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10 Section D). In service mode, monitor pressure to assure it does not drop below 1 inch from its idle reading. If
gas pressure is out of range or pressure drop is excessive, contact the gas utility, gas supplier, qualified installer,
or service agency to determine correct action that is needed to provide proper gas pressure to the unit. If Gas
Pressure is within normal range proceed to Step 6.
6. Exit test mode, then turn power off and shut off gas supply at the manual gas valve before disconnecting the
hose from the gas monitoring device. Tighten screw on the pressure tap and turn gas on. Check for leaks with
soapy solution. Bubbles will appear on the pipe to indicate a leak is present.
Ensure the pressure tap screw is properly tightened to prevent gas leaks. Failure to do so could cause substantial
property damage, severe personal injury, or death.
The gas piping must be sized for the proper flow and length of pipe to avoid pressure drop. The gas meter and
regulator must be properly sized for the total gas load. If you experience a pressure drop greater than 1" w.c. (.87
kPa), the meter, regulator or gas line may be undersized or in need of service. You can attach a manometer to
the incoming gas drip leg after removing the cap. The gas pressure must remain between 3.5" (.87 kPa) and 14"
(3.5 kPa) during stand-by (static) mode and while in operating (dynamic) mode.
If an in-line regulator is used, it must be a minimum of 10 feet from the boiler. It is very important that the
gas line is properly purged by the gas supplier or utility. Failure to properly purge the lines, or improper
line sizing, will result in ignition failure.
This problem is especially noticeable in NEW LP installations and
empty tank situations. This situation can also occur when a utility company shuts off service to an area to provide
maintenance to their lines. This gas valve must not be replaced with a conventional gas valve under any
circumstances.
DO NOT adjust or attempt to measure gas valve outlet pressure. The gas valve is factory-set for the correct outlet
pressure and requires no field adjustment. Attempts by the installer to adjust or measure the gas valve outlet
pressure could result in damage to the valve and cause substantial property damage, severe personal injury, or
death.
Ensure that the high gas pressure regulator is as least 6
– 10 feet upstream of the appliance. Failure to do so
could result in substantial property damage, severe personal injury, or death.
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