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PSCBoilers

SeriesGas

Installation,Operation &MaintenanceManual

USING THIS MANUAL 1A. INSTALLATION SEQUENCE . . . . . . . . . . . . .1B. SPECIAL ATTENTION BOXES . . . . . . . . . . .1

1. PREINSTALLATION 2

A. ACCESSIBILITY CLEARANCES . . . . . . . . . .2B. CLEARANCE FROM COMBUSTIBLE

CONSTRUCTION . . . . . . . . . . . . . . . . . . . . .2C. LIQUEFIED PETROLEUM (LP) GAS . . . . . . .2

D. INSTALLATION SURVEY . . . . . . . . . . . . . . .2

E. PLANNING THE LAYOUT . . . . . . . . . . . . . . .2

2. BOILER SET-UP 3

3. WATER PIPING AND CONTROLS 4A. BOILER SUPPLY AND RETURN . . . . . . . . . .4B. SAFETY RELIEF VALVE . . . . . . . . . . . . . . . .5C. PIPING FOR ZONED SYSTEMS . . . . . . . . . .6D. EXPANSION TANK . . . . . . . . . . . . . . . . . . . .7E. INDIRECT-FIRED WATER HEATER . . . . . . . .7F. FREEZE PROTECTION . . . . . . . . . . . . . . . . .7

4. VENTING, VENTILATION AND AIR INLET 8

A. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . .8B. PEERLESS WALL THIMBLE . . . . . . . . . . . . .8C. VENT PIPE INSTALLATION- . . . . . . . . . . . . .9D. AIR INLET PIPE INSTALLATION . . . . . . . . .10E. AIR FOR VENTILATION . . . . . . . . . . . . . . .11F. BOILER REMOVAL FROM COMMON

VENTING SYSTEM . . . . . . . . . . . . . . . . . . .11

5. GAS PIPING 12

6. ELECTRICAL 14A. WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . .14

B. ZONED SYSTEM WIRING . . . . . . . . . . . . .14C. CONTROLS . . . . . . . . . . . . . . . . . . . . . . . .14D. SEQUENCE OF OPERATION . . . . . . . . . . .15

7. START-UP PROCEDURES 18A. COMPLETING THE INSTALLATION . . . . . .18B. CONTROL DESCRIPTIONS . . . . . . . . . . . . .21C. ADJUSTMENT OF GAS PRESSURE

REGULATOR . . . . . . . . . . . . . . . . . . . . . . .21D. CHECKING BURNER INPUT . . . . . . . . . . . .21E. CHECK-OUT PROCEDURE . . . . . . . . . . . . .22

8. TROUBLESHOOTING 23A. SHUT-DOWN CAUSED BY PILOT OUTAGE,

PRESSURE SWITCH OR FLAME ROLL-OUT SAFETY SHUT-OFF SWITCH . . . . . . . . . . .23

B. TROUBLESHOOTING GUIDES . . . . . . . . . .23C. MEASURING SUCTION PRESSURE . . . . . .23

9. MAINTENANCE 27A. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . .27B. DAILY (WITH BOILER IN USE) . . . . . . . . . .27C. WEEKLY (WITH BOILER IN USE) . . . . . . . .27D. MONTHLY (WITH BOILER IN USE) . . . . . . .27E. ANNUALLY (BEFORE START OF HEATING

SEASON) . . . . . . . . . . . . . . . . . . . . . . . . . .28

10. BOILER DIMENSIONS & RATINGS 30

11. REPAIR PARTS 32

TABLE OF CONTENTS

TABLE OF CONTENTS

1

A. INSTALLATION SEQUENCEFollow the installation instructions provided in thismanual in the order shown. The order of theseinstructions has been set in order to provide the installerwith a logical sequence of steps that will minimizepotential interferences and maximize safety duringboiler installation.

B. SPECIAL ATTENTION BOXESThroughout this manual you will see special attentionboxes intended to supplement the instructions and makespecial notice of potential hazards. These categoriesmean, in the judgment of Peerless Heater Company:

Indicates special attention is needed, but not directlyrelated to potential personal injury or propertydamage.

NOTICE

Indicates a condition or hazard which will or cancause minor personal injury or property damage.

CAUTION

DANGERIndicates a condition or hazard which will causesevere personal injury, death or major propertydamage.

USING THIS MANUAL

USING THIS MANUAL

Indicates a condition or hazard which may causesevere personal injury, death or major propertydamage.

WARNING

2

A. ACCESSIBILITY CLEARANCESInstall boiler not less than 24″ between the left side, top,and front of the boiler and adjacent wall or otherappliance, when access is required for servicing.

B. CLEARANCE FROM COMBUSTIBLE CONSTRUCTIONThe design of this boiler is certified for closet installationwith the following clearances:

1. 6″ between right side, front and combustibleconstruction.

2. 12″ between top of jacket and combustibleconstruction.

3. 1” between left side, rear and combustibleconstruction.

4. 2″ between vent pipe and combustible construction.5. 0” between wall thimble and combustible

construction.6. This boiler is design certified for use on combustible

flooring.

C. LIQUEFIED PETROLEUM (LP) GASThe following LP requirements from the UniformMechanical Code, section 304.6, may be in effect inyour geographic area:

“Liquefied petroleum gas-burning appliances shallnot be installed in a pit, basement or similar locationwhere heavier-than-air gas might collect. Appliancesso fueled shall not be installed in an above-gradeunder-floor space or basement unless such locationis provided with an approved means for removal ofunburned gas.”

D. INSTALLATION SURVEYFor new and existing installations, a Water InstallationSurvey is available from Peerless Heater Company. Thesurvey will provide information on how a hot waterboiler works with your specific system and will providean overview of hot water system operation in general.

You can also use this survey to locate system problemswhich will have to be corrected. To obtain copies of theWater Installation Survey, contact your Peerlessrepresentative.

E. PLANNING THE LAYOUTPrepare sketches and notes of the layout to minimize thepossibility of interferences with new or existingequipment, piping, venting and wiring. Reviewlimitations on vent pipe, vent terminal, and air inlet pipelocations and ventilation air requirements in Section 4.

PREINSTALLATION

1. PREINSTALLATIONRead carefully, study these instructions before beginning work.

This boiler must be installed by a qualified contractor.

The boiler warranty can be voided if the boiler is not installed, maintained and serviced correctly.

The equipment must be installed in accordance with those installation requirements of the authority having jurisdiction or, in the absence of such requirements, to the current edition of the National Fuel Gas Code , ANSIZ223.1/NFPA 54.

Where required by the authority having jurisdiction, the installation must conform to American Society ofMechanical Engineers Safety Code for Controls and Safety Devices for Automatically Fired Boilers, ASME CSD-1.

