OPERATING YOUR HEATER

THERMOSTAT MODELS

LIGHTING

INSTRUCTIONS

1. STOP! Read the safety information on the side of heater.

2.Check that gas supply to heater is on.

3.Push in gas control knob slightly and turn clockwise to the OFF position.

NOTE: knob cannot be turned from “PILOT” to “OFF” unless knob is pushed in slightly. Do not use force.

4.Wait five (5) minutes to clear out any air. Then smell for gas, including near the floor. If you smell gas, STOP!

Follow “B” in the safety information on the side of the heater. If you do not smell gas, go to the next step.

5.Push in gas control knob

slightly and turn

counterclockwise to “PILOT/IGN” and depress for five(5) seconds

NOTE: You may be running this heater for the first time after hooking up to gas supply. If so, the control knob should be depressed for about thirty (30) seconds. This will allow air to bleed from the gas system.

7.Keep control knob pressed in for thirty (30) seconds after

lighting pilot. After 30 seconds, release control knob. If control knob does not pop up when released, contact a qualified service person or gas supplier for repairs.

NOTE: If pilot goes out, repeat steps 3 through 7. 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 HI and LO.

CAUTION: Do not try to adjust heating levels by using the equipment shutoff valve.

Figure 17 - Control Knob In The OFF Position

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 tem- perature drops below the set temperature. The control knob can be set to any heat level between HI and LO. Selecting the HI 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 al- ways 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 y o u r o w n c o m f o r t l e v e l s .

TO TURN OFF

GAS TO APPLIANCE

Shutting Off Heater

1.Turn control knob clockwise

to the 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 to the PILOT/IGN position.

MANUAL LIGHTING

6.With control knob pressed in, push down and release the ignitor button. This will light pilot. If needed, keep pressing ignitor button until pilot lights.

NOTE: If pilot does not stay lit, refer to Troubleshooting, pages 14 through 16. Also contact a qualified service person or gas supplier for repairs. Until repairs are made, light pilot with match. To light pilot with match, see Manual Lighting Procedure.

Figure 18 - Pilot

THERMOSTAT

CONTROL OPERATION

The thermostatic control used on these models differs from standard thermostats. Standard thermostats 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.

PROCEDURE

1.Remove lower front panel (see Figure 7 page 7).

2.Follow steps 1 through 5 under Lighting Instructions.

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. Follow step 8 under Lighting Instructions.

5.Replace lower front panel.

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Procom ML200HBA, ML300HBA, ML200TBA, ML300TBA installation manual Operating Your Heater

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