Prestige™ Installation Guide

Wiring guide

See detailed wiring guides for specific system types on following pages.

Conventional Terminal Letters:Heat Pump Terminal Letters:

C

Common wire from secondary side of

C

Common wire from secondary side of

 

cooling transformer.

 

cooling system transformer.

Rc

Cooling power. Connect to secondary

Rc

Cooling power. Connect to secondary

 

side of cooling system transformer.

 

side of cooling system transformer.

R

Heating power. Connect to secondary

R

Heating power. Connect to secondary

 

side of heating system transformer.

 

side of heating system transformer.

W

Heat relay (stage 1).

O/B Changeover valve for heat pumps.

W2

Heat relay (stage 2).

Aux/E Auxiliary/Emergency heat relay.

Y

Compressor contactor (stage 1).

Y

Compressor contactor (stage 1).

Y2

Compressor contactor (stage 2).

Y2

Compressor contactor (stage 2).

G

Fan relay.

G

Fan relay.

K

THP9054 connection (see note below)

L

Heat pump reset (powered continuously

 

 

 

when System is set to Em Heat; system

 

 

 

monitor when set to Heat, Cool or Off).

 

 

K

THP9054 connection (see note below)

Note: Do not connect wires to terminals marked “Not Used.”

Note: Use the K terminal in place of the Y and G terminals to provide full fan and compressor control though a single wire. The K terminal must be connected to the THP9045 Wiresaver module (see page 14). The K terminal can not be used in heat-only applications.

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