NOTICE

Do not install this boiler on carpeting. Boilerinstallation on carpeting is a fire hazard. Install thisboiler on non-combustible flooring or use acombustible floor pan to install this boiler on othernon-carpeted flooring.

DANGER

Liquefied Petroleum (LP) is heavier than air and maycollect or “pool” in a low area in the event of a leakfrom defective equipment. This gas may then ignite,resulting in a fire or explosion. See the instructionsbelow.

WARNING

3

BOILER SET-UP

1. Provide a sound, level foundation. Locate boiler asnear to the chimney or outside wall as possible andcentralized with respect to the heating system.

2. Locate boiler in front of installation position before removing crate.

4. Separate the wood shipping pallet from the boilerbase by removing two (2) hold-down bolts at eachend of the boiler base.

5. Move boiler into final position.

2. BOILER SET-UP

4

A. BOILER SUPPLY AND RETURN

1. Size the supply and return to suit the system. Atypical piping arrangement is shown in Figure 1.Refer also to the I=B=R Installation Guide No. 200and the Peerless Water Survey for additionalguidance during water piping installation.

2. Return Piping:a. For boilers equipped with a factory-mounted

circulator, pipe the return to the inlet connectionof the circulator.

b. For boilers equipped with a separate, unmountedcirculator, pipe the outlet connection of thecirculator to a tee, provided with a drain valve, atthe 1-1/4 NPT return tapping near the bottom ofthe right section. Pipe the return to the inletconnection of the circulator.

3. Supply Piping:a. Pipe the supply to the 1-1/2 NPT supply tapping

at the top of the boiler.

b. Provide clearance to venting system (see Section4).

4. When system return water temperature will be below130°F, pipe the boiler with a bypass arrangement toblend the system return and hot supply to obtain atleast 130°F entering the boiler. For more informationon bypass piping, consult the Peerless Water Survey.

5. If desired, install the circulator in the alternatelocation shown in Figure 1. Consult the PeerlessWater Survey for more information on circulatorlocation.

3. WATER PIPING AND CONTROLS

Figure 1: Supply and Return Piping

WATER PIPING AND CONTROLS

6. Install this boiler so that the gas ignition systemcomponents are protected from water (dripping,spraying, etc.) during appliance operation andservice (circulator replacement, condensate trap,control replacements, etc.).

7. If this boiler and distribution system is used inconjunction with a refrigeration system, pipe thechilled medium in parallel with the boiler and installthe proper valve to prevent the chilled medium fromentering the boiler. A drawing illustrating this hook-up is provided in Figure 2.

8. When the boiler is connected to heating coils locatedin air handling units where they may be exposed torefrigerated air circulation, install flow control valvesor other automatic means to prevent gravitycirculation of the boiler water during the coolingcycle.

9. If this boiler is installed above radiation level,provide a low water cutoff device, either as a part ofthe boiler or at the time of boiler installation.

B. SAFETY RELIEF VALVE

1. Locate safety relief valve and fittings in bagassembly.

2. If air elimination is not required at the safety reliefvalve tapping, install valve and piping as shown inFigure 3.

3. For air elimination at the safety relief valve tapping,install valve and piping as shown in Figure 4.

Pipe the discharge of safety relief valve to preventinjury in the event of pressure relief. Pipe thedischarge to a drain. Provide piping that is the samesize as the safety relief valve outlet.

CAUTION

Figure 4: Safety Relief Valve Hook-Up withAir Elimination

Figure 3: Safety Relief Valve Hook-Up Installationwith Air Elimination in System Piping

Figure 2: Parallel Hook-up with Water Chiller


5

6

C. PIPING FOR ZONED SYSTEMS

1. See Figures 5 and 6 for basic zoned system layouts.

2. Run each zone pipe down then up to zone toprevent air accumulation in piping.

3. If required, provide means to isolate and drain eachzone separately.

Figure 5: Zone Piping with Zone Valves

Figure 6: Zone Piping with Circulators


D. EXPANSION TANK

1. Consult the tank manufacturer’s instructions forspecific information relating to tank installation. Sizethe expansion tank for the required system volumeand capacity. See Table 9 in Section 10 for boilerwater capacity.

2. Expansion tanks are available with built-in fill valvesand check valves for reducing supply water pressureand maintaining minimum system pressure. Checkthe design features of the tank and provide valves asnecessary.

Refer back to Figure 1 for typical expansion tank piping.

E. INDIRECT-FIRED WATER HEATERIf the boiler is to be used in conjunction with an indirect-fired water heater, refer to Figure 7 for typical piping.Follow the instructions provided by the water heatermanufacturer. Pipe the water heater as a separate zone.

F. FREEZE PROTECTIONFor new or existing systems that must be freeze-protected:

1. Glycol in hydronic applications is speciallyformulated for this purpose. It includes inhibitorswhich prevent the glycol from attacking metallicsystem components. Make certain that the systemfluid is checked for the correct glycol concentrationand inhibitor level.

2. The antifreeze solution should be tested at least oncea year and as recommended by the antifreezemanufacturer.

3. Antifreeze solutions expand more than water. Forexample, a 50% by volume solution expands 4.8%in volume for a temperature increase from 32°F to180°F, while water expands 3% with the sametemperature rise. Allowance must be made for thisexpansion in system design.

4. For more information, consult the Peerless WaterInstallation Survey and the antifreeze manufacturer.

Figure 7: Typical Piping with Indirect-Fired Water Heater


7

Use only inhibited propylene glycol solutions of up to50% by volume with water. Ethylene glycol is toxicand can attack gaskets and seals used in hydronicsystems.

WARNING

8

A. GENERALInstall vent system in accordance with Part 7, Venting ofEquipment, National Fuel Gas Code, ANSI Z223.1/NFPA54 or applicable provisions of the local building codes. –

B. PEERLESS WALL THIMBLE

1. Determine vent cap (terminal) location.

a. Must be within the maximum and minimum ventand air intake lengths shown in Table 1.

b. Maximum wall thickness for the 19-1/2” longPeerless Wall Thimble (standard) is 11-1/2”.Maximum wall thickness for the optional 28”long thimble is 20”.

c. Provide 2” clearance between vent pipe andcombustible construction. No clearance isrequired between Thimble and combustibleconstruction.

d. Provide 3 feet clearance above any forced airinlet within 10 feet.

e. Provide 1 foot clearance below, 1 foot beside, or1 foot above any door, window, or gravity airinlet into any building.

f. Provide 1 foot clearance between bottom of ventterminal and ground level and normal snowlines.

g. Provide 4 feet horizontal clearance from, and inno case above or below, unless a 4 foothorizontal distance is maintained, from electricmeters, gas meters, regulators and reliefequipment.

h. Do not locate vent terminal over public walkwayswhere condensate could create a nuisance orhazard.

i. When adjacent to a public walkway, locate ventterminal at least 7 feet above grade.

j. Do not locate directly under roof overhangs toprevent icicles from forming.

