SYSTEM SWITCH FUNCTIONS
Switch 1 - Equipment Type
Switch 1 sets the equipment type. For conventional
heat/cool equipment, set the switch to the OFF
position (factory default). For heat pump equipment set
the switch to the ON position.
Switch 2 - Fan or
When Switch 1 is OFF
Reversing Valve
For gas heat, set the switch to the OFF position
(factory default). For electric heat, set the switch to the
ON position.
When Switch 1 is ON
For ‘O’ reversing valve, set the switch to the OFF
position. (factory default) For ‘B’ reversing valve, set
the switch to the ON position.
Switch 3 - Equipment Stages
Switch 3 sets the number of equipment stages.
OFF = 1 heat / 1 cool gas / electric or 2 heat / 1 cool
heat pump or dual fuel.
ON = 2 heat / 2 cool gas / electric or 3 heat / 2 cool
heat pump or dual fuel.
Switch 4 - Dual Fuel Mode
For conventional heat pump equipment, leave
switch 4 in the OFF position (factory default). For
dual fuel equipment, set switch 4 to the ON position.
10