97-610, 97-6152 • REV. 7/04
OPERA
T
OR’S MANU
AL
PRESSURE W
ASHER
12
INSTALLATION
Before turning gas under pressure into piping, all open-
ings from which gas can escape should be closed. Im-
mediately after turning on gas, the system should be
checked for leaks. This can be done by watching the
1/2 cubic foot test dial for 5 minutes for any movement
or by soaping each pipe connection and watching for
bubbles. If a leak is found, make the necessary repairs
and repeat the above test.
Defective pipes or fittings should be replaced and not
repaired. Never use a flame or fire in any form to lo-
cate gas leaks — use a soap solution.
After the piping and meter have been checked com-
pletely, purge the system of air. DO NOT bleed the air
inside an enclosed room.
During pressure testing of the system at test pressures
in excess of 1/2 PSIG, the appliance and its individual
shut-off valve must be disconnected from the gas sup-
ply piping system or damage to the gas valve will oc-
cur.
Gas Pressure:
The ideal incoming gas pressure is 11 water column
inches or w.c.i. (min. 6 wc”, max. 14 wc” or 1/2 PSIG).
The correct operating manifold pressure for natural gas
is 3.5 wc” The operating manifold pressure for propane
gas is 10 wc” By adjusting the gas valve pressure regu-
lator between 3 and 4 wc” a side range can be achieved
for natural gas. Propane is 6-10 wc”.
If the desired input rating cannot be obtained within
the above manifold pressure adjusting range, then the
next size larger or smaller burner orifice should be
used.
CHECK LIST BEFORE
STARTING:
CAUTION! If “NO” is checked on any of the follow-
ing sixteen questions, do not operate this machine.
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