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4.6 MEASURING INLET GAS PRESSURE AND TESTING GAS LEAKAGE
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The appliance and its gas connections must be fully tested before the unit is put into operation for
proper performance and safety.
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Shut off the manual gas valve on the supply gas line.
Open a tap/outlet. The unit should turn on and the gas in the gas pipe line should be purged.
Leave the tap/outlet running until the unit shuts down due to lack of gas supply. Then turn off the
tap/outlet.
Remove the screw on the pressure port located on the gas inlet of the water heater shown in the
diagram to the above.
Connect the manometer to the pressure port.
Re-open the manual gas valve. Check to see that there are no gas leaks.
Open some of the fixtures that use a high flow rate to turn on the water heater.
Check the inlet gas pressure. When the water heater is at a maximum operation capacity, the inlet
gas pressure point must be within the appropriate range. (Please refer to p.4)
NOTE: M20 UNIT SHOWN
IN EXAMPLE
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