MasterTemp Pool and Spa Heater P/N 474131 Rev. M 8/2020
18
TESTING GAS LEAKS AND GAS PRESSURE
Lightly loosen the
small screw inside the pressure tap,
and attach/connect the manometer hose.
Figure 11.
NOTE: “SEE MAINTENANCE SECTION, PAGE 55 FOR “CHECKING THE GAS CONTROL VALVE”
Before operating the heater, the heater and its gas connections must be leak tested. Do NOT use an open ame 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. Improper installation, incorrect adjustment, 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. If it is necessary
to adjust the gas valve, this must be done by only by a qualified service agency. These instructions are for the use of qualified
service technicians only!
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 11. 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
on page 19), regulate the incoming gas pressure.
Section 1. Installation
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