Raypak Comprehensive Guide to Hi Delta Boiler Electrical Connections
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ELECTRICAL CONNECTIONS - DOMESTIC HOT WATER

CAUTION:

DANGER

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

-SHOCKHAZARD

Make sure electrical power to the heater is disconnected to avoid potential serious injury or damage to components.

Installer action is required to electrically enable your Hi-Delta boiler to operate after making the power conections. You must make a connection on Terminal Block #3 for temperature control connections. This will be done based on the controller option selected with your boiler order.

1.For Pool and Closed Loop Water Source Heat Pump applications, your boiler should be configured to operate in an ON/ OFF firing mode. This means that you will connect a single-pole control to stage one of TB-3 (Terminals 1&2). Then jumper the remaining firing stages. For example, if your boiler is a 652, you will jumper stage two. Then your boiler will either be on at full fire, or it will be off.

2.For multi-stage controller connections, connect each stage of the control to the corresponding stage of TB-3 in the boiler. Stage 1 of the boiler to stage 1 of the control. Stage 2 of the boiler to stage 2 of the control, and so on.

Set the operating control at the setpoint in which you want the boiler to maintain. Ensure that the sensing bulb of the control is at the point in the system that will best maintain the temperature you want. For example, when you are heating a tank of water, you want the operating control sensor bulb in the tank.

Consult the wiring diagram shipped with the boiler in the instruction packet. The "TH" leads are for the remote tank control through the boilers 24 volt transformer. DO NOT attach line voltage to the "TH" leads. Before starting boiler check to insure proper voltage to boiler and pump.

SINGLE

 

STAGE

2-STAGE

TANKSTAT

TANKSTAT

 

ig. #9138.1

Fig. #9138.2

 

BREAK THE WIRE NUTAT THE

BREAK THE WIRE NUTAT THE

BOILER "TH" CONNECTIONSAND

BOILER "TH" CONNECTIONSAND

ATTACH TO THE SINGLE TANKSTAT

ATTACH TO THE DUAL TANKSTAT

PER ILLUSTRATION

PER ILLUSTRATION

Boiler must be electrically grounded in accordance with National Electrical Code ANSI/NFPA No. 70, and CSA C22.1 C.E.C. Part 1 in Canada.

NOTES:

1.Field installed ground to inside of junction box.

2.If any of the original wire as supplied with the boiler must be replaced, it must be replaced with 105°C wire or its equivalent.

3.“TH” leads connect to terminal block 3 (See wiring diagram).

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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

The Raypak 302-902 is a highly efficient, reliable, and versatile heating solution commonly used in residential and commercial pool heating applications. Known for its exceptional performance and advanced technology, the Raypak 302-902 has become a favored choice among pool owners looking to extend their swimming season and enhance comfort.

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