Crown Boiler CWI138, CWI172, CWI345, CWI310 Wiring Diagram, Standing Pilot With Tankless Heater

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FIGURE 20: WIRING DIAGRAM, STANDING PILOT WITH TANKLESS HEATER

(NOTE 2)

2

HONEYWELL VR8204/VR8304

SERIES GAS VALVES (CWI069 - 345)

	+	ROBERTSHAW
TH	+	7000DERHC
TH		GAS VALVE

TR

(CWI379)

2. VENT DAMPER REQUIRED ON ALL BOILERS EXCEPT CWI310 - CWI379. WHEN DAMPER IS NOT US DAMPER HARNESS IS REPLACED WITH JUMPER PLUG.

FIGURE19: WIRINGDIAGRAM,INTERMITTENTIGNITION (EI)SYSTEMLESSTANKLESSHEATER

(NOTE 2)

HONEYWELL

L8124E

HIGH LIMIT

2

	LOW	LESS VENT	N	L
	LIMIT
			V8295A
	V8295A	DAMPER
			GAS VALVE
	(CW I310 -379 ONLY)		(CWI310-379 ONLY)

L

N

2.VENT DAMPER REQUIRED ON ALL BOILERS EXCEPT CWI310 - CWI379. WHEN DAMPER IS NOT USED, DAMPER HARNESS IS OMITTED AND TERMINAL B1 IS WIRED DIRECTLY TO FRS. AS SHOWN IN LADDER DIAGRAM

FIGURE 20: WIRING DIAGRAM, STANDING PILOT WITH TANKLESS HEATER

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20

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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 ContentsII Specifications FIGURE 1 CWI BOILERS - GENERALCONFIGURATIONTABLE 1 CWI SPECIFICATIONS IV Locating the Boiler III Before InstallingV Air for Combustion and Ventilation For Buildings of Other than Unusually Tight Construction ForBuildingsofUnusuallyTightConstructionExample FIGURE3BOILERINSTALLEDINCONFINEDSPACE, ALL AIR FROM INSIDE FIGURE 4 ALL AIR FROM OUTDOORS, VENTILATED CRAWL SPACE AND ATTICFIGURE 5 ALL AIR FROM OUTDOORS VIA VENTILATED 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 VIII System Piping StandardPipingDANGER Piping for Special Situations 1413BOILERSIDEPIPING FIGURE 11 STANDARD BOILER PIPING FIGURE 12 INDIRECT WATER HEATERFIGURE13 BOILERBYPASSPIPING FIGURE15 BOILERPIPINGWITHCHILLER FIGURE14 ISOLATIONOFBOILERFROMSYSTEMWITHAHEATEXCHANGERIX TANKLESS HEATER PIPING A mixing valve does not eliminate the risk of scalding Feel water before showering or bathingFIGURE 17TANKLESSHEATERPIPING 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 18CWI Control System - Sequence of Operation Sequence of Operation, Standing Pilot, Less Tankless HeaterSequence of Operation, Standing Pilot, With 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 HONEYWELLFOR YOUR SAFETY READ BEFORE LIGHTING LIGHTING INSTRUCTIONS FOR BOILERS EQUIPPED WITH ROBERTSHAW7000ERHC SERIES GAS VALVES STANDING PILOT 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 ? STARTC1&C2? T&TV?C2 and Caution Read page 36 before attempting to use this chart Standing Pilot Ignition System Troubleshooting ChartIntermittent Ignition System Troubleshooting Chart XIV PARTS Page These Valves Piped in Series to Provide Redundent Shut-off 1/4 Pilot Tubing Used with Robertshaw Valves40mm BURNERS ONLY 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 P.O. Box 3633 I. StreetPhiladelphia