2. Cut a 5-1/8” square hole in sidewall to allow PeerlessWall Thimble to go through.

3. Insert Thimble from inside wall with 4” diameter airinlet connection facing down. Extend Thimble 3-1/2”past outside wall surface. The cut-out opening ofthimble is pointed down.

4. VENTING

Figure 8: Peerless Wall Thimble

VENTING, VENTILATION AND AIR INLET

This vent system will operate with a positivepressure in the vent pipe. Do not connect ventconnectors serving appliances vented by naturaldraft into any portion of mechanical draft systemsoperating under positive pressure.

Flue gases will condense as they exit the venttermination. This condensate can freeze on exteriorbuilding surfaces which may cause discoloration ofthese surfaces.

NOTICE

WARNING

4. Use a minimum 2-1/2” foot piece of 3” diameterAL29-4C stainless steel vent pipe for insertionthrough Wall Thimble. See Vent Pipe section belowfor vent pipe requirements.

5. Slide Stainless Steel Collar over vent pipe and slide3” diameter hose clamp and collar to vent pipe.

6. Insert pipe with collar through Outside Vent Cap andslide 3” diameter hose clamp and collar to vent pipe.

7. Leave at least 2” of vent pipe protruding beyondface of Vent Cap and secure hose clamp and collarto vent pipe.

8. Place Outside Vent Cap over Wall Thimble with airopenings in Vent Cap facing down. Secure Cap toThimble with #10 sheet metal screws.

9. Place 3” diameter hose clamp over pipe protrudingthrough inside of Wall Thimble.

10. Place Inside Thimble Cap and Collar onto WallThimble. Access hose clamp through 4” diametercollar on bottom of Thimble and secure hose clampover collar and vent pipe as per step 7 above.

11. Secure Inside Thimble cap to Wall Thimble with #10screws. Seal Thimble Cap perimeter with silicone.

12. Seal all openings between Wall and Thimble andaround the 3” diameter stainless steel vent pipe thatprotrudes through inside and outside of WallThimble.

13. Add any bracing that may be needed to support WallThimble on inside of wall structure.

14. Secure Outside Vent Cap to exterior wall with four#10 sheet metal screws provided.

15. Attach Z-Flex #02-SVSTPX03 terminal to protrudingvent pipe. Refer to Figure 10. To attach to HEAT-FABpipe, insert into pipe end and fold over tabs tosecure. Otherwise, silicone terminal to vent pipe.C.VENT PIPE INSTALLATION

C. VENT PIPE INSTALLATION

1. For minimum and maximum vent pipe lengths seeTable 1.

2. Use only 3” diameter Heat-Fab Saf-T Vent, Z-Flex Z-Vent, ProTech FasNSeal, or Flex-L Star-34 TypeAL29-4C stainless steel vent pipe and fittings forventing of flue gases from the boiler.

3. Connect vent pipe to boiler by spreading a 1/4” beadof high-temp GE-106 silicone around the fanadapter. Attach proper vent adapter to fan adapter(not applicable, Z-Flex). Z-Flex vent pipe/fittingconnects directly to fan adapter, secure to fanadapter using Z-Flex lock band. See Figure 9.

5. Attach remaining pipe and fittings per eachmanufacturer’s vent instructions. Use only thesilicone recommended by vent pipe manufacturers.Maintain proper clearance to combustibleconstruction - see Section 1, Preinstallation.

6. Horizontal lengths of the vent pipe shall slope downnot less than 1/4” per foot from the boiler to the ventterminal. If vent pipe does slope back toward boiler,it is required that a horizontal drain tee be providedand piped to a container or drain.

7. Support horizontal portions of the venting system toprevent sagging by use of metal strapping orequivalent means. Locate supports at not more thanfour (4) foot intervals.


9

52 feet52 feet45 feet45 feet

PSC-03PSC-04PSC-05PSC-06

Boiler Model


Table 1:

*Equivalent Length of 3” DiameterStainless Steel Vent Pipe

Minimum Vent Length Maximum Vent Length



Boiler Model


Table 2:

*Equivalent Length of 4” DiameterAluminum/Galvanized Air Inlet Pipe

Minimum Length Maximum Length

*Reduce the equivalent lengths by 5 feet for each 90 degree elbow added.

10


Figure 10: Boiler Vent/Air Intake System

Figure 9: Vent Connection to Boiler

D. AIR INLET PIPE INSTALLATION

1. For maximum air inlet pipe lengths see Table 2.

2. Use only 4” diameter galvanized pipe or 4” diameterflexible aluminum vent for supplying combustion air toboiler inlet air box.

3. Boiler connection can be from either right or left sideof boiler jacket. Determine which jacket side air inletpiping is to be routed and remove the 4-1/2” jacketknock-out.

4. Attach a 4” diameter 90 degree elbow to top of airbox.

5. Connect air inlet piping from boiler to 4” diametercollar on bottom of Wall Thimble.

6. Slope horizontal sections down not less than 1/4” perfoot from boiler to Peerless Wall Thimble.

7. Support horizontal sections to prevent sagging by useof metal strapping or equivalent means. Locatesupports at no more than four (4) foot intervals.

8. Seal all connections using silicone.

9. To prevent condensation from forming on exposedportions of Wall Thimble and 4” diameter air inletpiping, wrap exposed areas with insulation.

11

E. AIR FOR VENTILATION

1. Provide air openings for adequate ventilation inaccordance with Section 5.3, Air for Combustionand Ventilation, of the National Fuel Gas Code,ANSI Z223.1, or applicable provisions of the localbuilding codes. Ventilation is required to preventoverheating of the controls which greatly reduces thelife of the controls. Air inlet piping provides onlycombustion air to the boiler. See Section D for AirInlet Piping requirements.

2. Definition:

Unconfined Space: a space whose volume is notless than fifty (50) cubic feet per 1000 Btu/hr of thetotal input rating of all appliances installed in thatspace. Rooms communicating directly with the spacein which the appliances are installed, throughopenings not furnished with doors, are consideredpart of the unconfined space.

3. Appliances Located in Unconfined Spaces:For installations in unconfined spaces, the supply ofair for ventilation can usually be consideredadequate.

Appliances Located in Confined Spaces:

Provide two permanent openings communicatingdirectly with an additional room or rooms of sufficientvolume so that the combined volume of all spaces meetsthe criteria for an unconfined space. Use the total inputof all gas utilization equipment installed in the combinedspace in making this determination.

