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107123
VENT-FREE NATURAL GAS LOG HEATER
For more information, visit www.desatech.com
LO
HI
OFF
Pilot
Figure 40 - Control Knob and Ignitor But-
ton Location
5. Turn control knob counterclockwise
C-clockwise
to the PILOT position.
Press in control knob for five (5) sec-
onds (see Figure 40).
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 or less. This will allow
air to bleed from the gas system.
• If control knob does not pop out
when released, contact a qualified
service person or gas supplier for
repairs.
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 stay lit, con-
tact a qualified service person or gas
supplier for repairs. Until repairs are
made, light pilot with match. To light
pilot with match, see Manual Light-
ing Procedure.
OPERATING
HEATER
Continued
Figure 41 - Pilot
CAUTION: Do not try to adjust
heating levels by using the equip-
ment shutoff valve.
Control Knob
Ignitor Button
Thermocouple
Ignitor Electrode
Pilot Burner
TO TURN OFF GAS
TO APPLIANCE
1. Follow steps 1 through 5 under Light-
ing Instructions, pages 19 and 20.
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.
Shutting Off Heater
1. Turn control knob clockwise
Clockwise
to the OFF position.
Shutting Off Burners Only (pilot
stays lit)
1. Turn control knob clockwise
Clockwise
to the PILOT position.
THERMOSTAT
CONTROL
OPERATION
The thermostat control knob can be set to
any comfort level between Hi and Lo. The
thermostat will gradually modulate the
heat output and flame height from higher
to lower settings, or pilot, in order to
maintain the comfort level you select.
The ideal comfort setting will vary by
household depending upon the amount of
space to be heated, the output of the
central heating system, etc.
Note:
Selecting the Hi setting with the
control knob will cause the burners to
remain fully on, without modulating down
in most cases.
MANUAL LIGHTING
PROCEDURE
INSPECTING
BURNERS
Check pilot flame pattern and burner flame
patterns often.
PILOT FLAME PATTERN
Figure 42 shows a correct pilot flame pattern.
Figure 43 shows an incorrect pilot flame
pattern. The incorrect pilot flame is not touch-
ing the thermocouple. This will cause the
thermocouple to cool. When the thermo-
couple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown
in Figure 43
• turn heater off (see To Turn Off Gas to
Appliance, page 19 [manually-controlled
models] or page 20 [thermostat-con-
trolled models])
• see Troubleshooting, pages 22 through 24
Figure 42 - Correct Pilot Flame Pattern
Figure 43 - Incorrect Pilot Flame Pattern
Thermocouple
Pilot Burner
Thermocouple
Pilot Burner
7. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob.
Note:
If pilot goes out, repeat steps
3 through 7. This heater has a safety
interlock system. Wait one (1) minute
for system to reset before lighting
pilot again.
8. Turn control knob counterclockwise
C-clockwise
to desired heating level. The
burners should light. Set control
knob to any heat level between HI
and LO.