Gas Control Testing & Replacement - Bradford White ECO-DEFENDER EURG2DV40S N Series Service Manual

UDV Series
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. Position the gas control knob in the "OFF"
position.
Step 2. Remove the pressure tap plug and install
a 1/8" NPT pipe, coupling & pressure tap.
Step 3. Connect a manometer to the pressure
tap.
Step 4. Follow instructions located on the lighting
instruction label and proceed to light the
main burner and observe the manometer
readings.
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 the Gas Control
knob to the "OFF" position, remove
manometer and pressure tap, and replace
pressure tap plug.
Step 7. Check for gas leaks prior to placing water
instructions located on the lighting label,
or the lighting instructions located in the
installation and operation manual.
Step 8. If the gas pressure is outside of the
specification noted above, refer to the
"Gas Control Testing and Replacement"
to replace gas control on page 12.
UDV SERVICE PROCEDURE III
Gas Control Testing and Replacement
13
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