Size each opening with a minimum free area of onesquare inch per 1000 Btu/hr. of the total rating of all gasutilization equipment in the confined space, but not lessthan 100 square inches. Begin with one opening 12inches from the top, and begin the other opening within12 inches of the bottom of the enclosure. See Figure 11.Provide air openings with minimum dimensions not lessthan three (3) inches.

F. BOILER REMOVAL FROM COMMONVENTING SYSTEM

At the time of removal of an existing boiler, follow thesesteps with each appliance remaining connected to thecommon venting system placed in operation, while theother appliances remaining connected to the commonventing system are not in operation:

a. Seal any unused openings in the common ventingsystem.

b. Visually inspect the venting system for proper sizeand horizontal pitch and determine there is noblockage or restriction, leakage, corrosion and otherdeficiencies which could cause an unsafe condition.

c. Insofar as is practical, close all building doors andwindows and all doors between the space in whichthe appliances remaining connected to the commonventing system are located and other spaces of thebuilding. Turn on any clothes dryers and anyappliance not connected to common venting system.Turn on any exhaust fans, such as range hoods andbathroom exhausts, so they will operate at maximumspeed. Do not operate a summer exhaust fan. Closefireplace dampers.

d. Place in operation the appliance being inspected.Follow the lighting instructions. Adjust thermostat soappliance will operate continuously.

e. Test for spillage at the draft hood relief opening after5 minutes of main burner operation. Use the flameof a match or candle, or smoke from a cigarette,cigar, or pipe.

f. After it has been determined that each applianceremaining connected to the common venting systemproperly vents when tested as outlined above, returndoors, windows, exhaust fans, fireplace dampers andany other gas-burning appliance to their previousconditions of use.

g. Any improper operation of the common ventingsystem should be corrected so that the installationconforms with the National Fuel Gas Code. Whenresizing any portion of the common venting system,the common venting system should be resized toapproach minimum size as determined using theappropriate tables in Part 11 of the National FuelGas Code.


12" max

3" min

3" min

12" max

TWO AIR OPENINGS:Minimum

Free Area Each =1 in per 1000 Btuh

at Least 100 in

2

2

BOILERBOILER

Figure 11: Air Openings

1. Size and install the gas supply piping properly inorder to provide a supply of gas sufficient to meetthe maximum demand without undue loss ofpressure between the meter and the boiler.

2. Determine the volume of gas to be provided to theboiler in cubic feet per hour. To obtain this value,divide the Btu per hour rating (on the boiler ratingplate) by the heating value of the gas in Btu percubic feet. Obtain the heating value of the gas fromthe gas supplier. As an alternative, use Table 3 or 4on the next page to obtain the volume of gas to beprovided to the boiler.

3. Use the value obtained above as the basis for pipingsizing. Size the gas piping in accordance with Table5. Consult the National Fuel Gas Code for othersizing options.

4. Locate the drop pipe adjacent to, but not in front ofthe boiler.

5. Install a sediment trap. See Figure 12. Locate a teein the drop pipe at same elevation as the gas inletconnection to the boiler. Extend the drop pipe to apipe cap.

6. Install a ground joint union ahead of the gas controlassembly to permit servicing of the control. Somelocal codes require an additional service valve whenusing the combination gas controls. If your coderequires such a valve, a suggested location is shownin Figure 12.

7. Check piping for leaks prior to placing the boiler inoperation.

Use an approved gas detector, a non-corrosive leakdetection fluid or other leak detection method. Ifleaks are found, turn off all gas flow and repair asnecessary.

8. Disconnect the boiler and its individual shut-off valvefrom the gas supply piping system during anypressure testing of that system at test pressure inexcess of 1/2 psig (3.5 kPa).

Isolate the boiler from the gas supply piping systemby closing its individual service valve during anypressure testing of the gas supply piping system attest pressure equal to or less than 1/2 psig (3.5 kPa).

9. Minimum permissible supply pressure for purposes ofinput adjustment (Inches Water Column):

Natural Gas 5.0″LP Gas 11.0″

Maximum permissible supply pressure to the boiler(Inches Water Column):

Natural Gas 13.5″LP Gas 13.5″

5. GAS PIPING

Figure 12: Gas Connection to Boiler

When checking for leaks, do not use matches,candles, open flames or other methods that provide asource of ignition. This can ignite a gas leak,resulting in fire or explosion.

WARNING

Use a pipe joint sealing compound that is resistant tothe action of liquefied petroleum gas. A non-resistantcompound may lose sealing ability in the presence ofthis gas, resulting in a gas leak and fire or explosionpotential.

WARNING

Do not subject the gas valve to more than 1/2 psipressure. Doing so may damage the valve.

CAUTION

GAS PIPING

12

13

Table 5: Pipe Capacity

102030405060

PipeLength

Feet

278190152130115105

³⁄₄″″Pipe

520350285245215195

1″″Pipe

1,050730590500440400

1¹⁄₄″″Pipe

1,6001,100890760670610

1¹⁄₂″″Pipe

Multipliers to be used with the above table when thespecific gravity of the gas is other than 0.60:Specific Gravity . . .0.5 0.55 0.60 0.65 0.70Multiplier . . . . . . . .1.10 1.04 1.00 0.962 0.926

Capacity of pipe of different diameters and lengths in cu. ft. perhour with pressure drop of 0.3 in. and specific gravity of 0.60.No allowance for an ordinary number of fittings is required.

Table 3: Natural Gas


Model Input(Cubic Ft/Hr)

70105140175

Based on 1000 Btu/Cubic Ft.

Table 4: LP Gas


Model Input(Cubic Ft/Hr)

28425670

Based on 2500 Btu/Cubic Ft.

GAS PIPING

14

A. WIRING

1. See Figure 13 for location of wiring and controls.Use Figure 14 to connect the boiler to a powersupply and to connect components to the boiler.

2. Connect the boiler by a separate, permanently liveelectrical supply line with a fused switch.

3. Adjust the thermostat heat anticipator to 0.2 Amp.

B. ZONED SYSTEM WIRING

See Figure 16 for typical wiring with zone valves. SeeFigure 17 for typical wiring with zone circulators. Whenwiring a zoned heating system, follow all applicablecodes, ordinances and regulations.

C. CONTROLS

1. For proper location of controls and accessories referto Figure 13.

2. See the attached control sheets for specific detailsregarding the installation of the various controls.

3. This boiler is supplied with safety devices in additionto the limit. For a description of these devices andhow they work to ensure the safe operation of theboiler, see Section 7.

4. If the circulator is mounted in the supply piping,provide longer wiring harness as required.

ELECTRICAL

6. ELECTRICAL

This unit when installed must be electrically grounded in accordance with the requirements of the authorityhaving jurisdiction or, in the absence of such requirements, with the current edition of the National ElectricalCode, ANSI/NFPA 70.

