Gas Pressure, Gas Leak Testing

This gas piping must be installed in accordance with all local and provincial or state codes or, in the absence of such, the latest edition of “Natural Gas and Propane Installation Code” CAN/CSA-B149.1(Canada), or “National Fuel Gas Code” ANSI Z223.1 (NFPA 54) (U.S.A.).

Note: When installing gas piping, apply sealing compounds approved for use with natural and propane gas.

1.Install a readily accessible manual shut-off valve in the gas supply line as recommended by the local utility. The owner/operator must be shown the location of this valve and be given instructions on how to use it to shut off the gas to the heater.

2.Install a drip leg (if not already incorporated as part of the water heater) as shown. The drip leg must be no less than 76mm (3 in.) long for the accumulation of dirt, foreign material, and water droplets.

3.Install a ground joint union between the gas control /thermostat and the manual shut-off valve. This is to allow easy removal of the gas control/thermostat.

4.Turn the gas supply on and check for leaks. Use a chlo- ride-free soap and water solution (bubbles forming indi- cate a leak) or other approved method.

Gas Pressure

WARNING

Exposure to a higher gas supply pressure may cause damage to the control, resulting in explosion or fire. Consult your local gas supplier and gas authorities. DO NOT PUT INTO SERVICE IF OVER-PRESSURIZATION HAS OCCURRED.

Important: The gas supply pressure must not exceed the maximum supply pressure as stated on the water heater’s data plate.

Gas Leak Testing

Important: This water heater and its gas connection must be leak tested before placing the appliance in operation.

•If the code requires the gas lines to be tested at a pres- sure exceeding 14 in. w.c. (3.5 kPa), the water heater and its manual shut-off valve must be disconnected from the gas supply piping system and the line capped.

•If the gas lines are to be tested at a pressure less than 14 in. w.c. (3.5 kPa), the water heater must be isolated from the gas supply piping system by closing its manu- al shut-off valve.

U.L. recognized fuel gas and (CO) detectors are recom- mended in all applications and should be installed using the manufacturer’s instructions and local codes, rules, or regu- lations.

Note: Air may be present in the gas lines and could prevent the burner from lighting on initial start-up. The gas lines should be purged of air by a qualified service technician after installation of the gas piping system.

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