035-15241-003 Rev. A (201)
20
Unitary Products Group
6.
If the burners fail to light within 6-8 seconds after the gas
valve opens, the gas valve will close and the ignitor will
be turned off. After a short pause, the system will recycle
and try again for ignition. If the burners fail to light after
three tries, the ignition system will lock out. The system
will remain in lockout mode until one hour has passed, or
until the room thermostat is cycled off, then back on. The
furnace will then try for ignition again.
7.
The lapsed time from the moment the room thermostat
closes to when the burners light may be 30-40 seconds.
This delay is caused by the time required for the vent
blower to come to full speed, the time required for the
ignitor to heat up and the time required for fresh air to be
brought into the heat exchanger.
8.
About thirty seconds after the burners have lighted, the
fan switch will close and the furnace air circulation
blower will run.
9.
When room thermostat is satisfied the circuit to the fur-
nace control board is broken. The circuit to the gas valve
is broken and the burners are extinguished. The vent
blower will continue to run for a few seconds. Then the
furnace control board will keep the circulating blower
running for a period of time to allow additional heat to be
drawn from the heat exchanger.
FURNACE OPERATION
FOR YOUR SAFETY READ BEFORE OPERATING
1.
This appliance does not have a pilot. It is equipped with
an ignition device, which automatically lights the burners.
DO NOT try to light the burners by hand.
2.
Before operating, smell all around the appliance area for
gas. Be sure to smell next to the floor because some gas
is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS:
•
Don't try to light any appliance.
•
Don't touch any electric switch; don't use any phone in
your building.
•
Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
•
If you can not reach your gas supplier, call the fire
department.
3.
USE ONLY YOUR HAND TO MOVE THE GAS CON-
TROL LEVER OR SWITCH. NEVER USE TOOLS. IF
THE LEVER OR SWITCH WILL NOT MOVE BY HAND,
DON'T TRY TO REPAIR IT, CALL A QUALIFIED SER-
VICE TECHNICIAN. FORCE OR ATTEMPTED REPAIR
MAY RESULT IN A FIRE OR EXPLOSION.
4.
DO NOT USE THIS APPLIANCE IF ANY PART HAS
BEEN UNDER WATER. IMMEDIATELY CALL A QUALI-
FIED SERVICE TECHNICIAN TO INSPECT THE
APPLIANCE AND TO REPLACE ANY PART OF THE
CONTROL SYSTEM AND ANY GAS CONTROL
WHICH HAS BEEN UNDER WATER.
OPERATING INSTRUCTIONS
1.
STOP! Read the safety information listed above.
2.
Set the thermostat to the lowest setting, or OFF.
3.
Turn off all electric power to the furnace.
4.
This appliance does not have a pilot. It is equipped with
an ignition device, which automatically lights the burners.
DO NOT try to light the burners by hand.
5.
Remove front door panel.
6.
Move gas valve control lever or switch to "OFF". See
Figure 14.
7.
Wait five (5) minutes to clear out any gas. Then smell for
gas, including near the floor. If you smell gas, STOP! Fol-
low "2" in the safety information above. If you don't smell
gas, go to the next step.
8.
Move gas control lever or switch to "ON".
9.
Replace front door panel.
10. Turn on all electric power to the furnace.
11. Set thermostat to desired setting.
GAS SHUTOFF
This furnace is equipped with a gas shutoff lever or switch on
the gas valve, which can be used to prevent gas from flowing
to the furnace. Figure 14 shows the location of the shutoff
lever or switch. To turn off gas to the furnace, move the lever
or switch to the "OFF" position.
The furnace installation should also have a manual shutoff
valve in the gas piping to the furnace, similar to what is
shown in Figure 15. To turn off the gas to the furnace, use a
wrench and turn the switch or lever so that it is pointing 90
degrees from the gas pipe, as shown in Figure 15.
If you do not follow these instructions exactly, a
fire or explosion may result causing property
damage, personal injury or loss of life.
FIGURE 14: WHITE RODGERS GAS VALVE
GAS CONTROL
SWITCH
O
F
F
ON
1
2
3
SUPPLY
PRESSURE
TAP
MANIFOLD
PRESSURE TAP
MANIFOLD PRESSURE
ADJUSTMENT