NOTICE

Figure 13: Wiring, Controls and Safety Devices

Install all electrical wiring in accordance with the National Electrical Code and local requirements.

Do not power zone valves directly from the boilertransformer. Doing so will greatly reduce the life ofthe transformer. Use a separate transformer sized tohandle the total of all zone valve electrical loads.

NOTICE

15

D. SEQUENCE OF OPERATION

1. Thermostat calls for heat, energizes R8285 ControlRelay (CR).

2. R8285 Control Relay (CR) energizes circulator.

3. Limit senses boiler water temperature. Preventsboiler operation until water temperature fallsapproximately 15°F below the cut-out temperature.

4. Limit energizes Fan and R4222 Isolation Relay (IR).

5. Negative pressure induced by fan switches PressureSwitch, continuing power through closed R4222contacts (IR-1) and flame roll-out switch.

6. Gas valve energizes.a. Igniter on.

b. Pilot gas on, igniting pilot.

7. Pilot flame detected.a. Igniter on.

b. Pilot gas on, igniting pilot.

Note: If pilot flame is not detected within 30 seconds,the igniter is turned off for 30 seconds, and then turnedback on for another 30 seconds. If the pilot remainsundetected in this second ignition period, the igniter andpilot are turned off for 5 minutes. The sequence thenresumes at Step 6a.

8. Call for heat ends.a. Pilot and main gas off, extinguishing pilot and

main burners.

b. Fan and circulator off.

Figure 14: Wiring and Connection Diagram

ELECTRICAL

16

Figure 15: Ignition System Operating Sequence

ELECTRICAL

17

ELECTRICAL

Figure 16: Zone Wiring with Zone Valves

Figure 17: Zone Wiring with Circulators

18

A. COMPLETING THE INSTALLATION

1. Confirm that all water, gas and electricity areturned off.

2. Inspect the boiler combustion chamber for foreignobjects and remove if present.

3. Check physical condition of burners and pilot. Makecertain that there are no unusual bends orperforations in the burners or pilot. Replacecomponents if necessary.

4. Verify that water piping, venting, gas piping andelectrical wiring and components are installedproperly. Refer back to previous sections of theseinstructions as well as equipment manufacturer’sinstructions as necessary.

5. Fill the boiler and system with water, making certainto vent all air from all points in the system. To checkwater level in the system, open and close each ventin the system. Water should exit from each ventwhen it is opened.

6. The pressure reducing valve on the fill line willtypically allow the system to be filled and pressurizedto 12 psi. Consult the valve and expansion tankmanufacturer for more specific information.

7. Check joints and fittings throughout the system forleaks. If leaks are found, drain the system and repairas required.

8. Connect a manometer to the 1/8” npt inlet pressuretap on the gas valve. See figure 19.

9. Confirm that the gas supply pressure to the boiler isabove the minimum and below the maximum valuesfor the gas being used. See the end of Section 5 forthese values. If a supply pressure check is required,isolate the boiler and gas valve before performingthe pressure check. If the supply pressure is too highor too low, contact the gas supplier.

10. Turn on electricity and gas to boiler.

11. Light the boiler by following the Lighting/OperatingInstructions label mounted to the jacket panel. Theinitial ignition may require several tries as the pipingis purged of air.

12. Use the sequence description and Figure 15 inSection 6 (Electrical) to follow light-off and shutdownsequences and to assist in diagnosing problems. Ifthe boiler does not function properly, consult Section8, Troubleshooting.

13. The gas manifold and control assembly providedwith this boiler meet with all criteria regarding safelighting and performance as specified in ANSIZ21.13, Gas-Fired Low-Pressure Steam and HotWater Boilers. The gas manifold and controlassembly are made of gas-tight, completely factoryassembled and installed components of the baseassembly. See Figure 18.

START-UP PROCEDURES

7. START-UP PROCEDURES

19

Figure 18: Gas Valve, Manifold and Burner Assembly – Intermittent Ignition

Figure 19: Valve Tapping and Adjustment Screw Locations

START-UP PROCEDURES

20

START-UP PROCEDURES

Figure 20: Operating Instructions

B. CONTROL DESCRIPTIONSSee Figure 13 in Section 6 (Electrical) for locations ofthese devices.

1. FLAME ROLL-OUT SAFETY SHUT-OFF SWITCH(FLAME ROLL-OUT SWITCH) – A thermallyactivated switch located between the first burnerfrom the left and the manifold bracket. The flameroll-out safety shut-off switch will sense excessivetemperature caused by continued flame roll-out andshut down main burner gas. This is a non-recyclingswitch that must be replaced once it has beenactivated and the cause of the roll-out eliminated.

2. DIFFERENTIAL PRESSURE SWITCH – This devicesenses a negative or suction pressure in the blowerhousing and air box when the blower is energized. Ifthere is not excessive blockage in the venting systemor air inlet vent the switch will close, allowing powerto energize the ignition system.

3. LIMIT – A thermally activated, manually adjustableswitch located on the right side of the boiler. Thetemperature sensing element is placed in the supplyand will shut down main burner gas if the supplywater exceeds the preset temperature limit. This is arecycling switch that will automatically reset whenthe supply water falls below the preset temperature.

4. LOW WATER CUT-OFF (FOR GRAVITY SYSTEMSOR HOT WATER BOILERS INSTALLED ABOVERADIATION LEVEL) – A level-sensing device (floator probe) located in supply piping near the boiler. Ifwater level in the system drops below the control’sposition, it will shut down main burner gas. Thecontrol will automatically reset once the water levelrises above its position.

C. ADJUSTMENT OF GAS PRESSUREREGULATOR

1. Using the manometer setup installed in part 7A, setmanifold pressure as follows for various gases.a. Natural Gas . . . . . . . . . .3.5″ Water Column

b. LP Gas . . . . . . . . . . . .10.0″ Water Column

2. To adjust gas pressure, turn adjusting screw of gaspressure regulator counterclockwise to decreasepressure, clockwise to increase pressure. Refer toFigure 19 for location of gas pressure regulator.Replace the cap screw when adjustment is complete.

3. In no case should the final manifold pressure varymore than ±0.3 inches water column from theabove specified pressures. Any necessary majorchanges in the flow should be made by changing thesize of the burner orifice spuds.

4. When adjustment is complete, turn off boiler, gasflow and electricity to boiler. Remove manometerconnection from valve and plug tapping with plugprovided. Turn utilities back on and resumecheckout.

D. CHECKING BURNER INPUT

1. Refer to rating label mounted on the jacket top panelto obtain the rated BTU per hour input. In no caseshall the input to the boiler exceed the value shownon the rating label.

