Raypak 302-902 manual Horizontal Thru-wall Direct Vent Termination

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•Horizontal Thru-wall Direct Vent System (Category III) Installation

These installations utilize the boiler mounted blower to draw combustion air from outdoors and vent combustion products to the outdoors.

The total length of the thru-wall exhaust vent cannot exceed forty (40) feet in length for the flue outlet. Each elbow used is equal to ten (10) feet of straight pipe. This will allow installation in one of the three following combinations.

·40’ of straight combustion air pipe.

·30' of straight combustion air pipe and one elbow.

·20' of straight combustion air pipe and two elbows.

The total length air supply pipe cannot exceed forty (40) feet in length for the combustion air inlet. Each elbow used is equal to ten (10) feet of straight pipe. This will allow installation in one of the three following combinations.

·40’ of straight flue pipe

·30' of straight flue pipe and one elbow.

·20' of straight flue pipe and two elbows.

The flue exhaust direct vent cap is not considered in the overall length of the venting system.

Care must be taken during assembly that all joints are sealed properly and are airtight.

The vent must be installed to prevent the potential accumulation of condensate in the vent pipes. It is recommended that:

a)The vent be installed with a slight downward slope of not more than 1/4" per foot of horizontal run to the vent terminal.

b)The vent be insulated through the length of the horizontal run.

For appliances installed in extreme cold climate, it is recommended that:

a)The vent be installed with a slight upward slope of not more than 1/4" per foot of horizontal run to the vent terminal. In this case, an approved condensate trap must be installed per applicable codes.

b)The intake vent be insulated through the length of the horizontal run.

•Horizontal Thru-wall Direct Vent Termination

The flue exhaust direct vent cap MUST be mounted on the exterior of the building. The direct vent cap cannot be installed in a well or below grade. The direct vent cap must be installed at least one (1) foot above ground level and above normal snow levels.

Multiple direct vent caps MUST NOT be installed with one combustion air inlet directly above a direct vent cap. This vertical spacing would allow the flue products from the direct vent cap to be pulled into the combustion air intake installed above. This type of installation can cause non warrantable problems with components and poor operation of the unit due to the recirculation of flue products. Multiple direct vent caps should be installed in the same horizontal plane with a three (3) foot clearance from the side of one vent cap to the side of the adjacent vent cap(s).

Combustion air supplied from outdoors must be free of particulate and chemical contaminants. To avoid a blocked flue condition, keep the vent cap clear of snow, ice, leaves, debris, etc.

WARNING:

No substitutions of flue pipe or vent cap material are allowed. Such substitutions would jeopardize the safety and health of inhabitants.

TheStainlessSteelflueexhaustdirectventcapmustbefurnishedbytheboilermanufacturerinaccordancewithitslisting.

Use only the special gas vent pipes listed for use with category III gas burning heaters, such as the stainless steel Saf-T vent by Heat Fab Inc. (800-772-0739). Pipe joints must be positively sealed. Follow carefully the vent manufacturers installation instructions.

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Contents Installation Operating Instructions Table of Contents Page Section a Before Installing the Boiler Model Identification High Delta Component Location General Information Stacking Equipment BaseBoiler Side 302-902 Boiler SizeOutdoor Installation Minimum Clearances OutdoorinstallationsCombustion and Ventilation AIR Indoor Units Direct VENT-INSTALLATONSection C Combustion and Ventilation AIR Page Reliefvalve Piping LOW Temperature SystemTemperature & Pressure Gauge Section D Water Piping GeneralSection E Hydronic Heating Piping Fig. #9223 DUALBOILERPRIMARY/SECONDARYPIPINGSingle Domestic HOT Water Heater with ONE Storage Tank Section F Domestic HOT Water PipingPotable Water and Space Heatingapplication Bypass Section G Pool HeatingSpawater Chemistry Singlepoolheaterapplication Automatic Chlorinators and ChemicalfeedersWinterizingyour Heater GAS Supply Pressure Section H GAS Supply ConnectionsGAS Supply Connection GAS Pressure Regulator FIELD-CONNECTEDCONTROLLERS Section I Electrical Power ConnectionsCheck the Power Source Check Power SourceMaking the Electrical Connections Field Wiring ConnectionShockhazard Electrical Connections Domestic HOT WaterDefinition ofAppliance Categories Section J Venting ConnectionsTable J-1 Vent Terminal Location General Support of Vent StackVenting Configurations Venting Installation TipsNatural Draft Verticalvent Section J-1 Natural Draft Vertical Venting CategoryNatural Draft Vertical Vent Termination Natural Draft Vertical Venting System InstallationPage HORIZONTALTHRU-WALLVENTING Category III Table Section J-2Fig. #9436 HI Delta Sleeve Flue ConversionHorizontal Thru-wall Direct Vent Termination HORIZONTALTHRU-WALLVENTING Table Section J-3 Direct VentHorizontal Thru-wall Direct Vent Termination Verticalventing Table Direct VentVertical Direct Vent Termination Vertical Direct Vent System InstallationHideltaoutdoorventkitandinstructions Section J-5Heater as shipped HI Delta Outdoor Vent InstructionsFinished assembly HI Delta Filter BOX Instructions HI Delta Filter BOX KITThiskitincludes Model Partnumber Filter Section K Controls HI-DELTAModel Boiler Sequence of OperationsHI-DELTAModel HI-DELTAModel902 Operating Control High Limit Manual ResetFlow Switch Ignition Control ModuleLOW Water CUT OFF Optional LOW Water Cutoff High and LOW GAS Pressure SwitchesGAS Pressure Switch Wire Diagram Model Reference Drawing Number M152470-Rev. J H3/W3 Reference Drawing Number M152464-Rev R H3/HW3 Reference Drawing Number M152465 Rev-P H3/W3 TIME/TEMPERATURE Relationships in Scalds Section L General Safety PrecautionsSection M PRE-START-UP Turn Off Main Gas Valve Section N HI-DELTA Initial START-UPTools Needed Preparation for START-UPYour Hi-Delta is tuned START-UPPilot Turn Down Test for Raypak HI Delta Boilers Leak Test Procedure DUAL-SEAT GAS ValvesPage Section O Post START-UP Check Toturn Offgastoappliance Section P OperationSuggested Minimum Maintenance Schedule Section Q MaintenanceAnnually Preventive Maintenance ScheduleWeekly Semi-AnnuallyInsidecombustionaircontamination Appendix aCorporate Headquarters

302-902 specifications

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