Raypak 302A-902A manual High Limit Manual Reset, Flow Switch, Operating Control

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The optional single-try ignition module will lock out after failing to light one time. To reset it, press and release the small, recessed black push button located inside of the cut-out on the lower right-hand corner of the ignition module case. Turning off the power to the heater WILL NOT reset the ignition module.

General Safety Section for safety precautions con- cerning domestic hot water applications.

Fig. 30: High Limit (Manual Reset)

High Limit (Manual Reset)

The heater is equipped with a manual reset high limit temperature device. Push the reset button and adjust the setting to 40 - 50°F above desired operating tem- perature.

Fig. 31: Flow Switch

Flow Switch

This dual-purpose control, mounted and wired in series with the main gas valve, shuts off heater in case of pump failure or low water flow.

Operating Control

The heater may be equipped with different types of operating controls. Consult the individual control data sheets supplied with your heater paperwork. See the

Fig. 32: Operating Control

Low Water Cut-Off (Optional)

The low water cut-off automatically shuts down the burner whenever water level drops below the level of the sensing probe. A 5-second time delay prevents premature lockout due to temporary conditions such as power fluctuations or air pockets.

Fig. 33: Low Water Cut-Off

High and Low Gas Pressure Switches

The low gas pressure switch (standard) connection mounts upstream of the gas valve to ensure that suffi- cient gas pressure is present for proper regulator per- formance. The low gas pressure switch automatically shuts down the heater if gas supply drops below the factory setting of 5.0 in. WC for natural gas, and 10.0 in. WC for propane gas.

The high gas pressure switch (optional) connection mounts down-stream of the stage-1 gas valve. If the gas pressure regulator fails, the high gas pressure switch automatically shuts down the burner.

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Contents Installation and Operating Instructions Page Contents Pay Attention to These Terms Product Receipt Before InstallationModel Identification Ratings and CertificationsComponent Locations Back Component LocationsModel # 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 Installation Codes InstallationEquipment Base StackingOutdoor Installations Indoor InstallationsClearances Installations1 Canadian Installations2 Indoor Units Combustion and Ventilation AirReversing Air Filter Direct VentConventional Combustion Air Supply InstallationsTruSeal Combustion Air All Air from Inside the BuildingWater Piping Canadian InstallationsGeneral Reversing Water ConnectionsCold Water Operation Relief Valve Piping Hydrostatic TestHydronic Heating Temperature & Pressure GaugePump Selection Min. Flow Max Flow GpmPiping Pressure Drop in Feet of Head Feedwater RegulatorAir-Separation/Expansion Tank Three-Way ValvesPool Heating Potable Water and Space HeatingWinterizing Your Heater Automatic Chlorinators and Chemical FeedersPool/Spa Water Chemistry Water Hardness Gas SupplyPH of Water Total Dissolved SolidsReversing Gas Supply Connection Gas Supply ConnectionTable J Maximum Equivalent Pipe Length Check the Power Source Electrical Power ConnectionsGas Supply Pressure Field-Connected ControllersMaking the Electrical Connections Field Wiring ConnectionWiring Connections Appliance Categories VentingVent Terminal Location Support of Vent StackDirect Venting Horizontal Through Stainless SteelCanadian Installations InstallationsChanging the Flue Outlet Venting Configurations Venting Installation TipsInstallation Natural Draft Vertical Venting CategoryCommon Venting System TerminationModel Venting Vent Size Height Intake Pipe Max. Length 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 Models 302A, 402A, 502A, 652A, 752A and 902A Heater Sequence of OperationExternal Lights Color Indication Auto Reset High Limit Red Auto reset optionInternal Lights Color Indication Code Condition Ignition ModuleFlow Switch High Limit Manual ResetHigh and Low Gas Pressure Switches Operating ControlHigh/Low Gas Pressure Switch Venting Appliance Categories 87%-Efficiency Boilers Special Instructions Water PipingModel 10F 20F 30F Min. Flow Max Flow Gpm Direct Venting Horizontal Through AL29-4CVent Terminal Location Vertical Venting CategoryCondensate Management Material Vent Length Certified Maximum Combustion Air Air Inlet Model Venting100’ Ducted 40’ 752AE Combustion Air 902AE 30’ 80’Direct Vent Horizontal Through- the-Wall Certified Vertical Venting Combustion Air Air Inlet Direct Vent Vertical302A 100’ 402A Galvanized Steel 502A 75’ Category 25’ 100’ 40’ 752A 902AWiring Diagram Pre Start-up START-UPMain Burner Adjustment Blower AdjustmentStart-Up Leak Test Procedure Dual-Seat Gas Valves Safety InspectionFollow-Up Pilot Turn-Down TestLeak Test Post Start-Up CheckLighting Instructions OperationTo Turn Off Gas To Appliance Step TroubleshootingSuggested Minimum Maintenance Schedule MaintenancePreventive Maintenance Schedule Semi-Annually WeeklyAnnually As RequiredInside Air Contamination AppendixLimited 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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