2. Check input by use of the following formula(Peerless suggests reading meter for 2 Cu.Ft.):

BTU/Hr. Input=3600 x F x HT

3600 – Seconds per hourF – Cubic Feet of Gas Registered on MeterH – Heat Value of Gas in BTU/Cubic FeetT – Time in Seconds the Meter is Read

3. As an alternative, use Table 6. Use the heating valueprovided by gas supplier. Use a stopwatch to recordthe time it takes for 2 cubic feet of gas to passthrough the meter. Read across and down todetermine rate.

START-UP PROCEDURES

21

22

Burner inputs in Btu/hr for various meter timings andheat values. (Tables based on 2 cubic feet of gas throughmeter).

E. CHECK-OUT PROCEDURE

1. After starting the boiler, be certain all controls areworking properly. Check to be sure that the limit willshut off the boiler in the event of excessive watertemperature. This can be done by lowering the limitsetting until the main burners shut down. Whenproper limit function is confirmed, return the dial toits previous setting.

2. To check operation of the ignition system safetyshut-off features:a. Turn gas supply off.

b. Set thermostat or controller above roomtemperature to call for heat. Watch for igniterglow at pilot burner.

c. Igniter will continue to glow for 30 seconds, de-energize for 30 seconds, then re-energize andglow for another 30 seconds. It will then de-energize for 5 minutes before restarting thesequence.

d. Turn gas supply on.

e. Reset the boiler and control by followingOperating Instructions.

f. Observe boiler operation through one completecycle.

3. Low Water Cut-Off (if used) – Consult themanufacturer’s instructions for the low water cut-offoperational check procedure.

4. Check the system to make sure there are no leaks oroverfilling problems which might cause excessivemake-up water to be added. Make-up water causesliming in the boiler and brings in oxygen. Oxygencan cause severe damage to the boiler thoughoxygen corrosion pitting.

5. Check the expansion tank and automatic fill valve (ifused) to confirm that they are operating correctly. Ifeither of these components causes high pressure inthe system, the boiler relief valve will weep or open,allowing fresh water to enter the system.

6. Do not allow the system controls to subject the boilerto excessively low water temperatures, which wouldcause condensation of flue gases and corrosion ofthe boiler. Operate the boiler at a temperature above130°F. Adjust the boiler limit as required to maintainboiler temperature above this level.

7. Check the general condition of the system includingpiping support, joints, etc. Check cleanliness of theradiators, baseboard units and/or convectors. Cleanthem to the extent possible. If radiators do not heatevenly, vent any remaining air from them.

8. Review operation and User’s Information Manualwith end-user.

9. Complete the Warranty Card and submit it toPeerless Heater Company.

10. Hang the Installation, Operation and MaintenanceManual, User’s Information Manual, and VentManufacturer’s Information Manual in an accessibleposition near the boiler.

START-UP PROCEDURES

2880002400002057141800001600001440001309091200001107691028579600090000847068000075789720006857165455626096000057600

253035404550556065707580859095

100105110115120125

2952002460002108571845001640001476001341821230001135381054299840092250868248200077684738007028667091641746150059040

30240025200021600018900016800015120013745512600011630810800010080094500889418400079579756007200068727657396300060480

Heat Value of Gas(Btu/cubic foot)

1000 1025 1050

Time thatmeter is

read (sec)

Table 6: Meter Conversion – Natural Gas

23

A. SHUT-DOWN CAUSED BY PILOT OUTAGE, PRESSURE SWITCH ORFLAME ROLL-OUT SAFETY SHUT-OFF SWITCHIn the event of a shut-down caused by a pilot outage,action of the pressure switch or flame roll-out safetyshut-off switch effecting a shut-down of the mainburners:

a. Refer to the Lighting/Operating Instructions in Figure20 to properly turn off the gas to the boiler.

b. Turn off all electric power to the boiler.c. Call a qualified heating service organization or local

gas company and have the cause of the shut-downinvestigated and corrected.

d. Refer to Operating Instructions tore-start boiler.

B. TROUBLESHOOTING GUIDES

Use Table 7 and Figure 22 to assist in determiningcauses and providing corrective actions to boilerproblems. These guides must be used only by qualifiedservice technicians. These individuals must follow allapplicable codes and regulations in repair of any boilerproblems.

C. MEASURING SUCTION PRESSURE

Pressure switch requires minimum -0.45 W.C. fansuction pressure to energize control circuit. Measurewhen boiler has been operating at least 15 minutes. SeeFigure 21.

TROUBLESHOOTING

8. TROUBLESHOOTING

Should overheating occur or the gas supply fail toshut off, do not turn off or disconnect the electricalsupply to the pump. This may aggravate the problemand increase the likelihood of boiler damage. Instead,shut off the gas supply at a location external to theappliance.

CAUTION

Do not use this appliance if any part has been underwater. Improper or dangerous operation may result.Immediately call a qualified service technician toinspect the boiler and to replace any part of thecontrol system and any gas control which has beenunder water.

WARNING

Label all wires prior to disconnection when servicingcontrols. Wiring errors can cause improper anddangerous operation. Verify proper operation afterservicing.

CAUTION

When servicing or replacing items that communicatewith the boiler water, be certain that:

●● There is no pressure on the boiler.●● The boiler is not hot.●● The power is off.

When servicing the gas valve or pilot, be certain that:●● The gas is off.●● The electricity is off.

DANGER

24

Figure 21: Measuring Fan Suction Pressure

TROUBLESHOOTING

25

TROUBLESHOOTING

Table 7: Boiler Troubleshooting Guide (Burners Functioning)

PROBLEM POSSIBLE CAUSES CORRECTIVE ACTIONS

1. See Figure 22Burners not functioning. 1. See Figure 22

1. Defective gas valve.

2. Short circuit.

Burners will not shutdown.

1. Use Figure 22 to troubleshoot intermittentignition gas valve. Replace if necessary.

2. Check and correct wiring.

1. Manifold gas pressure too low.2. Improperly sized/drilled orifice spuds.3. Leaking gas valve.4. Burrs on orifice.5. Low supply gas pressure.

Flashback or burningat orifice spuds.

1. Adjust to proper pressure.2. Install correct spuds.3. Replace valve.4. Remove burrs.5. Contact gas supplier if natural gas. Adjust

regulator if LP gas.

1. Insufficient pilot flame.2. Pilot burner/orifice clogged.3. Overfiring.4. Misaligned burners or pilot.

Delayed ignition. 1. Increase pilot gas flow.2. Clean pilot burner and orifice.3. Reduce rate to input on rating label.4. Realign burners or pilot.

