Raypak 302A-902A manual Start-Up, Blower Adjustment, Main Burner Adjustment

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Preparation

WARNING: Do not turn on gas at this time.

Check Power Supply

With multi-meter at incoming power, check voltage between:

Hot - Common (≈120 VAC)

Hot - Ground (≈120 VAC)

Common - Ground (< 1 VAC)

WARNING: If Common - Ground is > 1 VAC,

STOP: Contact electrician to correct ground failure. Failure to do this may burn out 120V-24V trans- former, or may cause other safety control damage or failure.

Attach Manometers to Measure Pressures

1.Turn off main gas valve.

2.Attach 24” scale manometer to the first main gas shut-off valve pressure tapping.

3.Attach (1) 12” scale manometer to the outlet side of the second main gas shut-off valve pressure tapping.

4.Attach (1) 12” scale manometer near the fan-prov- ing switch. Pull black cap from air pressure switch tee and connect the manometer. NOTE: Retain caps for reinstallation later.

Check Gas Supply Pressure

1.Slowly turn on main gas shut-off valve.

2.Read the gas supply pressure from the manome- ter; minimum supply pressure for natural gas is 5.0 in. WC, recommended supply is 7.0 in. WC, mini- mum supply pressure for propane gas is 11.0 in. WC (dynamic readings, all stages firing).

3.If the pressure is > 14.0 in. WC, turn off the valve.

4.Check if the service regulator is installed and/or adjust the service regulator.

Start-Up

Blower Adjustment

1.Turn off power.

2.Unplug cap at pressure switches and connect ma- nometer(s) to the tee.

3.Close all manual firing valves.

4.Turn power on.

5.Check manometers attached to fan pressure switch. The reading should be 1.4 ± .1 in. WC for propane gas and natural gas. If not, adjust the air shutter on the blowers to attain the correct value.

6.Turn power off.

7.Reconnect this cap.

Main Burner Adjustment

1.Turn off unit.

2.Open manual firing valves.

3.Turn on the unit, wait 15 seconds, and the igniter should glow. Look into sight glass located at each end of the heater to check igniter operation. Gas valves should open in 45-60 seconds.

4.If burner does not light on first trial. It will retry, up to three times.

5.Main burner ignition: Check manifold gas pressure at gas valve outlet pressure tap. This should read 3.5 ± 0.1 in. WC for natural gas and 10.5 ± 0.1 in. WC for propane gas.

6.If the pressure reading differs by more than ± 0.1 in. WC, remove screw cover from the gas pres- sure regulator and adjust main burner manifold pressure. Replace the screw cover. Repeat steps 2 to 5 on other valves as necessary.

CAUTION: Special manifold and air settings may be required. Verify rating plate and blower housing.

