Measuring Inlet Gas Pressure And Testing Gas Leakage - Takagi GS-20W-AU5 Installation Manual And Owners Manual

MEASURING INLET GAS PRESSURE AND TESTING GAS LEAKAGE

The appliance and its gas connections must be tested for leak and the inlet gas pressure must
be measured before placing the unit in operation for properly performing and safety.
Measuring inlet gas pressure and testing gas leakage are only to be done by a licensed
professional.
1. Shut off the manual gas valve on the supply gas line.
2. Open a faucet. The unit should turn on and the gas in the gas pipe line should purge. Leave the
faucet open to keep the unit running until the unit shuts down due to lack of gas supply. Then
shut the faucet off.
3. Remove the screw for the pressure port located on the gas inlet of the water heater shown in
the diagram below.
4. Connect the manometer to the pressure port.
5. Re-open the manual gas valve. Check to see that there are no gas leaks with a gas leak detec-
tor.
6. Open some of the fixtures that use the highest flow rate to turn on the water heater.
7. Check the inlet gas pressure. When the water heater is on a maximum burn, the inlet gas pres-
sure must be within the appropriate range. (Please refer to p. 3.)
This appliance and its individual shut-off valve must be isolated from the gas supply by unplug-
ging the unit and turning off the main gas valve during any pressure testing of the gas supply
piping system at test pressures above 3 kPa.
WARNING
WARNING
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