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UDV Series
Burner Inspection
At periodic intervals (every 6 months) a visual inspection should be made of the pilot and main
burner for proper operation and to assure no debris is accumulating.
Pilot flame should be stable, some causes for an unstable pilot flame are:
a) Water heater vent is less than the allowable vent length.
b) Gas pressure is out of specification.
c) Pilot flame not fully engulfing spark/flame sensor.
Main burner should light smoothly from pilot and
burn with a blue flame with a minimum of yellow
tips.
Main burner must be free from any debris
accumulation that may affect burner operation
(see burner cleaning procedure below).
Burner Cleaning
Step 1.
Position the gas control knob in
the "OFF" position.
Step 2.
Turn off the gas supply to the
water heater.
Step 3.
Disconnect the igniter wire from
the gas control.
Step 4.
Disconnect the red and white
pilot wires from the gas control.
Step 5.
Remove the outer jacket door.
Remove the inner doors per
service procedure VI on page 16.
Step 6.
Disconnect the pilot tube (7/16"
wrench) from the gas control.
Step 7.
Disconnect the main feedline
(3/4" wrench) from the gas
control.
Step 8.
Remove the burner assembly
from the combustion chamber.
UDV SERVICE PROCEDURE I
Burner Operation Inspection,
Cleaning and Replacement
9
9
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