Gas Control Testing & Replacement - Bradford White UPV Series Service Manual

UPV Service Procedure VII – Gas Control Testing and 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 checked 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 (3/16"
Allen wrench) and install 1/8" NPT
pipe, coupling, and 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 5.0" ±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.
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