TH8320ZW1000

569-2486—03

1H/1C Heat Pump (no auxiliary h eat)

Rc Power [1]
R [R+Rc joined by jum per]
O/B Changeover valve [5]
Y Compressor relay
G Fan relay
C 24VACcommon[3]
K OptionalTHP9045W iringModule
Terminal [9]

2H/1C Heat Pump (with auxil iary heat)

L Equipment moni tor [6, 7]
E Emergency heat relay [ 8]
Aux Auxiliary heat relay ( Heat 2) [8]
Rc Power [1]
R [R+Rc joined by jum per]
O/B Changeover valve [5]
Y Compressor relay
G Fan relay
C 24VACcommon[3]
K OptionalTHP9045W iringModule
Terminal [9]

2H/2C Heat Pump (no auxi liary heat)

Y2 Compressor 2 relay
Rc Power [1]
R [R+Rc joined by jum per]
O/B Changeover valve [5]
Y Compressor 1 relay
G Fan relay
C 24VACcommon[3]
K OptionalTHP9045W iringModule
Terminal [9]

1H/1C System (2 transformer s)

Rc Power (cooling transfor mer) [1, 2]
R Power (heating transfor mer) [1, 2]
W Heat relay
Y Compressor contactor
G Fan relay
C 24VACcommon[3,4]
K OptionalTHP9045W iringModule
Terminal [9]

Heat Only System Wit h Fan

Rc Power [1]
R [R+Rc joined by jum per]
W Heat relay
G Fan relay
C 24VACcommon[3]

Cool Only System

Rc Power [1]
R [R+Rc joined by jum per]
Y Compressor contactor
G Fan relay
C 24VACcommon[3]
K OptionalTHP9045W iringModule
Terminal [9]

2H/2C System (2 tran sformers)

Y2 Cool relay 2
W2 Heat relay 2
Rc Power (cooling transfor mer) [1, 2]
R Power (heating transfor mer) [1, 2]
W Heat relay 1
Y Cool relay 1
G Fan relay
C 24VACcommon[3,4]
K OptionalTHP9045W iringModule
Terminal [9]
Wiring guide—heat pump systems
Wiring

See [notes] below

[1] Power suppl y. Provide disconnect means and ove rload protection as require d.
[2] Remove jum per for 2 transformer system s.
 [3] Connectio nto24VACcommonatthetransform erisrequired.
[4] Common c onnection must come from c ooling transformer.
[5] O/B set to control a s either O or B in installer setu p.
[6] If Lterminalisused,24VACcommon(term inalC)must be connecte d.
[7] Heat pum p reset (powered continuou sly when thermostat is set to Em . Heat; system monitor
when set to Heat, Cool, or Of f).
[8] Instal l field jumper between Aux and E te rminals if there is no emerge ncy heat relay.
 [9] See"OptionalTHP9045WiringModule" on page 14 for more details.