Service Manual

UTTW SERVICE PROCEDURE II
Burner Operation Inspection,
Cleaning and Replacement
Page 17
At periodic intervals (not more than6months) a visualinspection should be made of the main burner for proper operation
and toinsure no debris is accumulating.
Main burnershould lightsmoot
hly from pilot and burnwith a blue flame with a minimum of yellow tips.After
approximately 5 minutes of operation the burnerscreen will become radiant and the flame will soften and turnorange.If
the burn
erscreendoes not become radiant after 5 minutes of operation it must be cleaned(see burner cleaning procedure
below).
Main burner must be free from any debris accumulation that may a
ffect burner operation (see burner cleaning procedure
below).
DANGER
Under no circumstances shall flammable materials be used or stored in the vicinity ofthe water heater. If
flammable vapors are present, a fire or explosion may result causingproperty damage,personal injury or
death.
WARNING
Inner door andburner components maybe HOT when performing this operation. Take
necessary precaution to prevent personal injury.
¼” Hex Drive Manifold
Cover Screws
¼” Hex Drive Manifold
Bracket Screws
Manifold Cover
Main Burner Inspection, Cleaningand Replacement
Burner Cleaning
Step1. Remove burner and inner door assembly per SERVICE PROCEDURE I, steps 3 through 4.
Step 2.Remove manifold cover from burner inner door by removing (2) ¼” hex drive screws and then sliding
manifold coverto the right. Useastiff brush, compressed air and/o
rshop vacuum to removeany debris
build up from the manifold mount.
Step3. Remove manifold brackets from burner by removing (4) ¼” hex drive screws.
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17