Crown Boiler CWI241, CWI172, CWI345, CWI310, CWI103, CWI276, CWI Series, CWI069, CWI379, CWI207, CWI138

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16)Test thermostat operation while the boiler is running. Turn the thermostat to the lowest setting. For standing pilot boiler models, pilot burner should remain lit but the main burners should stop firing. For intermittent ignition boiler models both pilot burner and main burners should stop firing. Raise the thermostat back to the highest setting. The main burners (for standing pilot boiler models) or pilot burner and main burners (for intermittent ignition boiler models) should relight.

17)Verify high limit operation. Allow the boiler water temperature to increase to hi limit setting. The burners should shut down and the circulator continue running. For standing pilot boiler models, pilot burner should remain lit but the main burners should stop firing. For intermittent ignition boiler models, both the pilot burner and main burners should stop firing.

18)Allow the boiler water temperature to drop below high limit setting.

19)The main burners (for standing pilot boiler models) or pilot burner and main burners (for intermittent ignition boiler models) should relight.

20)After the boiler has operated for approximately 30 minutes, check the boiler and heating system piping for leaks. Repair any leaks found at once.

21)Inspect the vent system for flue gas leaks. Repair any leaks found before leaving the boiler in operation.

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Contents CWI Series Gas-Fired Natural Draft Water Boilers INSTALLATION INSTRUCTIONSModels These instructions must be affixed on or adjacent to the boilerI Product Description Table of ContentsTABLE 1 CWI SPECIFICATIONS II SpecificationsFIGURE 1 CWI BOILERS - GENERALCONFIGURATION IV Locating the Boiler III Before InstallingV 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 FIGURE 9 VENT DAMPER INSTALLATION DETAILS FIGURE8 CWI BOILERTYPICALVENTSYSTEM INSTALLATION AND COMPONENTSVII Gas Piping DANGER VIII System PipingStandardPiping Piping for Special Situations 1413BOILERSIDEPIPING FIGURE 11 STANDARD BOILER PIPING FIGURE 12 INDIRECT WATER HEATERFIGURE13 BOILERBYPASSPIPING FIGURE15 BOILERPIPINGWITHCHILLER FIGURE14 ISOLATIONOFBOILERFROMSYSTEMWITHAHEATEXCHANGERIX TANKLESS HEATER PIPING FIGURE 17TANKLESSHEATERPIPING A mixing valve does not eliminate the risk of scaldingFeel water before showering or bathing SingleZoneWiring IX WiringFIGURE 20 WIRING DIAGRAM, STANDING PILOT WITH TANKLESS HEATER Wiring Variations FACTORY BOILER WIRING NOT SHOWN - SEE FIGURES 18 FIGURE 22 CIRCULATOR ZONEWIRING USING HONEYWELLR845AsFIGURE23ZONEWIRINGUSINGHONEYWELLV8043FZONEVALVES 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, With Tankless Heater Sequence of Operation, Intermittent Ignition, Less Tankless HeaterSafety Control Operation - Standing Pilot and Intermittent Ignition XI Start-up and CheckoutFIGURE 24 STANDING PILOT BURNER FLAME 2726Page Page LIGHTING INSTRUCTIONS FOR YOUR SAFETY READ BEFORE OPERATINGTO TURN OFF GAS TO APPLIANCE LIGHTING INSTRUCTIONS FOR BOILERS EQUIPPED WITH HONEYWELL7000ERHC SERIES GAS VALVES STANDING PILOT FOR YOUR SAFETY READ BEFORE LIGHTINGLIGHTING INSTRUCTIONS FOR BOILERS EQUIPPED WITH ROBERTSHAW OPERATING INSTRUCTIONS FOR YOUR SAFETY READ BEFORE LIGHTINGTO TURN OFF GAS TO APPLIANCE VR8204 AND VR8304 SERIES GAS VALVES INTERMITTENT PILOT7000DERHC SERIES GAS VALVES INTERMITTENT PILOT FIGURE 28b GASVALVEDETAIL-ROBERTSHAW 7000DERHC INTERMITTENT IGNITION FIGURE 27a GASVALVEDETAIL-HONEYWELLVR8200ORVR8300STANDINGPILOTXI Service and Maintenance Heat Exchanger Cleaning Procedure XIII Troubleshooting C1&C2? STARTNational Fuel Gas Code 5&6 onL2 ? STARTC2 and C1&C2?T&TV? Caution Read page 36 before attempting to use this chart Standing Pilot Ignition System Troubleshooting 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 A. Before Installing Appendix A Knockdown Boiler Assembly InstructionsB. BaseAssembly Preparation C. Heat Exchanger and Flue Collector InstallationFIGUREA1 BASE, HEAT EXCHANGER, FLUE COLLECTORASSEMBLY E. Control and Trim Installation D. Gas Valve InstallationFIGURE A2 JACKET INSTALLATION G. Complete Installation F. Electrical Wiring ConnectionsFIGURE A3 TAPPING LOCATIONS SEE TEXT FOR TAPPING USES Philadelphia P.O. Box3633 I. Street