4
Figure 1. Typical Thermostat
explosion, personal injury, carbon monoxide poisoning, or
property damage.
OPERATING INSTRUCTIONS
Cooling Operation— 2 Stage
1.
Set the thermostat system switch to COOL and the
thermostat fan switch to AUTO. (See Figure 1)
2.
Set the thermostat temperature selector to the de-
sired temperature level. The outdoor fans, compres-
sors, and indoor blower will all cycle on and off to
maintain the indoor temperature at the desired cooling
level.
Heating Operation — 2 Stage
1.
Set the thermostat system switch to HEAT and the
thermostat fan switch to AUTO. (See Figure 1)
2.
Set the thermostat temperature selector to the de-
sired temperature level. The indoor blower and gas
heat module will cycle on and off to maintain the
indoor temperature at the desired heating level.
NOTE: There is a factory set 3 minute time delay
between Stage 1 and Stage 2 heat when Stage 2
heating is required.
!
WARNING:
Should overheating occur, or the gas supply fail
to shut off, shut off the manual gas valve to the
unit before shutting off the electrical supply.
NOTE: This unit is equipped with a manual-reset flame
roll-out limit switch. This switch acts to verify that the
burner flame is being drawn into the heat exchanger tubes.
If the flame is not being drawn into the tubes, the flame roll-
out switch will open within several seconds. When this
switch opens, the gas valve will de-energize to stop the
flow of gas. The combustion inducer will stay energized
and continue to operate until the thermostat is satisfied or
the switch is closed. Do not reset the flame roll-out switch
before identifying and correcting the fault condition that
caused the switch to open. If the switch will not reset or
continues to open, immediately contact a qualified
serviceman to identify and repair the problem.
System Shutdown
—
Set the thermostat system
switch to OFF and the thermostat fan switch to AUTO.
(See Figure 1)
The system will not operate, regardless of the thermostat
temperature selector(s) setting.
