OPERATING FIREPLACE
Continued
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
Turn control knob clockwise 
to the OFF position.
Shutting Off Burner Only (pilot stays lit)
Turn control knob clockwise 
to the PILOT position.
THERMOSTAT CONTROL
OPERATION
The thermostat control knob can be set to any comfort level between HI and LO. The ther- mostat 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 burner to remain fully on, without modulating down in most cases.
MANUAL LIGHTING
PROCEDURE
1.Follow steps 1 through 6 under Lighting Instructions, page 19.
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 under Lighting Instructions, page 19.
INSPECTING BURNERS
Check pilot flame pattern and burner flame pat- terns often.
PILOT FLAME PATTERN
Figure 31 shows a correct pilot flame pattern. Figure 32 shows an incorrect pilot flame pattern. The incorrect pilot flame is not properly heating the thermocouple. When the thermocouple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown in Figure 32
•turn heater off (see To Turn Off Gas to Appli- ance, column 1)
•see Troubleshooting, page 23
Note: The correct pilot flame on natural gas units will have a slight curve, but flame should be blue and have no yellow or orange color.
Pilot Burner | Thermocouple |
|
Figure 31 - Correct Pilot Flame Pattern
(propane/LP ignitor shown)
Pilot Burner
Thermocouple
Figure 32 - Incorrect Pilot Flame Pattern
(propane/LP ignitor shown)
20 | www.desatech.com |