Wiring Guide — Heat Pump Systems - Honeywell 9000 Installation Manual

Wiring
Wiring guide — heat pump 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 Heat
Pump System
Rc
Power [1]
R
[R+Rc joined by jumper loop]
Y Compressor contactor
C 24VAC common
O/B Changeover valve
G Fan relay
2H/1C Heat
Pump System
Rc Power [1]
R [R+Rc joined by jumper loop]
Y Compressor contactor
C
24VAC common
O/B
Changeover valve
G
Fan relay
Aux/E Auxiliary/Emergency heat relay
L
Sends output when set to Em. Heat
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] In Setup, set changeover valve to O or B.
C K Rc R Y G W2 Y2
O/B
[7]
C K Rc R Y G Y2
Aux/E
O/B
[2]
C K Rc R W Y
3H/2C Heat
Pump System
Rc
Power
L
MCR34828
R
[R+Rc joined by jumper loop]
Y Compressor contactor (stage 1)
C 24VAC common
O/B Changeover valve
G Fan relay
Aux/E Auxiliary/Emergency heat relay
Y2
Compressor contactor (stage 2)
L
Sends output when set to Em. Heat
L
MCR34829
See [notes]
Jumper Loop
G W2 Y2 L
MCR34821
5
C K Rc R Y
O/B
[1]
[2]
below
G Y2 L
Aux/E
MCR34830
69-2815EFS—01