8 18-HD64D1-1
Red
Brown
Blue
Red
Brown
Blue
B
D
R
24V Single Stage Cooling
B
D
R
W1
W2
W3
G
Y2
B
O
BK
D
Y1
R
W1
W2
W3
G
Y2
B
O
BK
D
Y1
R
Yellow
Yellow
Blue
Blue
Brown
Brown
Blue
Blue
Thermostat
Relay Panel
Red
Brown
Blue
B
D
R
BDR
Indoor Unit
Communicating Indoor Unit
Communicating
Outdoor Unit
Communicating System
Communicating Indoor with Non-Communicating Outdoor
24V System
24V Outdoor Unit
Communicating Indoor Unit
Relay Panel
*See Relay Panel
Installer’s Guide
for specific wiring
instructions.
Thermostat
Thermostat
Field Wiring
8