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WARNING: Never
use an open flame to
test for gas leaks, as
bodily injury, property
damage 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 thermostat
should also be leak tested after the water
heater is placed in operation.
Pressure Testing the Gas Supply System
The water heater and its manual gas shut-off
valve must be disconnected
from the gas
supply piping system during any high
pressure testing of that system at pressures in
excess of 1/2 psi (14″ w.c.).
The water heater must be isolated from the
gas piping system by closing the manual gas
shut-off valve during any pressure testing of
the gas supply piping at pressures equal to or
less than 1/2 psi (14″ w.c.).
Gas Supply
Check the markings on the water heater’s
rating plate to be certain the type of gas
being furnished corresponds to that for which
the water heater is built. The water heater can
be converted from natural gas to LP or vice
versa. See the Conversion Instructions
section of this manual.
The branch gas supply line to the water
heater should be clean 1/2″ black steel pipe
or other approved gas piping material.
A ground joint union or ANSI design
certified semi-rigid or flexible gas
appliance connector should be installed in the
gas line close to the water heater. A manual
gas shut-off valve should be at least 5 ft.
above the floor and readily accessible.
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.
A sediment trap should be installed at the
bottom of the gas line.
Do not use excessive force (over 31.5 ft lbs.)
in tightening the pipe joint at the thermostat
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″ w.c. for natural or 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.