Inspecting Heater - Desa REM10PT Owner's Operation And Installation Manual

oPeRaTInG HeaTeR
Continued
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise
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
position.
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. 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 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 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 Light-
ing Instructions, page 11.
5. Replace front panel.
1
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.
to the
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
to the PILOT
Figure 19
• turn heater off (see To Turn Off Gas to Appliance)
• see Troubleshooting, page 14
Thermocouple
Figure 18 - Correct Pilot Flame Pattern
Thermocouple
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.
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
• turn heater off (see To Turn Off Gas to Appliance)
• see Troubleshooting, page 14
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InsPeCTInG HeaTeR

WARNING: If yellow tipping
Pilot Burner
Pilot Burner
110373-01F