| in the water heater. The valve’s relief pressure must not |
| 22). Before performing any electrical service work, label all | ||||||||
| exceed the working pressure of the water heater as stated |
| wires to avoid connection errors. If wiring has to be | ||||||||
| on the data plate. |
| replaced, use only TYPE TEW 105°C wire, (except igniter | ||||||||
| Important: Only a new temperature and pressure relief |
| wires). If there is a problem with igniter wires, replace ignit- | ||||||||
| valve should be used with your water heater. Do not use an |
| er assembly in its entirety. In locations where a sump pump | ||||||||
| old or existing valve as it may be damaged or not adequate |
| failure, flooding or exposure to water may be present, a | ||||||||
| for the working pressure of the new water heater. Do not |
| ground fault receptacle is recommended. | ||||||||
| place any valve between the relief valve and the tank. |
| Important: Do not use an extension cord to connect the | ||||||||
| The Temperature and Pressure Relief Valve: |
| water heater to an electrical outlet. | ||||||||
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| • Ensure that the water heater and the outlet are proper- | |||||||||
| • Must not be in contact with any electrical part. |
| ly grounded. Failure to properly ground the heater can | ||||||||
| • Must be connected to an adequate discharge line. |
| prevent the unit from operating. | ||||||||
| • Must not be rated higher than the working pressure |
| • Ensure that the water heater is installed in accordance | ||||||||
| shown on the data plate of the water heater. |
| with prevailing provisions of local codes, or, in the | ||||||||
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| absence of such, the latest edition of “Canadian |
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| Electrical Code (CAN/CSA C22.1), Part I” (Canada) |
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| or “National Electrical Code” (NFPA 70) (U.S.A.). |
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| TEMPERATURE AND |
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| PRESSURE RELIEF |
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| Before plugging in the water heater, always make sure: |
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| VALVE |
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| • The voltage and frequency correspond to that specified |
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| on the water heater wiring diagram. |
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| • The electrical outlet has the proper overload fuse or |
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| DISCHARGE LINE 19mm (3/4 in.) |
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| breaker protection. | ||
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| MIN. DO NOT CAP OR PLUG. |
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| • Fill the tank with water and check all connections for | ||
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| leaks. Open the nearest hot water faucet and let it run |
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| DRAIN PAN. CONNECT TO |
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| for 3 minutes to purge the water lines of air and sedi- | |||
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| PROPERLY OPERATING |
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| ment and to ensure complete filling of the tank. The | ||||
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| FLOOR DRAIN. |
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| electrical power may then be turned on. Verify proper |
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| operation after servicing. |
| Figure 19 Temperature & Pressure Relief Valve |
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| Note: Always reference the wiring diagram for the correct | |||||||
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| electrical connections. | ||||||||
| Installation |
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| The Discharge Line/Driptube: |
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| • Must not be smaller than the pipe size of the relief valve |
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| or have any reducing coupling installed in the discharge |
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| line. |
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| • Must not be capped, blocked, plugged or contain any |
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| valve between the relief valve and the end of the dis- |
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| charge line. |
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| • Must terminate a maximum of 300mm (12 in.) (Canada) |
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| or 150mm (6 in.) (U.S.A.) above the floor. |
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| • Must be capable of withstanding 121°C (250°F) without |
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| distortion. |
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| • Must be installed to allow complete drainage of both the |
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| valve and discharge line. |
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| Electrical Supply |
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| IMPORTANT: The electrical controls used inside the gas |
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| control/thermostat mounted on this water heater are polar- |
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| ity sensitive. Ensure the electrical supply is connected cor- |
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| rectly in the receptacle box. Failure to connect correctly will |
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| prevent the unit from functioning properly (see Figures 20 & |
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| WARNING: |
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| When the unit is plugged in, 120VAC is pres- |
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| ent at the electric connections of the gas |
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| control/thermostat. |
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| Figure 20 Robertshaw Wiring Diagram - Junction Box. | |||||||
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– 17 –
