Install Instructions

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C
Upgrading to a Two-Stage Air Conditioner (Grounded Commons)
D
Upgrading to a Two-Stage Air Conditioner (Two Transformers)
Second
Stage
First
Stage
Sender
Purple
Black
Green (Not Used)
Red (Not Used)
Red
Yellow
Green (Not Used)
Red (Not Used)
Red (Not Used)
White
Purple
Yellow
White
Condenser
Cable
Air Conditioner
Y1
R C
Control Board
Y2
Indoor Unit
W
C
R
24V TransformerFan Heat
GY1Y2
External Transformer
24V Transformer
Receiver
Model 3000
W
R
Thermostat
Y2
G
Y1
Thermostat
Cable
Note: Unused wires should be taped back and electrically
isolated from other wires.
Note: If the indoor unit does not have ‘Y1’ or ‘Y2’ terminals, the
Sender should be connected directly to the thermostat cable
instead.
Note: An external 24VAC transformer will have to be installed.
Note: For this system a Model 1000 can be used.
Second
Stage
First
Stage
Sender
Purple
Black
Green (Not Used)
Red (Not Used)
Red
Yellow
Green (Not Used)
Red (Not Used)
Red (Not Used)
White
Purple
Yellow
White
Condenser
Cable
Note: Unused wires should be taped back and electrically
isolated from other wires.
Note: If the indoor unit does not have ‘Y1’ or ‘Y2’ terminals, the
Sender should be connected directly to the thermostat cable
instead.
Note: For this system a Model 1000 can be used.
Air Conditioner
Y1
R C
Control Board
Y2
Indoor Unit
W
C
R
24V TransformerFan Heat
GY1Y2
Receiver
Model 3000
W
R
Thermostat
Y2
G
Y1
Thermostat
Cable