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GAS SUPPLY CONNECTIONS
Gas piping must have a sediment trap ahead of the
heater gas controls, and a manual shut off valve located
outside the heater jacket. All gas piping should be tested
after installation in accordance with local codes.
MANUAL SHUT OFF VALVE
GAS INLET HEATER JACKET
SEDIMENT GAS
TRAP UNION VALVE
Fig. #8090.0
CAUTION: The heater and its manual shut off valve must
be disconnected from the gas supply during any pressure
testing of that system at test pressures in excess of 1/
2 Psig (3.45 KPA). Dissipate test pressure in the gas
supply line before reconnecting the heater and its manual
shut off valve to gas supply line. FAILURE TO FOLLOW
THIS PROCEDURE MAY DAMAGE THE GAS VALVE.
OVER-PRESSURIZED GAS VALVES ARE NOT COV-
ERED BY WARRANTY. The heater and its gas connec-
tions shall be leak tested before placing the appliance in
operation. Use soapy water for leak test. Do NOT use
open flame.
NOTE: Do not use teflon tape on gas line pipe thread.
A flexible sealant is recommended.
A minimum of 7 in. W.C. and a maximum of 10.5 in.
W.C. upstream pressure under load, and no load condi-
tions must be provided for natural gas or a minimum of 12
in. W.C. and a maximum of 14 in. W.C. for propane gas.
GAS PRESSURE REGULATOR
The gas pressure regulator is preset and sealed at 4
in. W.C. for natural gas, and 11 in. W.C. for propane gas.
Between the gas valve and the burners is a 1/8” pipe plug.
The pressure at this point, taken with a manometer,
should be about 3.7 in. W.C. natural gas and 10.5 in.
W.C. propane gas. If an adjustment is needed, remove
seal and turn adjustment screw clockwise to
increase pressure or counter clockwise to de-
crease pressure
GAS PRESSURE MANOMETER
TEST UPSTREAM
MANUAL
SHUT-OFF
VALVE
GAS PRESSURE TEST
AT GAS VALVE
GAS PRESSURE TEST
AT HEATER
Fig. # 8149.0
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