Use and Care Manual

-9-
Gas Piping
3/8” NPT PIPE NIPPLE
PIPE NIPPLE
1/8” NPT PLUG TAP
REDUCER BUSHING
TO 1/8” NPT
SEDIMENT
TRAP
TEST GAUGE
CONNECTION
TEE JOINT
TEE JOINT
CLOSED
OPEN
GROUND JOINT UNION
APPLIANCE GAS INLET
FROM GAS ME
TER
3 (76.2 MM)
MINIMUM
CAP
MANUAL SHUTOFF
VALVE
GAS CONNECTION
1. We recommend using only new black iron or steel pipe. CHECK LOCAL CODES.
2. The gas supply line shall be sized and installed to provide a sufcient supply of gas to meet the maximum
demand of the heater without undue loss of pressure.
3. The sealant used on the threaded joints of the gas pipe must be a type resistant to the action of L.P. Gas. (This
sealant should be applied lightly to main threads to ensure excess sealant does not enter lines.)
4. The supply system must include a manual shut off valve and connection in the line, so the heater can be
disconnected for servicing. (See Figure 19).
5. Include a drip leg (trap) and a plugged 1/8” N.P.T. tapping in the line. The tapping should be accessible for
test gauge connections upstream of the gas supply connection to the heater.
Pressure
Nat. Gas 7” W.C to 10.5” W.C.
Nat. Gas 178 mm W.C. to 267 mm W.C.
L.P. Gas 11” W.C. to 14” W.C.
L.P. Gas 280 mm W.C. to 356 mm W.C.
IMPORTANT: Hold the gas inlet of the appliance with wrench when connecting it to gas piping and/or ttings.
CHECK AFTER GAS CONNECTION
1. Make sure the control of the heater is in the “OFF” position.
2. Open the manual shut off valve. Test for leaks by applying liquid detergent to all joints. Check all joints from
gas meter to thermostat gas valve. (Bubbles forming indicate a gas leak)
3. Correct any leak defect at once.
WARNING: For L.P. Gas, use PRESSURE REGULATED gas supply. Do not directly connect LP supply tank to the
pressure regulator on the heater. The LP supply tank must have its own separate pressure regulator that can
reduce the supply tank gas pressure down to a maximum of 14 inches (355 mm) of water column pressure.
WARNING: All gas piping and connections must be tested for leaks after installation or servicing. All leaks must
be corrected immediately.
UNSCREW TWO NUTS
Figure 17 Figure 18
Figure 16
Figure 19