11
MEASURING INLET GAS PRESSURE
AND TESTING GAS LEAKGAE
The appliance and its gas connections must be measured inlet gas pressure and leak tested
before placing the unit in operation for properly performing and safety.
This is 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 on to keep the unit running
until the unit shut 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 to the right.
4. Connect the manometer to the pressure port.
5. Re-open the manual gas valve. Check to see
that there are no gas leaks.
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 pressure within 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 piping
system by unplugging the unit and turning off the main gas valve during any pressure
testing of the gas supply piping system at test pressures above 3kPa.
1. Remove the screw for pressure port
located on the gas inlet.
2. Connect the manometer to the pressure
port.
3. Check the inlet gas pressure.
