Crown Boiler CWI Series, CWI172, CWI345, CWI310, CWI103, CWI276, CWI069, CWI241, CWI379 Start, C1&C2?

Page 38
START

Troubleshooting Chart for CWI Boilers Without Tankless Heaters Caution: Read page 36 before attempting to use this chart

START

Thermostat calls for heat

*Pow er off

*Blow n fuse or tripped breaker

*Misw ired or loose electrical

Circulator start?

N

N120 volts at L1&L2?

Y

 

N

 

 

 

Y

Boiler

Y

Vent

Y

Equipped

 

 

damper

 

 

With

 

 

 

 

open?

 

 

Damper?

 

 

 

 

N

 

 

 

 

 

24 volts

across B and R Y (limit sw itch) in

L8148E ?

connection in 120V line

Remove t'stat or zone valve end sw itch w ires from T&TV terminals on L8148E. Install temporary jumper across terminals T and TV.

120 volts at

C1&C2?

N

Y24 volts C1&C2? across T&TV?

N

120volts

Y across terminals at circulator?

Y

*Seized or defective circulator

 

 

 

*Boiler off on

N

 

N

limit

 

 

 

*Defective

 

 

 

 

 

 

high limit.

 

 

 

 

24volts

betw een pins

1&4 (blue&yellow )and

2&4 (orange&yellow ) on

damper end of damper N harness? See

Note 7 on page 28.

Does

N

*Defective

circulator

 

 

 

L8148E-see

 

 

 

run now ?

 

 

 

 

 

 

Note 6 on page

 

 

 

 

 

36.

 

Y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*Loose connection in t'stat or zone valve end sw itch w iring

*Defective t'stat or zone valve end sw itch

*T'stat or zone system misw ired-consult t'stat or zone valve manufacturer's instructions

*Bad electrical connection betw een C1 or C2 and circulator

Y

*Obstruction in path of damper blade

*Defective damper motor

*Loose connection betw een damper harness and damper

*Loose connection betw een damper harness and L8148E

*Defective damper harness.

*Defective L8148E

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37

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Contents Models Gas-Fired Natural Draft Water Boilers INSTALLATION INSTRUCTIONSCWI Series These instructions must be affixed on or adjacent to the boilerTable of Contents I Product DescriptionTABLE 1 CWI SPECIFICATIONS II SpecificationsFIGURE 1 CWI BOILERS - GENERALCONFIGURATION III Before Installing IV Locating the BoilerV Air for Combustion and Ventilation Example For Buildings of Other than Unusually Tight ConstructionForBuildingsofUnusuallyTightConstruction FIGURE 5 ALL AIR FROM OUTDOORS VIA VENTILATED ATTIC FIGURE3BOILERINSTALLEDINCONFINEDSPACE, ALL AIR FROM INSIDEFIGURE 4 ALL AIR FROM OUTDOORS, VENTILATED CRAWL SPACE AND ATTIC FIGURE 6 ALL AIR FROM OUTDOORS, USING OPENINGS INTO BOILER ROOM VI Venting Removing an Existing Boiler from a Common Chimney FIGURE8 CWI BOILERTYPICALVENTSYSTEM INSTALLATION AND COMPONENTS FIGURE 9 VENT DAMPER INSTALLATION DETAILSVII Gas Piping DANGER VIII System PipingStandardPiping 1413 Piping for Special SituationsFIGURE 11 STANDARD BOILER PIPING FIGURE 12 INDIRECT WATER HEATER BOILERSIDEPIPINGFIGURE13 BOILERBYPASSPIPING FIGURE14 ISOLATIONOFBOILERFROMSYSTEMWITHAHEATEXCHANGER FIGURE15 BOILERPIPINGWITHCHILLERIX TANKLESS HEATER PIPING FIGURE 17TANKLESSHEATERPIPING A mixing valve does not eliminate the risk of scaldingFeel water before showering or bathing IX Wiring SingleZoneWiringFIGURE 20 WIRING DIAGRAM, STANDING PILOT WITH TANKLESS HEATER Wiring Variations FIGURE23ZONEWIRINGUSINGHONEYWELLV8043FZONEVALVES FIGURE 22 CIRCULATOR ZONEWIRING USING HONEYWELLR845AsFACTORY BOILER WIRING NOT SHOWN - SEE FIGURES 18 FACTORYWIRING NOT SHOWN - SEE FIGURES 18Sequence of Operation, Standing Pilot, With Tankless Heater CWI Control System - Sequence of OperationSequence of Operation, Standing Pilot, Less Tankless Heater Sequence of Operation, Intermittent Ignition, Less Tankless Heater Sequence of Operation, Intermittent Ignition, With Tankless HeaterXI Start-up and Checkout Safety Control Operation - Standing Pilot and Intermittent Ignition2726 FIGURE 24 STANDING PILOT BURNER FLAMEPage Page TO TURN OFF GAS TO APPLIANCE FOR YOUR SAFETY READ BEFORE OPERATINGLIGHTING INSTRUCTIONS LIGHTING INSTRUCTIONS FOR BOILERS EQUIPPED WITH HONEYWELL7000ERHC SERIES GAS VALVES STANDING PILOT FOR YOUR SAFETY READ BEFORE LIGHTINGLIGHTING INSTRUCTIONS FOR BOILERS EQUIPPED WITH ROBERTSHAW TO TURN OFF GAS TO APPLIANCE FOR YOUR SAFETY READ BEFORE LIGHTINGOPERATING INSTRUCTIONS VR8204 AND VR8304 SERIES GAS VALVES INTERMITTENT PILOT7000DERHC SERIES GAS VALVES INTERMITTENT PILOT FIGURE 27a GASVALVEDETAIL-HONEYWELLVR8200ORVR8300STANDINGPILOT FIGURE 28b GASVALVEDETAIL-ROBERTSHAW 7000DERHC INTERMITTENT IGNITIONXI Service and Maintenance Heat Exchanger Cleaning Procedure XIII Troubleshooting START C1&C2?5&6 on National Fuel Gas CodeSTART L2 ?C2 and C1&C2?T&TV? Standing Pilot Ignition System Troubleshooting Chart Caution Read page 36 before attempting to use this chartIntermittent Ignition System Troubleshooting Chart XIV PARTS Page 40mm BURNERS ONLY These Valves Piped in Series to Provide Redundent Shut-off1/4 Pilot Tubing Used with Robertshaw Valves Page KEY # Page B. BaseAssembly Preparation Appendix A Knockdown Boiler Assembly InstructionsA. Before Installing C. Heat Exchanger and Flue Collector InstallationFIGUREA1 BASE, HEAT EXCHANGER, FLUE COLLECTORASSEMBLY D. Gas Valve Installation E. Control and Trim InstallationFIGURE A2 JACKET INSTALLATION F. Electrical Wiring Connections G. Complete InstallationFIGURE A3 TAPPING LOCATIONS SEE TEXT FOR TAPPING USES Philadelphia P.O. Box3633 I. Street