22
OPERATING HEATER
Thermostat Control Operation
Manual Lighting Procedurew
INSPECTING BURNERS
Pilot Flame Pattern
Burner Primary Air Holes
Main Burner
OPERATING HEATER
Continued
THERMOSTAT
CONTROL OPERATION
(Thermostat-Controlled Models Only)
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
1.Follow steps 1 through 5 under Lighting Instructions, page 21.
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 21.
INSPECTING BURNERS
Check pilot flame pattern and burner flame patterns often.
PILOT FLAME PATTERN
Figure 43 shows a correct pilot flame pattern. Figure 44 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple. This will cause the thermocouple to cool. When the thermocouple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown in Figure 44
•turn heater off (see To Turn Off Gas to Appliance, page 20 [manu-
•see Troubleshooting, pages 24 through 26
Pilot Burner | Pilot Burner |
|
Thermocouple | Thermocouple |
Figure 43 - Correct Pilot | Figure 44 - Incorrect Pilot |
Flame Pattern | Flame Pattern |
BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the holes in the fitting at the entrance to the burner. These holes may become blocked with dust, lint, or pet hair. Periodically inspect these holes for any blockage and clean as necessary. Blocked air holes will create soot.
MAIN BURNER
Periodically inspect all burner flame holes with the heater running. All slotted burner flame holes should be open with yellow flame present. All round burner flame holes should be open with a small blue flame present. Some burner flame holes may become blocked by debris or rust, with no flame present. If so, turn off heater and let cool, Remove blockage. Blocked burner flame holes will create soot.
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