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117001-01B
14
INSPECTING HEATER
Check pilot flame pattern and burner flame pat
-
tern often.
PILOT FLAME PATTERN
Figure 20 shows a correct pilot flame pattern.
Figure 21 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 21
• turn heater off (see
To Turn Off Gas to Appli-
ance,
page 13)
• see
Troubleshooting
, page 16
OPERATING HEATER
Continued
BURNER FLAME PATTERN
Figure 22, page 15, shows a correct burner flame
pattern. Figure 23, page 15, shows an incorrect
burner flame pattern. The incorrect burner flame pat
-
tern 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 car-
bon monoxide. If burner flame
pattern shows yellow tipping,
proceed with the following in
-
structions.
NOTICE: Do not mistake orange
flames with yellow tipping. Dust
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 23, page 15,
• turn heater off (see
To Turn Off Gas to Appli-
ance,
page 13)
• see
Troubleshooting
, page 16
Thermocouple
Pilot Burner
Pilot Burner
Thermocouple
Blue Flame
Yellow Flame
Figure 20 - Correct Pilot Flame Pattern
Figure 21 - Incorrect Pilot Flame Pattern
Note:
The pilot flame on natural gas units will
have a slight curve, but flame should be blue and
have no yellow or orange color.
THERMOSTAT CONTROL
OPERATION
The thermostatic control used on these models
differs from standard thermostats. Standard ther
-
mostats simply turn on and off the burner. The
thermostat used on this heater senses the room
temperature. 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. This
adjusts the amount of gas flow to the burner that
increases or decreases the burner flame height.
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, installation
location, room size, open air temperatures, etc.)
Frequent use of your heater will let you determine
your own comfort levels.
MANUAL LIGHTING
PROCEDURE
1. Remove front panel (see Figure 10, page 9).
2. Follow steps 1 through 7 under
Lighting
Instructions
, page 13.
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
Light-
ing Instructions
, page 13.
5. Replace front panel.
