Raypak 302-902 manual Natural Draft Vertical Venting System Installation

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•Natural Draft Vertical Venting System Installation

Natural draft venting uses the natural buoyancy of the heated flue products to create a thermal driving head that expels the exhaust gases from the flue. The negative draft must be within the range of -.01” to -.10” negative W.C. as measured 12 inches from the appliance flue outlet to insure proper operation. Vent material must be listed by a nationally recognized test agency.

The maximum and minimum venting length for Category I appliance shall be determined per the latest edition of the National Fuel Gas Code (U.S.) or B149.1 and .2 Installation Code (Canada).

The diameter of vent flue pipe should be sized according to Part 11 of the latest edition of the National Fuel Gas Code (U.S.) and part 7 and appendix B of the CAN/CGA-B149.1 and .2 installation code (Canada). The minimum flue pipe diameter for conventional negative draft venting using double-wall B type vent is 5” for 302, 6” for 402 & 502 and 8" 652, 752 & 902.

NOTICE:

Vent Adapter will have to be used to connect B vent to the unit.

The connection from the appliance vent to the stack must be as direct as possible and shall be the same diameter as, or larger than the vent outlet. The horizontal breaching of a vent must have an upward slope of not less than 1/4 inch per linear foot from the boiler to the vent terminal. The horizontal portions of the vent shall also be supported for the design and weight of the material employed to maintain clearances and to prevent physical damage or separation of joints.

•Natural Draft Vertical Vent Termination

The vent terminal should be vertical and should terminate outside the building at least two (2) feet above the highest point of the roof that is within 10 feet. The vent cap should have a minimum clearance of four (4) feet horizontally from and in no case above or below (unless a four (4) foot horizontal distance is maintained) electric meters, gas meters, regulators and relief equipment. The distance of the vent terminal from adjacent public walkways, adjacent buildings, open windows and building openings must be consistent with the National Fuel Gas Code, or in Canada, the latest edition of CAN/CGA-B149 Installation Code for Gas Burning Appliances and Equipment. Gas vents supported only by flashing and extended above the roof more than five feet should be securely guyed or braced to withstand snow and wind loads.

CAUTION:

Listed vent cap terminal must be used and sized adequately to evacuate the flue products from the boilers.

•Natural Draft Vertical Venting With Common Venting System, Category I Appliance Only

Manifolds that connect more than one boiler to a common chimney must be sized to handle the combined load. Consult available guides for proper sizing of the manifold and the chimney. At no time should the area of the vent be less than the area of the largest boiler exhaust outlet.

WARNING:

CAUTION:

Vent connectors serving appliances vented by natural draft shall not be connected into any portion of mechanical draft systems operating under a positive pressure.

Vent connectors for natural draft venting systems must be type “B” vent or better.

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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 Temperature & Pressure Gauge LOW Temperature SystemSection D Water Piping General Reliefvalve PipingSection 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 Check the Power Source Section I Electrical Power ConnectionsCheck Power Source FIELD-CONNECTEDCONTROLLERSMaking 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 Flow Switch High Limit Manual ResetIgnition Control Module Operating ControlLOW 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 Tools Needed Section N HI-DELTA Initial START-UPPreparation for START-UP Turn Off Main Gas ValveYour 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 MaintenanceWeekly Preventive Maintenance ScheduleSemi-Annually AnnuallyInsidecombustionaircontamination Appendix aCorporate Headquarters

302-902 specifications

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