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4.5 MEASURING INLET GAS PRESSURE AND TESTING GAS LEAKAGE
The appliance and its gas connections must be measured for inlet gas pressure and leak tested before
placing the unit in operation for correct performance and safety. This is only to be done by a licensed
professional.
●
Shut off the manual gas valve on the supply gas line.
● Open a faucet. The unit should turn on and the gas in the gas pipe line should be purged. Leave the
faucet on to keep the unit running until the unit shuts down due to lack of gas supply. Then shut the
faucet off.
● Remove the screw for the pressure port located on the gas inlet of the water heater shown in the
diagram to the right.
● Connect the manometer to the preaaure port.
● Re-open the manual gas valve. Check to see that there are no gas leaks.
● Open some of the fixtures that use the highest flow rate to turn on the water heater.
● Check the inlet gas pressure. When the water heater is on a maximum operation capacity, the inlet
gas pressure point must be within the appropriate range. (Please refer to p.4)
● This appliance and its individual shut-off valve must be isolated from the gas supply piping system by
unplugging the unit and turning off the main gas valve during any pressure measuring stage of the gas
supply piping system at test pressures above 3kPa.
4.6 WATER CONNECTIONS
HOT WATER
OUTLET
COLD WATER
INLET
11
1.Remove the screw for pressure port
located on th e gas inlet.
2.Connect the manometer to the pressure
port.
3.Check the inlet gas pressure.
FILTER AND
DRAIN PLUG
GATE OR BALL
VALVE ON INLET
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