Gas Connections
The gas supply lines must meet all requirements of the National Fuel Gas Code ANSI
The minimum permissible gas supply pressure for the purpose of input adjustment is 1.5” water column (.37 kPa) above the operating manifold pressure for natural gas and 1.0” (.25 kPa) water column for L.P. gas. See the rating plate and combination gas control for the manifold pressure and gas type. The maximum permissible gas supply pressure is 14.0” water column (3.5 kPa) for natural gas and liquefied petroleum gases/propane gas.
1.Connect this water heater only to the type of gas (Natural or Propane gas) as shown on the rating plate. Use clean 1/2 inch (1.3 cm) black iron pipe. (Dirt and scale from the pipe can enter the combination control and cause it to malfunction). The inlet gas line must have a minimum length of 3” (7.6 cm) drip leg (sediment trap) installed as close to the water heater’s combination gas control as possible. A ground joint union must be installed in the gas supply line feeding the water heater to permit servicing of the water heater. Compounds used on the threaded joints of the gas piping must be resistant to the action of liquefied petroleum gases/propane gas.
2.This water heater and its gas connection must be leak tested before placing the water heater in operation. Check for gas leaks with a soap and water solution and a brush or a commercial leak detector fluid. NEVER USE A
MATCH OR OPEN FLAME FOR TESTING!
CAUTION
The water heater and individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of the system at test pressures in excess of 1/2 psi (3.5 kPa). The water heater must be isolated from the gas supply piping system by closing its manual shutoff valve during any pressure testing of the gas supply system at test pressures equal to or less than 1/2 psi (3.5 kPa). The supply line must be capped when not connected to the water heater.
3.While checking for leaks care must be taken to prevent solution from contacting the electrical connections at the control. If electrical connections at the control become wet, they must be thoroughly dried before attempting to operate the water heater.
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