Thermostat Installation
Wire Color
Black
Red
Yellow
White
Orange
Green
Purple
NOTE: If the PTAC unit has only one (1) fan speed,
connect both fan control wires – Green and Purple –
to the fan terminal (G).
49-5000637 Rev. 0
Wiring Table – 24V AC
Terminal Letter
C
R
Y
W
O or B
GH
GL
Terminal Connection
Common
24V
Compressor
Heat
Reversing Valve
Fan High
Fan Low
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