www.desatech.com
113681-01A
16
OF
F
PI
LO
T
O
F
F
P
IL
O
T
O
F
F
P
IL
O
T
OPERATING HEATER
Continued
7. Keep thermostat 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 inter-
lock system. Wait one minute before light-
ing pilot again.
8. Turn thermostat control knob counter-
clockwise
C-clockwise
to the desired heating
level. The main burner should light. Set
control knob to any heat level between 1
and 5 (see Figure 23).
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
Figure 21 - Control Knob In The OFF
Position (Piezo Ignitor Shown)
Figure 22 - Pilot
(Actual Pilot May Vary from Illustration)
Figure 23 - Burner Patterns
Control
Knob
3 Plaque
5 Plaque
Ignitor Electrode
Pilot Burner
Thermocouple
Control Knob
Ignitor Button
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turn thermostat control knob clockwise
Clockwise
to the OFF position.
2. Unplug optional blower if service is to be
performed.
Shutting Off Burner Only (pilot stays lit)
Turn thermostat control knob clockwise
Clockwise
to the PILOT/IGN position.
THERMOSTAT
OPERATION
The thermostatic control used on these models
differs from standard thermostats. Standard
thermostats simply turn on and off the burner.
The thermostat used on this heater senses the
room temperature. At times the room may ex-
ceed the set temperature. If so, the burner will
shut off. The burner will cycle back on when
room temperature drops below the set tempera-
ture. The control knob can be set to any com-
fort level between 1 and 5. All plaques will turn
off and on.
Note:
The thermostat sensing bulb measures
the temperature of air near the heater cabinet.
This may not always agree with room tempera-
ture (depending on housing construction, instal-
lation location, room size, open air tempera-
tures, etc.) Frequent use of your heater will let
you determine your own comfort levels.
MANUAL LIGHTING
PROCEDURE
1. Remove front panel (see Figure 7, page 9).
2. Follow steps 1 through 5 under
Lighting In-
structions
, page 15.
3. With thermostat control knob pressed in,
strike match. Hold match to pilot until pi-
lot lights.
4. Keep thermostat control knob pressed in
for 30 seconds after lighting pilot. After 30
seconds, release control knob.
5. Replace front panel.
6. Follow step 8 under
Lighting Instructions
,
page 15.
2 Plaque
ON
ON
ON
OFF
OFF
OFF
