Inspecting Heater

OPERATING HEATER

Continued

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.

THERMOSTAT CONTROL

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. 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 1 and 5. Selecting the 5 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 tem- perature (depending on housing construction, installation location, room size, open air tem- peratures, etc.). Frequent use of your heater will let you determine your own comfort levels.

MANUAL LIGHTING

PROCEDURE

1.Remove front panel (see Figure 8, page 7).

2.Follow steps 1 through 7 under Lighting Instructions, page 11.

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. Now follow step 9, under Lighting Instructions, page 11.

5.Replace front panel.

Check pilot ﬂame pattern and burner ﬂame pat- tern often.

PILOT FLAME PATTERN

Figure 18 shows a correct pilot ﬂame pattern. Figure 19 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 19

•turn heater off (see To Turn Off Gas to Appliance)

•see Troubleshooting, page 14

Thermocouple	Pilot Burner

Figure 18 - Correct Pilot Flame Pattern

Thermocouple	Pilot Burner

Figure 19 - Incorrect Pilot Flame Pattern
BURNER FLAME PATTERN
Figure 20, page 13, shows a correct burner ﬂame pat-
tern. Figure 21, page 13, shows an incorrect burner
ﬂame pattern. The incorrect burner ﬂame pattern
shows yellow tipping of the ﬂame. It also shows the
ﬂame higher than 1/2 the glass panel height.
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide.


NOTICE: Do not mistake orange
ﬂames with yellow tipping. Dirt
or other ﬁne particles enter the
heater and burn causing brief
patches of orange ﬂame.

If burner ﬂame pattern is incorrect, as shown in
Figure 21, page 13