WARNING
Danger of electrical shock, explosion and fire. Improper servicing could result in dangerous operation, serious inujry, death or property damage.
Unit Operation
FOR YOUR SAFETY READ BEFORE LIGHTING
BEFORE LIGHTING smell all around the furnace area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.
Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, do not try to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion.
This unit is equipped with an automatic spark ignition sys tem. There is no pilot. In case of a safety shutdown, move thermostat switch to OFF and return the thermostat switch to HEAT. Electro−mechanical thermostat is shown in figure 1. On logic units and units with electronic temper ature controls, shut main disconnect off and back on to re set ignition control.
Unit Operation − Continued
THERMOSTAT
HEAT | COOL |
5060 70 80
10 15 2025 30
FAN AUTO ON HEAT OFF COOL
FIGURE 1
A−Placing Unit In Heating Operation
WARNING
Danger of explosion and fire. Can cause injury or product or property damage. You must follow these instructions exactly.
1− If using electro est setting.
2− Turn off all electrical power to furnace.
3− This furnace is equipped with an ignition device which automatically lights burner. Do not try to light burner by hand.
4− Remove heat access panel.
5− Honeywell VR8205 − Turn knob on gas valve clock wise 
until it stops. Depress knob and turn clock wise 
to OFF.
White Rodgers 36E − Turn knob on gas valve 180° ei ther way to OFF.
6− Wait five minutes to clear out any gas. If you then smell gas, STOP! Immediately call your gas supplier from your neighbor’s phone. Follow the gas supplier’s instructions. If you don’t smell gas go to next step.
Gas Valve Operation (Figure 2)
7− Honeywell VR8205 − Turn knob on gas valve counter clockwise 
until it stops. Allow knob to pop up and continue counterclockwise to ON position.
White Rodgers 36E − Turn knob on valve 180° either way to ON.
8− Replace heat section access panel.
9− Turn on electrical power to unit. If using electro chanical thermostat, set to desired setting.
10− The combustion air inducer(s) will start. The burners will light within 40 seconds.
HONEYWELL VR8205 SERIES GAS VALVE | |
| ON |
| OFF |
GAS VALVE SHOWN IN OFF POSITION | |
WHITE RODGERS 36E GAS VALVE | |
| MANIFOLD |
| PRESSURE |
| ADJUSTMENT |
| SCREW |
| MANIFOLD |
NO | PRESSURE |
| OUTLET |
OFF |
|
FIGURE 2
11− If unit does not light first time (gas line not fully purged) it will attempt up to two more ignitions before locking out.
12− If lockout occurs, repeat steps 1 through 10.
13− If the furnace will not operate, follow the instructions To Turn Off Gas To Unit" and call your service techni cian or gas supplier.
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