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19
200299-01D
OPERATION
THERMOSTAT CONTROL OPERATION
The thermostatic control used on this model
differs from standard thermostats. You set
standard thermostats to a specific tempera-
ture such as 72°. 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 comfort level between HIGH
(5) and LOW (1).
Note: The thermostat sensing bulb reacts
to the temperature depending on housing
construction.
TO TURN OFF GAS TO APPLIANCE
Shutting Off Heater
Turn control knob clockwise
to the
OFF position.
Shutting Off Burner Only
(pilot stays lit)
Turn control knob clockwise
to the
PILOT position.
MANUAL LIGHTING PROCEDURE
1. Remove front panel.
2. Follow steps 2 through 5 under
Lighting
Instructions
, page 18.
3. With control knob pressed in, strike match.
Hold match to pilot until pilot lights.
Note: If pilot goes out, repeat steps 2
through 6. This heater has a safety inter-
lock system. Wait one (1) minute before
lighting pilot again.
8. Turn control knob counterclockwise
to desired heating level. The main burner
should light. Set control knob to any heat
level between 1 and 5.
Figure 22 - Pilot
Pilot Air
Inlet Hole
Natural
Gas
Burner
Propane
Gas Burner
Thermocouple
Pilot Air
Inlet Hole
Ignitor
Electrode
4. Keep control knob pressed in for 30 sec-
onds after lighting pilot. After 30 seconds,
release control knob. Follow step 8 under
Lighting Instructions
, page 18.
5. Replace front panel.
Figure 23 - Burner Patterns
OFF
Control Knob
MG1TIR
MG2TIR
MG2TIR-BB
MG3TIR
MG3TIR-BB
Burners on HIGH
Burners OFF
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
WARNING: If input gas
type is NG, make sure NG pilot
burner ignites. If input gas type
is LP, make sure LP pilot burner
ignites.