Raypak 302B Field Wiring Connection, Check the Power Source, Making the Electrical Connections

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Check the Power Source

WARNING: Using a multi-meter, check the following voltages at the terminal block inside the unit. Make sure proper polarity is followed and house ground is proven. (See Fig. 18.)

BLACK CIRCUIT

BREAKER

WHITE

GREEN

GROUND

A B C

Fig. 18: Wiring Connections

Check the power source:

AC = 108 VAC Minimum, 132 VAC MAX AB = 108 VAC Minimum, 132 VAC MAX BC = <1 VAC Maximum

Fig. 19: Multi-meter

2.Turn off all power to the heater. Verify that power has been turned off by testing with a multi-meter prior to working with any electrical connections or components.

3.Observe proper wire colors while making electri- cal connections. Many electronic controls are polarity sensitive. Components damaged by improper electrical installation are not covered by warranty.

4.Provide overload protection and a disconnect means for equipment serviceability as required by local and state code.

5.Install heater controls, thermostats, or building management systems in accordance with the applicable manufacturers’ instructions.

6.Conduit should not be used as the earth ground.

Field Wiring Connection

NOTE: A grounding electrode conductor shall be used to connect the equipment grounding conductors, the equipment enclosures, and the grounded service conductor to the grounding electrode.

If the heater does not have a factory-wired stage con- troller, it is factory-wired in an on-off configuration with other stage terminals jumpered.

To field-connect a stage controller, remove factory- installed jumpers and wire stage controller as shown in Fig. 21.

Making the Electrical Connections

Refer to Fig. 18-23.

1.Verify that circuit breaker is properly sized by referring to heater rating plate. A dedicated circuit breaker should be provided.

Fig. 20: Wiring Location

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

CAUTION: For pumps larger than 3/4 HP, a separate circuit breaker may be required.

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Contents Installation & Operating Instructions Deletions None Contents Pay Attention to These Terms Model Identification Before InstallationInstallations at Elevation Product ReceiptComponent Locations Back Component LocationsGeneral Information Water Time to Produce Serious Temp Burn General SafetyTime/Temperature Relationships in Scalds Stacking InstallationInstallation Codes Equipment BaseClearances Indoor InstallationsOutdoor Installations Ft 91 cm within a Direct Vent Combustion and Ventilation AirIndoor Units Reversing Air FilterAll Air from Inside the Building InstallationsConventional Combustion Air Supply TruSeal Combustion AirReversing Water Connections Canadian InstallationsWater Piping GeneralCold Water Operation Relief Valve Piping Hydrostatic TestCold Water Starts Temperature & Pressure GaugeHydronic Heating Pump SelectionThree-Way Valves Pressure Drop in Feet of Head Feedwater RegulatorPiping Air-Separation/Expansion TankPool Heating Potable Water and Space HeatingWater Hardness Automatic Chlorinators and Chemical FeedersWinterizing Your Heater Pool/Spa Water ChemistryTotal Dissolved Solids PH of WaterTable K Maximum Equivalent Pipe Length Gas SupplyGas Supply Connection ModelField-Connected Controllers Electrical Power ConnectionsGas Supply Pressure Making the Electrical Connections Field Wiring ConnectionCheck the Power Source Stage Tankstat Appliance Categories VentingFlue Exhaust Tee Model Diameter Order NumberVent Terminal Location Support of Vent StackChanging the Flue Outlet InstallationsCanadian Installations Natural Draft Vertical Venting Category Venting Installation TipsVenting Configurations InstallationHeight TerminationCommon Venting System Certified Vertical Venting Combustion Air Air InletHorizontal Through-the-Wall Venting Category Horizontal Through-the-Wall Venting CategoryEquivalent Direct Vent Horizontal Through- the-WallModel Certified Maximum Combustion Air Inlet VentingDirect Vent Vertical Direct Vent VerticalFreeze Protection Outdoor InstallationControls Models 302B-902B Heater Sequence of OperationExternal Lights Color Indication Code Condition Ignition ModuleLow Water Cut-Off Optional High Limit Manual ResetFlow Switch High and Low Gas Pressure SwitchesPump Time Delay UDB Diagnostic BoardUDB Fault History Table R UDB Fault Messages Model 10F 20F 30F Min. Flow Max Flow Gpm 87%-Efficiency Boilers Special InstructionsWater Piping Venting Appliance CategoriesCondensate Management Vertical Venting CategoryVent Terminal Location 752BE Combustion Air 902BE 30’ 80’ Certified Maximum Combustion Air Air Inlet Model VentingDirect Vent Horizontal Through- the-Wall ABS Cpvc Wiring Diagram Pre Start-up START-UPStart-Up Blower AdjustmentMain Burner Adjustment Pilot Turn-Down Test Safety InspectionLeak Test Procedure Dual-Seat Gas Valves Follow-UpLeak Test Post Start-Up CheckTo Turn Off Gas To Appliance OperationLighting Instructions Step TroubleshootingPreventive Maintenance Schedule MaintenanceSuggested Minimum Maintenance Schedule As Required WeeklySemi-Annually AnnuallyInside Air Contamination AppendixLimited Parts Warranty HI Delta Types H and WH Limited Parts Warranty HI Delta Type P START-UP Checklist for FAN-ASSISTED Raypak Products Important Instructions for the Commonwealth of Massachusetts
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302B, 902B specifications

Raypak is a prominent name in the heating industry, particularly known for its advanced technology and robust design in residential and commercial heating solutions. Two of their notable models, the Raypak 302B and 402B, exemplify innovation and efficiency in hydronic heating systems, designed to meet diverse needs while ensuring optimal performance.

The Raypak 302B and 402B are high-efficiency boilers that utilize gas-fueled systems. The 302B model has a heating capacity of 302,000 BTU/h, while the 402B boasts a maximum capacity of 402,000 BTU/h. This range of heating output makes these models suitable for a variety of applications, from residential heating needs to larger commercial spaces that require a reliable heat source.

One of the standout features of the Raypak 302B and 402B is their use of fire-tube heat exchanger technology. This design promotes efficient heat transfer and allows for lower emissions, thus minimizing the environmental impact. The fire-tube design also contributes to a longer lifespan and reduced maintenance costs, making these boilers a cost-effective solution over time.

Equipped with advanced control systems, the Raypak 302B and 402B ensure precise temperature regulation and improved energy usage. The digital display provides real-time feedback and diagnostics, enhancing user experience and simplifying troubleshooting. These models are also compatible with various building management systems, providing users with versatility in integration to optimize building performance.

In addition to their technological advancements, these boilers are designed with user safety and convenience in mind. They include features such as built-in safety controls, easy access for service and maintenance, and a compact footprint to fit into tight spaces. Their robust construction ensures durability, which is crucial for systems that operate under high demand.

Moreover, both models have been engineered to succeed in various climates, making them reliable choices for users in diverse geographical locations. With their energy-efficient operation, reliable performance, and advanced features, the Raypak 302B and 402B embody quality and innovation in the heating market, ensuring comfortable environments while lowering energy costs and environmental footprints.
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