OPERATING YOUR UNIT
These units are equipped with an ignition device which automatically lights the burners. Do not try to light the burners by hand.
Before operating, smell around furnace area for gas. Be sure to smell near the unit base because some gas is heavier than air and will settle to the lowest point. See WHAT TO DO IF YOU SMELL GAS on page 1 if the odor of gas is present.
Use only your hand to slide the gas control switch; never use tools. If the switch will not move by hand, don’t try to repair it. Call a qualified service technician. Force or attempted repair may result in a fire or explosion.
Lighting Instructions
1.STOP! Read the previous safety information.
2.Set the thermostat to the lowest setting.
3.Turn off all electric power to the unit.
4.Remove the burner compartment access panel.
5.This appliance is equipped with an automatic ignition device. Do not try to light the burners by hand.
6.Turn the gas control knob, or slide the gas control switch, to “OFF” (see Figure 1).
Gas Valves
Gas
Control
Knob
Gas Control Switch
Figure 1
7.Wait 5 minutes to clear out any gas, then smell for gas (including at the bottom of the unit near the ground). If you smell gas, stop and follow the directions in WHAT TO DO IF YOU SMELL GAS on page 1. If you don’t smell gas, continue to next step.
8.Turn the gas control knob, or slide the gas control switch, to “ON”.
9.Replace the burner compartment access panel.
10.Turn on all electric power to the unit.
11.Set the thermostat to the desired setting.
12.If the unit will not operate, follow the instructions found below in To Turn Off Gas to Unit and call your service technician or gas supplier.
Operating Sequence
When the thermostat calls for heat, the vent motor will purge the system for 30 seconds (nominal). When the prepurge time has expired, the gas valve will open for direct ignition. When burners are lit, the flame sensor will sense flame and keep the gas valve open. If the flame sensor does not sense that a flame has been established, it will shut off the gas valve. The ignition system is designed to go through three trials for ignition. If flame still has not been established after the third trial, the system will go into lockout. After 1 hour, the system will try three more times.
If the system goes into lockout, it can be reset by turning your thermostat down or off for 10 seconds and then back to the desired point.
When the room thermostat is satisfied, the electrical circuit to the gas valve is opened and the burners are shut off.
Shutting Down the Unit
To shut down the unit, set the thermostat to the “OFF” position.
To Turn Off Gas to Unit
1.Set the thermostat to the lowest setting.
2.Turn off all electric power to the unit if service is to be performed.
3.Remove the burner compartment access panel.
4.Turn the gas control knob, or slide the gas control switch, to “OFF” (see Figure 1). Do not force.
5.Replace the burner compartment access panel.
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