RedLINK
Installation Guide (EIM)
TM
System-specific wiring guides
Conventional systems
1H/1C System
(1 transformer)
C
24VAC common
R
Power [1]
Rc
[R+Rc+Rh joined by jumper]
Rh
[R+Rc+Rh joined by jumper]
W
Heat relay
Y
Compressor contactor
G
Fan relay
Heat-only System
C
24VAC common
R
Power [1]
Rc
[R+Rc+Rh joined by jumper]
Rh
[R+Rc+Rh joined by jumper]
W
Heat relay
Heat-only System
C
24VAC common
R
Series 20 valve terminal "R" [1]
Rc
[R+Rc+Rh joined by jumper]
Rh
[R+Rc+Rh joined by jumper]
W
Series 20 valve terminal "B"
Y
Series 20 valve terminal "W"
Heat-only System
(normally open zone valve) [3]
C
24VAC common
R
Power [1]
Rc
[R+Rc+Rh joined by jumper]
Rh
[R+Rc+Rh joined by jumper]
Y
Normally open zone valve
Heat Only System With Fan
C
24VAC common
R
Power [1]
Rc
[R+Rc+Rh joined by jumper]
Rh
[R+Rc+Rh joined by jumper]
W
Heat relay
G
Fan relay
69-2091EFS—09
[3]
(Series 20) [3]
[4]
See [notes] on next page.
Cool Only System
C
24VAC common
R
Power [1]
Rc
[R+Rc+Rh joined by jumper]
Rh
[R+Rc+Rh joined by jumper]
Y
Compressor contactor
G
Fan relay
1H/1C System (2 transformers)
C
24VAC common
R
Power [1]
Rc
Power (cooling) [1, 2]
Rh
Power (heating) [1, 2]
W
Heat relay
Y
Compressor contactor
G
Fan relay
2H/2C System
C
24VAC common
R
Power [1]
Rc
[R+Rc+Rh joined by jumper]
Rh
[R+Rc+Rh joined by jumper]
W
Heat relay (stage 1)
W2
Heat relay (stage 2)
Y
Compressor contactor (stage 1)
Y2
Compressor contactor (stage 2)
G
Fan relay
2H/2C System
C
24VAC common
R
Power [1]
Rc
Power (cooling) [1, 2]
Rh
Power (heating) [1, 2]
W
Heat relay (stage 1)
W2
Heat relay (stage 2)
Y
Compressor contactor (stage 1)
Y2
Compressor contactor (stage 2)
G
Fan relay
16
[5]
(1 transformer) [6]
(2 transformers) [6]