Wiring Instructions - Honeywell 9000 Serie Guide D'installation

Wiring
Wiring guide — conventional systems

Wiring Instructions

1. This thermostat requires a 24Vac common to power the thermostat. The K terminal is available for
Wiresaver module (THP9045A1023).
2. Straighten the wire. Using a pen tip to hold down the terminal, gently slide the wire into terminal hole.
Note: Terminal hole will only accept one wire.
1H/1C System
(1 transformer)
Rc
Power [1]
R
[R+Rc joined by jumper loop]
Y
Compressor contactor
C
24VAC common
W
Heat relay
G
Fan relay
Heat-only System
Rc Power [1]
R
[R+Rc joined by jumper loop]
C
24VAC common
W
Heat relay
1H/1C System
(2 transformers)
Rc
Power (cooling transformer)
R
Power (heating transformer)
Y
Compressor contactor
C
24VAC common
W
Heat relay
G
Fan relay
Heat-only System
with Fan
Rc
Power [1]
R
[R+Rc joined by jumper loop]
C
24VAC common
W
Heat relay
G
Fan relay
NOTES
Wire specifications:
Use 18- to 22-gauge thermostat wire.
Shielded cable is not required.
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Remove jumper loop for 2-transformer
systems.
[3] Common connection must come from cooling transformer.
69-2815EFS—05
C K Rc R W
Y G W2 Y2
C K Rc R W Y G W2 Y2
C K Rc R W Y G W2 Y2
[1, 2]
[1, 2]
[3]
C K Rc R W Y G W2 Y2
C K Rc R W Y
Cool-only System
Rc Power
L
MCR34821
R [R+Rc joined by jumper loop]
Y Compressor contactor
C 24VAC common
G Fan relay
2H/2C System
(1 transformer)
Rc Power
L
R [R+Rc joined by jumper loop]
MCR34822
Y Compressor contactor (stage 1)
C 24VAC common
W Heat relay (stage 1)
G Fan relay
W2
Heat relay (stage 2)
Y2
Compressor contactor (stage 2)
L
M34823
2H/2C System
(2 transformers)
Rc
Power (cooling transformer)
R
Power (heating transformer)
Y
Compressor contactor (stage 1)
C
24VAC common
W
Heat relay (stage 1)
G
Fan relay
W2
Heat relay (stage 2)
L
Y2
MCR34824
Compressor contactor (stage 2)
See [notes]
Jumper Loop
G W2 Y2 L
MCR34821
4
C K Rc R W Y
[1]
C K Rc R W Y
[1]
C K Rc R W Y
[1, 2]
[1, 2]
[3]
below
G W2 Y2 L
MCR34825
G W2 Y2 L
MCR34826
G W2 Y2 L
M34827