Honeywell VisionPro TH8000 Series Operating Manual page 36

Installation Guide
Wiring
Wiring guide-conventional systems
Shaded areas below apply
Q.!lbl
to TH8320/TH8321.
1H/1C System (1 transformer)
Rc
3
Power [1]
R [R+Rc JOined by jumper]
W Heat relay
Y Compressor contactor
G
Fan relay
C 24VAC common [3]
S1 Optional outdoor/remote sensor
S2 Optional outdoor/remote sensor
Heat Only System
Rc
3
Power [1]
R [R+Rc JOined by jumper]
W Heat relay
C 24VAC common [3]
S1 Optional outdoor/remote sensor
S2 Optional outdoor/remote sensor
Heat Only System (Series 20)
Rc
3
[R+Rc joined by jumper]
R Senes 20 valve terminal "R" [1]
W Series 20 valve terminal "8"
Y Series 20 valve terminal "W"
C 24VAC common [3]
S1 Optional outdoor/remote sensor
S2 Optional outdoor/remote sensor
2H/2C System (1 transformer)
Y2
Cool relay 2
W2 Heat relay 2
Power.
[1]
tR+Rc joined by jumper]
w
Heatrelay
1
Y
.. Cool relaY 1
Fan relay
c
24VAC common [3]
S1 ... Qptionaloutdoor/remote sensor
S2 Optional outdoor/remote sensor
See [notes] below
1H/1C System (2 transformers)
Rc Power (cooling transformer) [1, 2]
R Power (heating transformer) [1, 2]
W Heat relay
Y Compressor contactor
G
Fan relay
C
24VAC common [3, 4]
S1 Optional outdoor/remote sensor
S2 Optional outdoor/remote sensor
Heat Only System
With
Fan
Power [1]
[R+Rc joined by jumper]
W Heat relay
G Fan relay
c
24VAC common [3]
S1
Optional outdoor/remote sensor
S2 Optional outdoor/remote sensor
Cool Only System
Rc
3
Power [11
R [R+Rc JOined by Jumper]
Y Compressor contactor
G
Fan relay
C 24VAC common [3]
S1 Optional outdoor/remote sensor
S2 Optional outdoor/remote sensor
2H/2C
System (2 transformers)
Y2 Cool relay 2
W2 Heat relay 2 .
Rc Power (cooling transformer) [1,
2]
R
Power (heating transformer) [1, 2]
W Heat relay 1
y C991 relay 1
G
Fan relay
c. .
24VAC common [3, 4]
S1 Optional outdoor/remote sensor
S2 Optional outdoor/remote sensor
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Remove jumper for 2-transformer systems.
[3] Optional 24VAC common connection.
[4] Common connection must come from cooling transformer.
4