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8. Turn control knob counterclockwise
to the desired heating level. The main
burner should light. Set control knob to
any heat level between 1 (LO) and 5 (HI).
Note: Please wait one minute after shut-
ting off heater to allow the control valve
to reset before starting again.
Ignitor Button
Figure 28 - Ignitor Button and Control
Knob Locations
Shutting Off Heater
Turn control knob clockwise
OFF position.
The thermostatic control used on this model
differs from standard thermostats. Standard
thermostats simply turn the burner on and off.
The thermostat used on this heater senses the
room temperature. At times the room may ex-
ceed the set temperature. If so, the burner will
shut off. The burner will cycle back on when
1. Follow steps 1 through 7 under Lighting
Instructions, page 20.
2. With control knob in PILOT position, strike
match, and hold near pilot. Press in control
knob; pilot should light.
200133-01A
OPERATION
Control Knob
TO TURN OFF GAS TO APPLIANCE
to the
THERMOSTATIC CONTROL OPERATION
MANUAL LIGHTING PROCEDURE
www.usaprocom.com
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.
Ignitor
Natural Gas
Electrode
Burner
Pilot Air
Inlet Hole
(Back of pilot
shown for clarity)
Figure 29 - Pilot
Shutting Off Burner Only (pilot
stays lit )
Turn control knob clockwise
PILOT position.
room temperature drops below the set tem-
perature. The control knob can be set to any
comfort level between HIGH (5) and LOW (1).
Note: The thermostat sensing bulb measures
the temperature depending on housing con-
struction.
3. Keep control knob pressed in for 30 sec-
onds after lighting pilot. After 30 seconds,
release control knob.
4. Make sure the heater screen is in place
before operating heater.
Thermocouple
Propane/LP
Gas Burner
Pilot Air Inlet Hole
to the
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