10
Once all the inspections have been performed, the piping
system must be leak tested. If the leak test pressure is
higher than the maximum permissible inlet pressure, you
must isolate the AdvantagePlus from the gas line before
testing. In order to do this, you must disconnect the
union and cap the inlet gas line. In the event the gas
valve is exposed to a pressure greater than 1/2 PSI, 14"
water column, the gas valve must be replaced.
Failure to follow all precautions could result in fire,
explosion or death! It is recommended that a soapy
solution be used to detect leaks. Bubbles will appear and
indicate a leak is present. The gas piping must be sized
for the proper flow and length of pipe to avoid unaccept-
able pressure drop. Both the gas meter and the gas reg-
ulator must be properly sized for the total gas load. If you
experience a pressure drop greater than 1" W.C., the
meter or regulator or gas line may be undersized or in
need of service. On the inlet side of the gas valve, there
is a 1/8" NPT plug. This plug can be removed to attach a
manometer. You can attach a meter to the incoming gas
drip leg by removing the cap and installing the meter. The
gas pressure must remain between 3.5" and 14" of water
column during stand-by and unit running heat cycle. If
an in-line regulator is used, it must be a minimum of 10
feet from the AdvantagePlus. It is very important that
the gas line is properly purged by the installer, gas
supplier or utility. Failure to properly purge the lines
or improper line sizing, will result in ignition failure
of the AdvantagePlus. The gas valve is a special
gas valve which has a Pressure Augmented Regulator
feature, as well as negative outlet pressure. This valve
must not be replaced with a conventional valve under any
circumstances. Make sure valve is in the “OFF” position
prior to turning gas supply on. As an additional safety
feature, this valve has a left hand thread on the outlet end,
and a special tamper resistant electrical connector.
n WARNING
Never use open flame to test for gas leaks, as
bodily injury or property damage could result.
n WARNING
DO NOT exceed input shown on water heater
rating label.
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