Service Manual

Step 5. Fully inspect burner door and rightside inner door gaskets forthe following:
>Tears >Other imperfectionsthat will inhibit properseal
>Missing Material >Gasket adhesion to inner door
>Cr
acks >Materialleft on combustion chamber (around opening)
>Dirt or debris
If the gasket is not effectedbyany of theabove,gasketreplacement is notrequired. If replacement
is
required, proceed to Inner Door GasketReplacementProcedure.
Inner Door Removal Procedure
Step1. Position gas control power switch to the “OFF”
position and unplug heater from wall outlet.
Step 2.Remove outer jacket burner access door.
Step3. Remove wire clip from main burner feedline.
Step 4. Inner Door Removal.
a)Disconnectthe spark igniter/flame sensor wireand the
simulated resistive device from the gas control (see photo 1).
b) Disconnect main burner feed line (¾” wrench), pilottube
(7/16" wrench) and igniter wire from gas con
trol (see photo 2).
c) Remove (2) ¼” hex drive screws from right side inner door
(see photo 3).
d) Remove (2) ¼” hex drive screws from flange section of
inner door (see photo 3).
e)Remove (3) 1/4" hexdrive screws from burner door
(see photos 4&5). The burner door and burner are
one-piece
.
f) Remove burner and inner door and inspect perstep5.
1
2
3
4
5
Simulated Resistive
Device
Spark Igniter/
Flame Sensor
Wire
Main Burner
Feedline
Pilot Tube
Igniter Wire
Right Side
Hex Drive
Screws
Flange Hex
Drive Screws
Burner Door
Hex Drive
Screws
Position #1
Position #2
Position #3
UTTW SERVICE PROCEDURE I
Burner and Inner Door/Gasket Removal,
Inspection, Replacement and Reinstallation
Page 14
Gas Control shown in the “OFF” position
R
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