Gas Control Testing & Replacement - Bradford White LC2PV50H76N Service Manual

Condensing PV 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). The line pressure must be checked with the main burner both 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 the pressure tap plug and install
1/8" NPT pipe, coupling & pressure tap.
Step 3. Connect a manometer to the 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 the pressure is within the range specified
in the previous step, set the gas control
knob to the "OFF" position. Remove the
manometer and pressure tap, and replace
the pressure tap plug. Check for gas leaks
prior to placing the 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 the gas pressure is outside the
specification noted above, refer to the Gas
Control Testing & Replacement section on
page 27 to replace the gas control or valve
body.
25
25