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110373-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
10
OPERATING HEATER
Continued
OPERATING HEATER
Lighting Instructions
To Turn Off Gas To Appliance
Thermostat Control Operation
Manual Lighting Procedure
CAUTION: Do not try to adjust heating levels by
using the equipment shutoff valve.
Figure 16 - Control Knob In The OFF Position
P
IL
O
T
LO
O
FF
HI
IGNITOR
Ignitor Button
Control Knob
Figure 17 - Pilot
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise to the OFF position.
2. Turn off all electric power to the appliance if service is to
be performed.
Shutting Off Burner Only (pilot stays lit)
Turn control knob clockwise to the PILOT position.
1. Remove front panel (see Figure 8, page 5).
2. Follow steps 1 through 5 under Lighting Instructions, page 9.
3. With control knob pressed in, strike match. Hold match to
pilot until pilot lights.
4. Keep control knob pressed in for 30 seconds after lighting
pilot. After 30 seconds, release control knob. Follow step 8
under Lighting Instructions.
5. Replace front panel.
THERMOSTAT CONTROL
OPERATION
The thermostatic control used on these models differs from stan-
dard thermostats. Standard thermostats simply turn on and off the
burner. The thermostat used on this heater senses the room
temperature. The thermostat adjusts the amount of gas flow to the
burner. This increases or decreases the burner flame height. At
times the room may exceed the set temperature. If so, the burner
will shut off. The burner will cycle back on when room temperature
drops below the set temperature. The control knob can be set to any
heat level between HI and LO. Selecting the HI setting will cause the
burner to remain fully on without modulating down in most cases.
Note:
The thermostat sensing bulb measures the temperature
of air near the heater cabinet. This may not always agree with
room temperature (depending on housing construction, instal-
lation location, room size, open air temperatures, etc.). Fre-
quent use of your heater will let you determine your own
comfort levels.
MANUAL LIGHTING
PROCEDURE
Ignitor Electrode
Pilot Burner
Thermocouple
6. With control knob pressed in, push down and release igni-
tor button. This will light pilot. The pilot is attached to the
front of burner. The pilot can be seen through the glass panel.
If needed, keep pressing ignitor button until pilot lights.
Note:
If pilot does not stay lit, refer to Troubleshooting,
pages 13 through 15. Also contact a qualified service per-
son 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 seconds after lighting
pilot. After 30 seconds, release control knob.
• If control knob does not pop up when released, contact a
qualified service person or gas supplier for repairs.
Note:
If pilot goes out, repeat steps 3 through 7. This heater
has a safety interlock system. Wait one (1) minute before
lighting pilot again.
8. Turn control knob counterclockwise to desired
heating level. The main burner should light. Set control
knob to any heat level between HI and LO.