P/N 474131
Rev. D 27-06-11
14
TESTING GAS LEAKS
AND
GAS PRESSURE
Table 3.
Before operating the heater, the heater and its gas connections must be leak tested.
Do NOT use an open flame to test
for leaks.
Test all gas connections for leaks with soapy water.
The gas valve must be completely disconnected from the gas supply piping system during any pressure testing of that
system at test pressures in excess of 6.0 kPa (.87 psig).
TESTING THE GAS PRESSURE THROUGH THE COMBINATION GAS CONTROL VALVE
WARNING
Risk of fire and explosion.
Alteration, service, or maintenance of the Combination Gas Control Valve can lead to fire or
explosion, causing loss of life, personal injury, and/or property damage.
DO NOT ATTEMPT TO ADJUST THE GAS CONTROL
VALVE.
These instructions are for the use of qualified service technicians only!
1. Shut off the gas supply to the heater.
2. Loosen the small screw inside the pressure tap as shown in
Figure 7
.
3. Connect the manometer hose.
4. Open the gas supply to the heater.
5. Turn on the heater.
6. Take the gas pressure reading.
7. Turn off the heater.
8. Shut off the gas supply to the heater.
9. Disconnect the manometer hose.
10. Tighten the small screw inside the pressure tap.
11. Open the gas supply to the heater.
12 Verify that the seal connection in the pressure tap is closed by testing
for leaks with soapy water.
Note:
If the pressure reading is out of range, (see Table 3), regulate the
incoming gas pressure.
Section 3. Installation
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Lightly loosen the
small screw inside the pressure tap
and then attach/connect
the manometer hose.
Figure 7.
INLET GAS PRESSURE REQUIREMENTS