1. Vent pipe not sloped towards vent terminal.Condensation at boilervent connector/fan.

1. Install condensate trap per vent manufacturer’s. instructions.

2. Slope vent pipe towards vent terminal.

1. Underfiring.2. Limit set too low.3. Air in system.4. Circulator malfunctioning.5. Circulation system clogged.

6. Incorrect thermostat heat anticipator setting.

Boiler not heatingproperly.

1. Increase rate to input on rating label.2. Reset limit to higher setting.3. Vent air from all points in system.4. Check circulator, replace if necessary.5. Shut down and cool boiler, drain and flush

system.6. Adjust heat anticipator.

1. Leaks in gas piping or fittings.2. Leaks in gas service line or meter.3. Leaks in venting system.4. Overfiring.

Fumes or gas odors 1. Locate and repair or replace.2. Shut down boiler and notify gas provider.3. Locate and repair or replace.4. Reduce rate to input on rating label.

Figure 22: Boiler Troubleshooting Guide (Burners Not Functioning)

26

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A. GENERAL

1. Disconnect this boiler from the gas supply pipingduring any pressure testing of the gas system.

2. Check pipes adjacent to cold walls or in unheatedspaces. Insulate and tape them if necessary to besure they can’t freeze up. Keeping the water movingat all times will reduce the likelihood of freezing. SeeSection 3 for antifreeze instructions.

3. If there is considerable foreign matter in the boilerwater, the boiler should be shut down and allowed tocool, then drained and thoroughly flushed out. Usethe drain valve at the bottom of the returnconnection to drain the boiler. Pipe the drain cock toa suitable drain or containment device if antifreeze isused. Flush the system to remove remaining matter.If there is evidence that hard scale has formed on theinternal surfaces, the boiler should be cleaned bychemical means as prescribed by a qualified watertreatment specialist.

B. DAILY (WITH BOILER IN USE)Daily boiler observation can be performed by the owner.If any potential problems are found, a qualified installeror service technician/agency must be notified.

1. Remove any combustible materials, gasoline andother flammable liquids and substances that generateflammable vapors from the area where the boiler iscontained. Make certain that the boiler area hasample air for ventilation and that there are noobstructions to the free flow of air to and from theboiler.

2. Observe general boiler conditions (unusual noises,vibrations, etc.)

3. Observe operating temperature and pressure on thecombination gauge located on the right side of theboiler. Boiler pressure should never be higher than5 psi below the rating shown on the safety reliefvalve (25 psig maximum for a 30 psig rating, 45 psigmaximum for a 50 psig rating). The valve rating canbe found on the top of the safety relief valve (seeFigure 3 for location of the safety relief valve). Boilertemperature should never be higher than 250° F.

4. Check for water leaks in boiler and system piping.

5. Smell around the appliance area for gas. If you smellgas, follow the procedure listed in the OperatingInstructions to shut down appliance in Figure 20.

C. WEEKLY (WITH BOILER IN USE)

1. Flush float-type low-water cut-off (if used) to removesediment from the float bowl as stated in themanufacturer’s instructions.

D. MONTHLY (WITH BOILER IN USE)

1. Check boiler room floor drains for properfunctioning.

2. Check function of the safety relief valve (monthlyunless specified otherwise by manufacturer) byperforming the following test:a. Check valve piping to determine that it is

properly installed and supported.

b. Check boiler operating temperature and pressure.

c. Lift the try lever on the safety relief valve to thefull open position and hold it for at least fiveseconds or until clean water is discharged.

d. Release the try lever and allow the valve to close.If the valve leaks, operate the lever two or threetimes to clear the valve seat of foreign matter. Itmay take some time to determine if the valve hasshut completely.

e. If the valve continues to leak, it must be replacedbefore the boiler is returned to operation.

f. Check that operating pressure and temperaturehave returned to normal.

g. Check again to confirm that valve has closedcompletely and is not leaking.

3. Test low-water cut-off (if used) as described by themanufacturer.

4. Test limit as described in Section 7, “Check-OutProcedure.”

5. Test function of gas safety shut-off features asdescribed by gas valve and ignition controlmanufacturer.

MAINTENANCE

9. MAINTENANCE

27

E. ANNUALLY (BEFORE START OF HEATINGSEASON)

1. Inspect flueways, burners and vent system. SeeFigure 24.

a. Refer to the Operating Instructions in Figure 20to properly turn off the gas to the boiler. Turn offall electrical power to the boiler.

b. Remove jacket removable door, air inlet pipe, airbox cover, and air box diffuser screen.

d. Remove burner hitch pin clips. Disconnect pilottubing at compression elbow.

e. Disconnect pilot harness at gas valve. Gently pullpilot harness further inside air box to be able toremove burner with attached pilot.

f. Remove burners and pilot.

g. Brush gas outlet ports lightly using a soft bristlebrush. If extensive corrosion in outlet ports,replace.

h. Examine pilot hood and igniter for corrosion,scale, ceramic cracking. Replace if necessary.

i. Remove 3” diameter vent pipe from fan adapter.

j. Remove top jacket panel, flue collector/fanassembly, and flue baffles.

k. Examine flueways and flue collector/fan for scale,soot, and loose rust.

l. If necessary, brush flueways with wire brush andremove scale and loose rust from flue baffles. Ifcorroded, replace baffles.

m. Reinstall flue baffles.

n. Examine flue collector blanket seal.Reposition/replace as necessary to assure air tightseal between flue collector and heat exchanger.

o. Reinstall flue collector/fan assembly.

p. Reinstall jacket top panel.

q. Reinstall pilot, burners, hitch pin clips. Reconnectpilot harness to gas valve, gently pulling harnessto length required to reach gas valve.

r. Reinstall air box diffuser.

s. Examine air box cover seal. Reposition/replace asnecessary to assure air tight seal.

t. Reinstall air box cover.

u. Examine entire vent system for corrosion,support and joint integrity. Repair as necessary.Remove any debris inside vent.

v. Reconnect vent pipe to fan adapter. Reseal usinghigh-temp GE-106 silicone as shown in Section4, Venting, Ventilation and Air Inlet.

w. Refer to Operating Instructions in Figure 24 toproperly return the boiler to operation.

2. Check the pilot and main burner flame. See Figure23. The pilot should provide a steady flameenveloping 3/8″ to 1/2″ of the flame sensor. Ifrequired, adjust the pilot as stated in the gas valvemanufacturer’s instructions. The main burner flameinner cone should be approximately 1-1/2″ high andshould have a very sharp, blue color characteristic.

MAINTENANCE

Figure 23: Intermittent Pilot and MainBurner Flame

When servicing or replacing components, beabsolutely certain that the following conditions aremet:

●● Water, gas and electricity are off.●● The boiler is at room temperature.●● There is no pressure in the boiler.

