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Air Handler Hook-up Diagram
Heat P
ump
Comfort Control
Field wiring
Yellow
Green
White
Blue
B
W
G
Y
R
Red
O
Orange
Yellow
Blue
Black
(X2)
Red
Orange
Heat Pump
B - Blue
Y - Yellow
R - Red
O - Orange
W1 - White
Air Handler
Red
Blue
Yellow YI
Purple YO
Orange
Green
W2 Pink
W3 Brown
W1 White *
STEP 6 - Refrigerant Switch
Set the system refrigerant to either R-410A or R-22
using the Refrigerant Switch located on the Expansion
Valve Control board (EVC).
Factory default is R-410A.
Note: The power must be shut off and then re-
applied in order for the EVC to recognize the
change.
• * For multiple stages of electric heat, jumper W1, W2, and W3 together if comfort control has only one stage of heat
• YI and YO connections must be made as shown for proper operation, freeze protection, and internally mounted condensate overflow
circuits to work properly
• Internally mounted condensate switch is optional and must be ordered separately
• If a 3rd party condensate overflow switch is installed, it should be wired between Y of the thermostat and YI of the EEV control.
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