Crown Boiler CWI Series, CWI172, CWI345, CWI310, CWI103, CWI276 V Air for Combustion and Ventilation

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V Air for Combustion and Ventilation

“X” (RH CLEARANCE)

ALL SIZES LESS TANKLESS HEATER - 18“ CWI103 - CWI241 WITH TANKLESS HTR. - 18“ CWI276 - CWI379 WITH TANKLESS HTR. - 21“

CWI207 - CWI379 WITH HIGH CAPY. TANKLESS HTR. - 24“

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FIGURE2:CWI BOILERS-CLEARANCESTOALL

TYPESOFCOMBUSTIBLECONSTRUCTIONAND

NONCOMBUSTIBLECEILINGS,WALLS,ANDDOORS.

If the right side 24” service clearance is reduced, adequate clearance must be maintained to easily read and access the controls. Alternatively, access may be provided using a door. The right side clearances shown for boilers equipped with tankless heaters allow for removal of the tankless heater.

2)This boiler may be installed directly over a non-carpeted combustible floor.

3)The boiler must be installed on a hard level surface.

4)Do not install this boiler in a location where gasoline or other flammable vapors or liquids will be stored or used. Do not install this boiler in an area where large amounts of airborne dust will be present, such as a workshop.

5)The boiler should be located as close to the chimney as possible.

6)Do not install this boiler directly on a surface that may get wet. Raise the boiler on a pad.

V Air for Combustion and Ventilation

Sufficient fresh air must be supplied for combustion, ventilation and flue gas dilution. Provisions for combustion, ventilation and flue gas dilution air for gas utilization equipment vented by natural draft must be made in accordance with local building codes or, in absence of such codes, in accordance with sections 5.3.3 and 5.3.4 (“Air for Combustion and Ventilation”) of the National Fuel Gas Code, NFPA 54/ANSI Z223.1.

To ensure an adequate supply of combustion, ventilation and flue gas dilution air supply, start by determining whether the boiler is to be installed in a building of unusually tight construction. A good definition of a building of unusually tight construction is one which has all of the following features:

Walls and ceilings exposed to outside atmosphere have a continuous water vapor retarder with a rating of 1 perm or less with openings gasketed and sealed

Weather stripping has been added on openable windows and doors

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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