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Contents Installation and Operating Instructions Page Contents Pay Attention to These Terms Model Identification Before InstallationProduct Receipt Ratings and CertificationsComponent Locations Component Locations BackModel # Burners per Stages Fire at Valve General InformationModel # Burners Valve Firing Per Valve Staging Time/Temperature Relationships in Scalds General SafetyWater Time to Produce Serious Temp Burn Equipment Base InstallationInstallation Codes StackingOutdoor Installations Indoor InstallationsClearances Installations1 Canadian Installations2 Reversing Air Filter Combustion and Ventilation AirIndoor Units Direct VentTruSeal Combustion Air InstallationsConventional Combustion Air Supply All Air from Inside the BuildingGeneral Canadian InstallationsWater Piping Reversing Water ConnectionsRelief Valve Piping Hydrostatic Test Cold Water OperationPump Selection Temperature & Pressure GaugeHydronic Heating Min. Flow Max Flow GpmAir-Separation/Expansion Tank Pressure Drop in Feet of Head Feedwater RegulatorPiping Three-Way ValvesPotable Water and Space Heating Pool HeatingAutomatic Chlorinators and Chemical Feeders Winterizing Your HeaterPH of Water Gas SupplyPool/Spa Water Chemistry Water Hardness Total Dissolved SolidsReversing Gas Supply Connection Gas Supply ConnectionTable J Maximum Equivalent Pipe Length Gas Supply Pressure Electrical Power ConnectionsCheck the Power Source Field-Connected ControllersField Wiring Connection Making the Electrical ConnectionsWiring Connections Venting Appliance CategoriesDirect Venting Horizontal Through Support of Vent StackVent Terminal Location Stainless SteelCanadian Installations InstallationsChanging the Flue Outlet Installation Venting Installation TipsVenting Configurations Natural Draft Vertical Venting CategoryModel Venting Vent Size Height Intake Pipe Max. Length TerminationCommon Venting System Min MaxHorizontal Through-the-Wall Venting Category Horizontal Through-the-Wall Venting CategoryMax. Length Venting Vent Size Equivalent Intake Pipe Direct Vent Horizontal Through- the-WallMaterial Direct Vent Vertical Controls Outdoor InstallationFreeze Protection Heater Sequence of Operation Models 302A, 402A, 502A, 652A, 752A and 902AExternal Lights Color Indication Auto Reset High Limit Red Auto reset optionInternal Lights Color Indication Ignition Module Code ConditionHigh and Low Gas Pressure Switches High Limit Manual ResetFlow Switch Operating ControlHigh/Low Gas Pressure Switch Model 10F 20F 30F Min. Flow Max Flow Gpm 87%-Efficiency Boilers Special Instructions Water PipingVenting Appliance Categories Direct Venting Horizontal Through AL29-4CVent Terminal Location Vertical Venting CategoryCondensate Management 100’ Ducted Certified Maximum Combustion Air Air Inlet Model VentingMaterial Vent Length 40’ 752AE Combustion Air 902AE 30’ 80’Direct Vent Horizontal Through- the-Wall 302A 100’ 402A Galvanized Steel 502A 75’ Category 25’ Direct Vent VerticalCertified Vertical Venting Combustion Air Air Inlet 100’ 40’ 752A 902AWiring Diagram START-UP Pre Start-upMain Burner Adjustment Blower AdjustmentStart-Up Follow-Up Safety InspectionLeak Test Procedure Dual-Seat Gas Valves Pilot Turn-Down TestPost Start-Up Check Leak TestLighting Instructions OperationTo Turn Off Gas To Appliance Troubleshooting StepSuggested Minimum Maintenance Schedule MaintenancePreventive Maintenance Schedule Annually WeeklySemi-Annually As RequiredAppendix Inside Air ContaminationLimited Parts Warranty HI Delta Types H and WH Limited Parts Warranty HI Delta Type P

302A-902A specifications

The Raypak 302A-902A is a highly regarded pool and spa heater, known for its efficiency and reliability in delivering warmth to residential and commercial aquatic applications. This heater stands out due to its robust design, advanced technology, and user-friendly features.

One of the key characteristics of the Raypak 302A-902A is its dual fuel capability, which means it can run on either natural gas or propane. This flexibility allows users to choose their preferred fuel type, contributing to operational efficiency and cost-effectiveness. With a BTU output ranging from 302,000 to 902,000, the Raypak heater is capable of quickly heating large volumes of water, making it ideal for pools, spas, and hot tubs.

The heater incorporates advanced technology such as a stainless steel heat exchanger, which not only ensures excellent thermal conductivity but also promotes durability against corrosion. This is especially advantageous in harsh environments, where exposure to chemicals can significantly impact the lifespan of traditional copper heat exchangers. The Raypak 302A-902A's heat exchanger is designed to withstand the rigors of constant use while maintaining high performance levels.

Another prominent feature of the Raypak 302A-902A is its digital display control system, which simplifies the operation and monitoring of the heater. Users can easily set and adjust temperatures, as well as access diagnostic information, all through an intuitive interface. This digital control not only enhances user experience but also aids in the timely maintenance of the unit.

Energy efficiency is another major selling point of the Raypak 302A-902A. The heater is designed with environmentally friendly practices in mind, utilizing a low NOx burner that minimizes harmful emissions. This not only meets environmental regulations but also makes it a greener alternative for heating needs.

In terms of installation, the compact design of the Raypak 302A-902A allows for versatile placement options, whether in a residential backyard or a commercial environment. Its user-friendly installation process ensures that homeowners and businesses alike can enjoy the benefits of heated water with minimal hassle.

Overall, the Raypak 302A-902A is an exemplary choice for anyone seeking a high-quality, efficient, and flexible pool and spa heating solution. Its combination of robust engineering, advanced technology, and user-focused features solidifies its position as a leader in the market, promising effective heating for years to come. Whether for personal enjoyment or commercial use, this heater delivers exceptional performance that meets diverse heating needs.
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