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PDV Series
ICON System Gas Control Testing & Replacement
Line Pressure
The Gas Control is designed for a maximum line pressure of 14.0" W.C. and a minimum
line pressure of 1.0" W.C. over the water heater's rated manifold pressure (check rating
plate). Line pressure must be check with the main burner on and off to assure proper
readings.
Manifold Pressure Testing
(This procedure presumes a maximum line pressure of
14.0" W.C.)
Step 1.
Set the Gas Control to the "OFF" position.
Step 2.
Remove pressure tap plug and install 1/8"
NPT pipe, coupling & pressure tap.
Step 3.
Connect manometer to pressure tap.
Step 4.
Follow instructions located on the lighting
instructions label and proceed to light the
main burner and observe manometer
reading.
Step 5.
Proper operating range for Natural Gas is
4.0" ±0.5" W.C. Proper operating range
for Propane gas is: 10.0" ±0.5" W.C.
Step 6.
If pressure is within the range specified in
the previous step, set Gas Control knob to
the "OFF" position, remove manometer
and pressure tap, and replace pressure
tap plug. Check for gas leaks prior to
placing water heater back into operation
by following the instructions located on
the lighting label or the lighting
instructions located in the installation and
operation manual.
Step 7.
If gas pressure is outside the specification
noted above, refer to "ICON System Gas
Control Testing, Disassembly and
Replacement" to replace gas control or
valve body.
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