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3. Leave the faucet on until the boiler shuts down due to a lack
of gas supply, and then turn off the hot water faucet.
4. Remove the front cover by loosening the 2 Phillips head
screws securing it to the case.
CAUTION
Ensure that no cables are in the way before folding down
the PCB assembly. If the assembly is stuck, do not force
it. Doing so may damage the cables and result in serious
malfunctions. Check again to ensure that no cables or any
other parts are in the way before you proceed.
5. Loosen the screws indicated in the figure below and
connect a manometer to the pressure port. Reset the
manometer to zero before use.
6. Re-open the manual gas valve and check for leaks.
7. Open multiple fixtures that have high flow rates, such as
bathtub and shower faucets, to ramp the boiler up to its
maximum firing rate.
8. When the boiler reaches its maximum firing rate, check
the inlet gas pressure reading on the manometer. The gas
pressure must fall within the ranges specified on page 10.
Digital pressure
manometer
Connecting the Gas Supply
29
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