Rheem Professional Powered Damper Series Use and Care Manual - Page 11

Gas Supply WARNING: Do not attempt to convert this water heater for use with a different type of gas other than the type shown on the rating plate. Such conversion could result in hazardous operating conditions. The branch gas supply line to the water heater should be clean, properly sized steel pipe or other approved gas piping material. A union or ANSI design certified semirigid or flexible gas appliance connector should be installed in the gas line close to the water heater. The National Fuel Gas Code (NFGC) mandates a manual gas shut-off valve: See (NFGC) for complete instructions. If flexible connectors are used, the maximum length shall not exceed . 36" (91.4 cm) and must meet the requirements in ANSI Z21.24/CSA 6.10Connectors for Gas Appliances. Compound used on the threaded joints of the gas piping must be of the type resistant to the action of LP gas. Use compound sparingly on male threads only. Where a sediment trap is not incorporated as part of the appliance, a sediment trap shall be installed downstream of the equipment shutoff valve as close to the inlet of the appliance as practical at the time of the appliance installation. Do not use excessive force over [31.5 ft. lbs. (42.7 Nm)] in tightening the pipe joint at the gas control inlet, particularly if teflon pipe compound is used, as the valve body may be damaged. The inlet gas pressure to the water heater must not exceed 14.0 in. w.c. (3.5 kPa) w.c. for natural gas, and LP gas. For purposes of input adjustment, the minimum inlet gas pressure (with main burner on) is shown on the water heater rating plate. If high or low gas pressures are present, contact your gas supplier for correction. WARNING: Never use an open flame to test for gas leaks, as property damage, personal injury, or death could result. Leak Testing The water heater and its gas connections must be leak tested at normal operating pressures before it is placed in operation. Turn on the manual gas shut-off valve near the water heater. Use a soapy water solution to test for leaks at all connections and fittings. Bubbles indicate a gas leak that must be corrected. The factory connections to the gas control should also be leak tested after the water heater is placed in operation. Pressure Testing the Gas Supply System The water heater and its shut off valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psi (3.5 kPa). the gas supply piping system by closing it's individual manual shut off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psi (3.5 kPa) The water heater must be isolated from High Altitude This water heater is suitable and certified for use at high altitude. Refer to the altitude information on the water heater rating label for maximum allowable installation altitude. ! WARNING: Installations above the rated altitude as specified on the altitude label are not authorized and may result in improper and inefficient operation of the appliance, producing carbon monoxide gas in excess of acceptable limits, which could result in serious injury or death. 11