Owner`s manual

GP-MSJW-CX-07B
STW-JZ / IW Manual
RD: Sept, 2005
RL: 7B
KH
DO NOT use pressures greater than 1/2 psig. to
pressure check the heater.
TEST FOR LEAKS: All gas piping and
connections must be tested for leaks after the
installation is completed.
Apply soap suds solution to all connections and
joints and if bubbles appear, leaks have been
detected and must be corrected. DO NOT USE A
MATCH OR OPEN FLAME OF ANY KIND
TO TEST FOR LEAKS. NEVER OPERATE
THE HEATER WITH LEAKING
CONNECTIONS.
The supply system should be checked first with
heater turned "OFF" followed by another check
IMPORTANT:
The minimum supply-line pressure at the inlet
to the heater regulator must not, in any
instance, be lower than 5.5 inches of water
column pressure for natural gas and 11.0
inches of water column pressure for propane
gas. The supply line gas pressure must be
checked with all the heater (s) operating.
Installation of a gas line (trap) “drip leg" is
required at the inlet connection tee following
the pipe drop to the heater. Failure to provide
a “drip leg” could result in condensation and
foreign matter passing into the gas valve.
Failure to install a “drip leg” in the gas line
will void the warranty.
TABLE 5
GAS TYPE LINE PRESSURE
INCH WATER COLUMN
MINIMUM
MAXIMUM
MANIFOLD PRESSURE
INCH WATER COLUMN
AT-TAP IN GAS VALVE
Natural Gas
Propane
5.0 14.0
11.0 14.0
3.5
10.0
NOTE: Access to the manifold pressure test port is
on the top of the valve. A 3/16" Allen Wrench is
necessary to check this. When checking or setting
the manifold pressure, a water manometer
should be used. Gauges which measure in
ounces per square inch or pounds per square inch
are not accurate enough to properly measure or set
the pressure. PLEASE SEE NEXT SECTION ON
HEATER EXPANSION.
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