prime coated and finished with machine enamel, white inside, gray outside. Provide laminated nameplates for all panel mounted instruments and complete wiring diagrams showing panel terminal connections and interconnections with packaged boilers. Panel shall be mounted on 6 1/2 inch high reinforced bracket legs bolted to the floor. Panel shall be supplied and coordinated by boiler manufacturer.

5)	ACCESSORIES

A.	Smoke indicating and recording system: Provide smoke indicating systems to Preferred Instruments JC-30F or Fireye FE-5. For each boiler, provide complete with light source, photoelectric receiver Ringelmann meter in breeching of boilers and alarm circuits. Locate photoelectric unit and light source unit in breeching of boilers. Provide pressure-tight flanges in breeching ahead of photoelectric receiver and light source to prevent flue gases from entering boiler room. To minimize soot deposits, provide stack units with purging air connections. Mount indicating meter and lamp unit on boiler plant control panel and remove visual alarm at each boiler room exit door

1.	Operation: Alarm to sound and red indicating lamp to light when density of smoke reaches predetermined value. After set time interval of continued smoke excessive level, smoke controller time delay relay will shut burner down requiring manual reset to recycle burner after smoke density has declined to acceptable level. When density of smoke is below this value, green indicating lamp to be lit and red lamp to be out

NOTE: COORDINATE WITH AUTOMATIC CONTROL SYSTEMS SECTION.

2.	Alarm bell shall be as specified under Section "AUTOMATIC CONTROLS SYSTEMS". Provide wiring, relays, voltage regulator transformer required for alarm. Provide photocell wiring in separate conduit or in shielded microphone cable

3.	Density recorders: Provide similar to Fireye Type 55-AMI or Preferred Instruments R88 with continuous 24-hour record of percent smoke density on 12 inch chart. Supply charts for one (1) year operation

NOTE: USE WHERE GAS PRESSURE FROM UTILITY COMPANY IS INSUFFICIENT FOR PROPER BURNER OPERATION. ADD PIPING DETAIL TO DRAWINGS

B.	Gas compressors: Provide centrifugal type with one direct drive pump, flexible coupling motor and motor controller, similar to Riesner or Eclipse Fuel Engineering. Mount on common steel or cast iron base with capacities as scheduled on drawings

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

1.	Operation: Interlock with boiler-burner unit. Compressor operates when one or more gas burners operate. Compressors inoperative when all gas burners are inoperative

C.	Emergency switches: Provide break-glass type, similar to ACME Fire Alarm Co., disconnect switch, for operation of boiler plant control panel main remote control contactor. Break glass to release contactor. Locate outside boiler room exits

D.	Fire extinguishers: Provide two NFPA approved, 2 1/2 gal foam type in boiler room

E.	Provide Portable type Microcomputer Combustion Analyzer to determine oxygen, carbon dioxide, and carbon monoxide concentration within the flue gas and calculate combustion efficiency. Unit shall be similar to Fyrizer Model 200

Part 3 -	EXECUTION

1)	INSTALLATION

A.	Install gas piping from outlet provided under Plumbing Work, with valves and by-passes. Connect to burners and connect to gas compressors, if required

B.	For fuel oil piping, provide valves and by-passes between burners and oil tanks

C.	Pipe drain valves to floor drain.

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

D.	Feeder and disconnect switch for boiler plant control panel will be provided under Electrical Work. Provide all other wiring, including feeder from disconnect switch to panel and circuit breaker, full size of feeder to disconnect switch, wiring from panel to equipment and wiring for controls, burner cutoff switches, interlocks, emergency switches, alarms and as noted

E.	Install wiring in rigid conduit and in conformance with Specifications for Electrical Work

2)	ADJUSTMENT AND CLEANING

A.	Upon completion, clean boilers, breeching, stack and related piping, using cleaner as recommended by boiler manufacturer

B.	Manufacturer of boiler-burner shall provide instructions, supervision, adjustment and services of factory representative to supervise installation of burners and controls and to start up and adjust burners and controls including

1.	Burners for optimum fuel-air ratio over entire operating range

2.	Test individual burner controls for proper operation.

3.	Test safety controls for proper operation.

4.	Test boiler relief valves per manufacturer's recommendation.

5.	Test combustion efficiency over full operating range by means of CO2 analysis and exit gas temperature

6.	Set burner firing rates for specified conditions.

7.	Instruct Owner's designated personnel in operation of equipment. Instruction period: Two 7-hour days

C.	Submit written report by boiler-burner manufacturer to the effect that safety and operating controls and burners are properly installed, calibrated and adjusted

3)	FIELD QUALITY CONTROL

A.	Tests: After installation is completed, test boilers hydrostatically in accordance with ASME recommendations. Test operating and safety controls individually by firing boiler, raising hot water temperature to ascertain proper temperature. Tests shall be witnessed and certified by a representative of the Hartford Steam Boiler Inspection and Insurance Company. Test shall be witnessed by local authorities having jurisdiction