21
Connecting the Gas Supply
• The following is an LP gas piping example for the 2-lb. system
with multiple regulators.
Full-size gas pipe
Full-size gas pipe
1/2" pipe
Gas regulator
(12" WC)
2 PSI
1/2"–3/8"
pipe
Gas tank
Inlet Gas Pressure
Warning
Inlet gas pressure should be measured by a licensed
professional only. The water heater cannot function properly
without sufficient inlet gas pressure.
• The appliance and its individual 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
½psi(3.5kPa).
• The appliance must be isolated from the gas supply piping
system by closing its individual manual shut off valve during
any pressure testing of the gas supply piping system at test
pressures equal to or less than ½psi(3.5kPa)
• The inlet gas pressure must be maintained between 3.5"
and 10.5" WC for natural gas and between 8" and 13" WC for
liquefied propane.
To measure the inlet gas pressure:
1
Shut off the manual gas valve on the gas supply line.
Gas
2
Open a hot water faucet. The water heater should turn on and
the gas in the gas supply line will be purged.
3
Leave the faucet on until the water heater shuts down due to
a lack of gas supply, and then turn off the hot water faucet.
To Next Page
Loading...