Évaluations - 5, GPA: 4
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The expansion tank must have a minimum capacity of 5.6 litres (1.5 US gallons) for every 190 litres (50 US gallons) of stored water and be rated at the working pressure of the water heater. Contact the local water supplier or plumbing inspector for information on other methods to control this situation. Important: Do not plug or remove the temperature and pressure relief valve. Temperature and Pressure (T&P) Relief Valve For protection against excessive pressures and temperatures, a temperature and pressure relief valve must be installed in the opening marked “T&P RELIEF VALVE” (see Figure 19). This valve must be design certified by a nationally recognized testing laboratory that maintains periodic inspection of the production of listed equipment or materials as meeting the requirements of the “Standard For Relief Valves For Hot Water Supply Systems”, ANSI Z21.22/CSA 4.4”. The function of the temperature and pressure relief valve is to discharge water in large quantities in the event of excessive temperature or pressure developing WARNING Explosion Hazard • If the temperature and pressure relief valve is dripping or leaking, have a licensed plumber repair it. • Do not plug valve. • Do not remove valve. • Failure to follow these instructions can result in death or an explosion. – 16 – in the water heater. The valve’s relief pressure must not exceed the working pressure of the water heater as stated on the data plate. Important: Only a new temperature and pressure relief valve should be used with your water heater. Do not use an old or existing valve as it may be damaged or not adequate for the working pressure of the new water heater. Do not place any valve between the relief valve and the tank. The Temperature and Pressure Relief Valve: • Must not be in contact with any electrical part. • Must be connected to an adequate discharge line. • Must not be rated higher than the working pressure shown on the data plate of the water heater. Figure 19 Temperature & Pressure Relief Valve Installation TEMPERATURE AND PRESSURE RELIEF VALVE DISCHARGE LINE 19mm (3/4 in.) MIN. DO NOT CAP OR PLUG. DRAIN PAN. CONNECT TO PROPERLY OPERATING FLOOR DRAIN. The Discharge Line/Driptube: • Must not be smaller than the pipe size of the relief valve or have any reducing coupling installed in the discharge line. • Must not be capped, blocked, plugged or contain any valve between the relief valve and the end of the discharge line. • Must terminate a maximum of 300mm (12 in.) (Canada) or 150mm (6 in.) (U.S.A.) above the floor. • Must be capable of withstanding 121°C (250°F) without distortion. • Must be installed to allow complete drainage of both the valve and discharge line. Electrical Supply IMPORTANT: The electrical controls used inside the gas control/thermostat mounted on this water heater are polarity sensitive. Ensure the electrical supply is connected correctly in the receptacle box. Failure to connect correctly will prevent the unit from functioning properly (see Figures 20 & 22). Before performing any electrical service work, label all wires to avoid connection errors. If wiring has to be replaced, use only TYPE TEW 105°C wire, (except igniter wires). If there is a problem with igniter wires, replace igniter assembly in its entirety. In locations where a sump pump failure, flooding or exposure to water may be present, a ground fault receptacle is recommended. Important: Do not use an extension cord to connect the water heater to an electrical outlet. • Ensure that the water heater and the outlet are properly grounded. Failure to properly ground the heater can prevent the unit from operating. • Ensure that the water heater is installed in accordance with prevailing provisions of local codes, or, in the absence of such, the latest edition of “Canadian Electrical Code (CAN/CSA C22.1), Part I” (Canada) or “National Electrical Code” (NFPA 70) (U.S.A.). Before plugging in the water heater, always make sure: • The voltage and frequency correspond to that specified on the water heater wiring diagram. • The electrical outlet has the proper overload fuse or breaker protection. • Fill the tank with water and check all connections for leaks. Open the nearest hot water faucet and let it run for 3 minutes to purge the water lines of air and sediment and to ensure complete filling of the tank. The electrical power may then be turned on. Verify proper operation after servicing. Note: Always reference the wiring diagram for the correct electrical connections. Figure 20 Robertshaw Wiring Diagram - Junction Box. WARNING: When the unit is plugged in, 120VAC is present at the electric connections of the gas control/thermostat. – 17 – WARNING Electrical Shock Hazard • Disconnect power before servicing. • Replace all parts and panels before operating. • Failure to do so can result in death or electrical shock. SCREW MOUNTING BRACKET FLAMMABLE VAPOUR SENSOR (PULL TO REMOVE) COVER* * ROTATE LEFT (CCW) TO REMOVE Figure 21 Flammable Vapour Sensor (expl...
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