Operating Modes; Setting The Time And Day Of The Week - Daikin McQuay 668811101 Operation & Application Manual

Programmable electronic thermostat

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There are six possible operating modes for the McQuay 668811101 thermostat. Off, Cool, Heat, and Cool & Heat

modes are accessed by pressing the Mode button. Program mode is accessed by pressing the Prog button. Continuous

fan mode is accessed by setting the auto/on switch to ON.

OFF Mode

• In this mode, the thermostat will not turn on the heat pump.

Continuous Fan Mode

• The indoor fan can be turned on manually in every operating mode by sliding the auto/on switch to ON.

Cool Mode

• In this mode, the thermostat controls the cooling system

Note: There is a four minute delay for your compressor to restart after it has turned off.

Heat Mode

• In this mode, the thermostat controls the heating system

Note: For heat pumps, there is a four minute delay for your compressor to restart after

it has turned off.

Cool and Heat Mode (Auto Changeover)

the cooling and heating systems, automatically changing over from one to the other as

needed.

Program Mode

– In this mode, the program function is on (PROG displays), and the

thermostat will automatically be controlled by the set program schedule. Program mode can

function with heat mode, cool mode or heat & cool mode. The program schedule can be

overridden by changing the set temperature (

schedule will automatically be resumed. To manually return to the program schedule, press

the PROG button twice.

The time and day of the week must be set for your program schedule to operate correctly.

1. Press the MODE button until you are in the OFF mode.

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Operating Modes

– In this mode, the thermostat controls

button). After 2 hours, the program

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