DANGER

28

Leaks in the vent system will cause products ofcombustion to enter structure (vent system operatesunder positive pressure).

WARNING

Soot accumulation indicates boiler malfunction.Cause of malfunction must be determined andcorrected before returning boiler to service.

WARNING

29

MAINTENANCE

Figure 24: Inspection of Flueways, Burners, and Vent System.

BOILER DIMENSIONS & RATINGS

10. BOILER DIMENSIONS & RATINGS

Figure 25: Boiler Views

Table 8: Series PSC Boiler Dimensions

SERIES PSC BOILER DIMENSIONS

BoilerModel

Number


12¹⁄₂″15⁷⁄₈″19¹⁄₄″22⁵⁄₈″

30

Table 9: Series PSC Boiler Ratings

1 Net I=B=R water ratings based on an allowance of 1.15.2 Consult factory before selecting a boiler for installations having unusual piping and pickup

requirements, such as intermittent system operation, extensive piping systems, etc.3 Heating Capacity and Annual Fuel Utilization Efficiency (AFUE) ratings are based on U.S.

Government test.

CSAInput

“MBH”

BoilerModel

Number


70105140175

5888

117146

5077

102127

83.083.083.083.0

4.726.007.288.56

Seasonal Efficiency(AFUE)%3

WaterContent(Gal.)

DOEHeatingCapacityMBH3

Net I=B=RRatingsWater

MBH1,2

SERIES PSC BOILER RATINGS

Jacket Width “A”

31

This Page IntentionallyLeft Blank

32

REPAIR PARTS

REPAIR PARTSSERIES PSC GAS BOILER

Repair parts are available from your installer or by contacting Peerless Heater Company,Boyertown, PA 19512-1021. Use the figures and tables on pages 33-35 to assist inordering parts.

Note: Remember to include boiler model number and serial number when ordering parts.

11. REPAIR PARTS

Figure 26

33

REPAIR PARTSTable 10

Base Assembly

Floor Pan

Base Rear Panel Assembly

Base Observation Port Cover

Base/Air box Spacer

Air Box Right Side

Air Box Left Side

Air Box Top/Front Cover

Air Box Diffuser Screen

Rope Gasket Seal, Air Box

Flame Rollout Switch, Thermodisc G4AM00167C

Flame Rollout Switch Bracket

Burner Less Pilot Bracket

Burner with Pilot Bracket

Orifice, #48, normal altitude Natural Gas only

Orifice, #56, normal altitude LP Gas only

Gas Manifold

ItemNo. Description

91518

50100

6205

51771

(2) 50152

PSC2023

PSC2024

50143

PSC2025

(56”) 50718

51587

50119

(3) 51537

51539

(4) 50894

(4) 50899

50121

91909

50103

6208

51771

(2) 50152

PSC2023

PSC2024

50146

PSC2025-3

(76”) 50718

51587

50119

(9) 51537

51539

(10) 50894

(10) 50899

50124

91897

50102

6207

51771

(2) 50152

PSC2023

PSC2024

50145

PSC2025-2

(69”) 50718

51587

50119

(7) 51537

51539

(8) 50894

(8) 50899

50123

91883

50101

6206

51771

(2) 50152

PSC2023

PSC2024

50144

PSC2025-1

(63”) 50718

51587

50119

(5) 51537

51539

(6) 50894

(6) 50899

50122

(Quantity/Length) Stock Code

PSC-03 PSC-04 PSC-05 PSC-06

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

34

REPAIR PARTS

Figure 27

35

Table 11

16

17

18

19

20

21

22

23

24

25

Insulation Blanket, 1/2” x 1.50”, block to base

Block

Flue Baffle

Insulation Blanket, 1/2” x .75”, flue collector to block

Flue Collector

Gasket, Orifice Plate

Orifice Plate, normal altitude Natural Gas models only

Orifice Plate, normal altitude LP Gas models only

Fan

Fan Adapter

Jacket Set

Gas Valve, SV9501M2700, Natural Gas models only

Gas Valve, SV9501M2064, LP Gas models only

Pilot, Q3480B1017, Natural Gas models only

Pilot, Q3480B1058, LP Gas models only

Limit Control, L4080B1253 (less well)

Pressure Switch, Standard altitude, FS6124A2481

Transformer Relay Center, R8285D1026

Relay (mounted on jacket), R4222D1005

Safety Relief Valve, 30psi, Conbraco 10-408-05

Safety Relief Valve, 50psi, Watts #350

Temperature-Pressure Gauge

Circulator, Taco 007

Flange Set, Taco 110-Z53BP, 1 1/4”

Heat-Fab Vent Adapter 7301 AMTK

Z-Flex Locking Band SVSLBX03

ProTech Vent Adapter FSA-PSC/DE-3

Flex-L Star-34 Vent Adapter SRAPPA3

Wall Thimble Assembly, up to 11 1/2” walls

Wall Thimble Assembly, up to 20” walls

Heat-Fab vent pipe, elbows

Z-Flex, ProTech, Flex-L vent pipe, elbows

ItemNo. Description

(47”) 50867

91279

(2) 51584

(34”)50866

50131

(2) 50135

PSC5002

PSC5003

50775

50200

90366

51682

51691

50206

50205

50210

50170

50567

50223

50501

99950

51774

50736

51042

50199 (Also Available From Heat-Fab Distributor)

Available from Z-Flex Distributor

Available from ProTech Distributor

Available from Flex-L Distributor

90249

90350

Specify item including pipe length. Also available from Heat-Fab Distr.

Available from Vent Manufacturer Distributors

(61”) 50867

91281

(2) 51584

(47”)50866

50133

(2) 50135

PSC5002-2

PSC5003-2

50775

50200

90368

(54”) 50867

91280

(2) 51584

(41”)50866

50132

(2) 50135

PSC5002-1

PSC5003-1

50775

50200

90367

(Quantity/Length) Stock Code

PSC-03 PSC-04 PSC-05 PSC-06

(67”) 50867

91282

(2) 51584

(54”)50866

50134

(2) 50135

PSC5002-3

PSC5003-3

50775

50200

90369

REPAIR PARTS

PSCBoilers

SeriesGas

Installation,Operation &MaintenanceManualTO THE INSTALLER:

This manual is the property of the owner and mustbe affixed near the boiler for future reference.

TO THE OWNER:This boiler should be inspected annually by aQualified Service Agency.

PSC8030 R1 (11/00-1.5M)Printed in U.S.A.

PEERLESS HEATER COMPANY231 NORTH WALNUT STREET • BOYERTOWN, PA 19512-1021 • PHONE 610-367-2153

www.peerless-heater.com

HEATING PRODUCTS SINCE 1908

©2000 Peerless Heater Company

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