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Issue 1132
Thermostat
Install the room thermostat according to the instructions
provided with the thermostat. See Figure 22 for thermostat
designations. If the furnace is being matched with a heat
pump, refer to the FM21 installation instruction or appropriate
dual fuel thermostat instructions.
Indoor Blower Speeds
1. When the thermostat is set to “FAN ON,” the indoor
blower will run continuously on the fan speed when
there is no cooling or heating demand.
2. When the unit is running in the heating mode, the indoor
blower will run on the heating speed.
3. When there is a cooling demand, the indoor blower will
run on the cooling speed.
Condensing Unit Thermostat Designations
(Refer to Specific Thermostat and Outdoor Unit.)
* Note:
“R” Required on some outdoor units.
Figure 22
