www.desatech.com
120890-01D
17
OPERATION
Continued
WARNING: Damper handle
will be hot if heater has been
running.
1. STOP! Read safety information, page 16.
2. Make sure equipment shutoff valve is fully
open.
3. Turn control knob clockwise
to OFF
position.
4. Wait five (5) minutes to clear out any gas.
Then smell for gas, including near floor. If
you smell gas, STOP! Follow “B” in safety
information, page 16. If you don’t smell
gas, go to next step.
5. Turn control knob counterclockwise
to PILOT position. Press in control knob
for five (5) seconds (see Figure 20).
Note: You may be running this heater
for the first time after hooking up to gas
supply. If so, control knob may need to be
pressed in for 30 seconds or more. This
will allow air to bleed from 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.
Pilot is attached to front burner. If needed,
keep pressing ignitor button until pilot
lights.
Note: If pilot does not stay lit, contact a
qualified service person or gas supplier
for repairs. Until repairs are made, light
pilot with match. To light pilot with match,
see Manual Lighting Procedure.
7. Keep control knob pressed in for 30 sec
-
onds 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.
LO
HI
OFF
Pilot
Figure 20 - Control Knob and Ignitor
Button Location
Control Knob
Ignitor Button
Figure 21 - Pilot
Ignitor Electrode
Pilot Burner
Thermocouple
8. Turn control knob counterclockwise
to desired heating level. The burners
should light. Set control knob to any heat
level between HI and LO.
9. To leave pilot lit and shut off burners
only, turn control knob clockwise
to PILOT position.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
TO TURN OFF GAS
TO AppLIANCE
1. Turn control knob clockwise
to OFF
position.
2. Close equipment shutoff valve (see Figure
14, page 14).
THERMOSTAT CONTROL
OpERATION
Thermostat control knob can be set to any
comfort level between HI and LO. Thermo
-
stat will gradually modulate heat output and
flame height from higher to lower settings or
pilot, in order to maintain comfort level you
select. The ideal comfort setting will vary
by household depending upon amount of
space to be heated, output of central heating
system, etc.
Note: Selecting HI setting with control knob
will cause burner to remain fully on, without
modulating down in most cases.
MANUAL LIGHTING
pROCEDURE
1. Follow steps 1 through 5 under
Lighting
Instructions
,
column 1.
2. Depress control knob and light pilot with
match.
3. Keep control knob pressed in for 30 sec
-
onds after lighting pilot. After 30 seconds,
release control knob. Now follow step 8
under
Lighting Instructions
,
column 1.
