Inspecting Burners - Desa 103426-01 Owner's Operation And Installation Manual

UNVENTED NATURAL GAS LOG HEATER
OPERATING
HEATER
Manually-Controlled Models
Continued
4. Wait five (5) minutes to clear out any
gas. Then smell for gas, including
near the floor. If you smell gas,
STOP! Follow "B" in the safety in-
formation above. If you don't smell
gas, go to the next step.
5. Press in control knob and turn coun-
terclockwise to the PILOT po-
Clockwise
sition. Keep control knob pressed in for
five (5) seconds (see Figure 28, page 15).
Note: You may be running this
heater for the first time after hook-
ing up to gas supply. If so, the con-
trol knob may need to be pressed in
for 30 seconds. This will allow air to
bleed from the gas system.
6. With control knob pressed in, press
and release ignitor button. This will
light pilot. The pilot is attached to the
front burner. If needed, keep press-
ing ignitor button until pilot lights.
Note: If pilot does not light, contact
a qualified service person or gas sup-
plier for repairs. Until repairs are
made, light pilot with match. To light
pilot with match, see Manual Light-
ing Procedure, column 2.
7. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob.
• If control knob does not pop out
when released, contact a qualified
service person or gas supplier for
repairs.
Note: If pilot goes out, repeat steps
3 through 7.
Ignitor Electrode
Thermocouple
Figure 29 - Pilot
8. Push in and turn control knob coun-
terclockwise to the HIGH position.
Both burners should light. Set con-
trol knob to desired setting.
VARIABLE CONTROL
The variable control valve can be set to
any heat setting and flame height desired,
by simply turning the control knob until
that setting is attained. Even the lowest
setting provides realistic flames and glow-
ing embers from two burners. Selecting
higher settings produces greater heat
output. This results in increased heating
comfort.
WARNING: Do not operate
heater between locked positions.
CAUTION: Do not try to ad-
just heating levels by using the
manual shutoff valve.
TO TURN OFF GAS
Shutting Off Heater
1. Press in and turn control knob clock-
wise
2. Turn the control knob clockwise
Clockwise
3. Press in control knob and turn clock-
wise
Shutting Off Burners Only (pilot
stays lit)
1. Turn the control knob clockwise
Clockwise
2. Press in and turn control knob clock-
wise
MANUAL LIGHTING
1. Follow steps 1 through 5 under Light-
ing Instructions, page 15.
Pilot Burner
2. Depress control knob and light pilot
with match.
3. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob. Now
follow step 8, above.
OPERATION
TO APPLIANCE
to the HIGH position.
Clockwise
to the PILOT position.
to the OFF Position.
Clockwise
to the HIGH position.
to the pilot position.
Clockwise
PROCEDURE
16
INSPECTING
BURNERS
Check pilot flame pattern and burner flame
patterns often.
PILOT FLAME PATTERN
Figure 30 shows a correct pilot flame pat-
tern. Figure 31 shows an incorrect pilot
flame pattern. The incorrect pilot flame is
not touching the thermocouple. This will
cause the thermocouple to cool. When the
thermocouple cools, the heater will shut
down.
Thermocouple
Pilot Burner
Figure 30 - Correct Pilot Flame Pattern
Thermocouple
Figure 31 - Incorrect Pilot Flame Pattern
If pilot flame pattern is incorrect, as shown
in Figure 31
• turn heater off (see To Turn Off Gas
to Appliance, page 15 [thermostat-
controlled models] or page 16
[manually-controlled models])
• see Troubleshooting, pages 18
through 20
Pilot Burner
Continued
103426