OWNER’S MANUAL
OPERATING
HEATER
Continued
THERMOSTAT CONTROL
OPERATION
The thermostatic control used on these models differs from standard thermo- stats. Standard thermostats simply turn on and off the burner. The thermostat used on this heater senses the room tem- perature. 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.
Note: The thermostat sensing bulb mea- sures the temperature of air near the heater cabinet. This may not always agree with room temperature (depending on housing construction, installation loca- tion, room size, open air temperatures, etc.). Frequent use of your heater will let you determine your own comfort levels.
INSPECTING
BURNER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 18 shows a correct pilot flame pat- tern. 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.
Pilot Burner
Thermocouple
Figure 18 - Correct Pilot Flame Pattern
BURNER FLAME PATTERN
Figure 20 shows a correct burner flame pattern. Figure 21 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. If burner flame pat- tern shows yellow tipping, follow instructions at bottom of this page.
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.
1/2
1/2 G Glass
Height
Correct Flame Pattern
At High Position
MANUAL LIGHTING
PROCEDURE
1. | Remove front panel (see Figure 7, |
| page 8). |
2. | Follow steps 1 through 5 under Light- |
| ing Instructions, page 12. |
3. | With control knob pressed in, strike |
| match. Hold match to pilot until pi- |
Thermocouple
Pilot Burner
Figure 20 - Correct Burner Flame Pattern
Yellow Tipping
1/2
Glass
Height
Incorrect Flame Pattern
| lot lights. |
4. | Keep control knob pressed in for 30 |
| seconds after lighting pilot. After 30 |
| seconds, release control knob. |
5. | Replace front panel. |
Figure 19 - Incorrect Pilot Flame Pattern
If pilot flame pattern is incorrect, as shown in Figure 19.
•turn heater off (see To Turn Off Gas to Appliance, page 12).
•see Troubleshooting, pages 14 through 16.
At High Position
Figure 21 - Incorrect Burner Flame Pattern
If burner flame pattern is incorrect, as shown in Figure 21
•turn heater off (see To Turn Off Gas to Appliance, page 12)
•see Troubleshooting, pages 14 through 16
104190 | 13 |