Wiring; Power Options; Terminal Designations - Honeywell VisionPRO TH8000 Series Installation Manual

Power options

E/AUX
U1
U1
For 24VAC primary power, connect common
side of transformer to "C" terminal.

Wiring

E/AUX
U1 U1

Terminal Designations

Conventional Terminal Letters:
R
System power. Connect to secondary
side of system transformer.
C Common wire from secondary side of
transformer.
W
1st stage heat relay.
W2
2nd stage heat relay.
Y 1st stage compressor contactor.
Y2 2nd stage compressor contactor.
G Fan relay.
S1/S2 Optional outdoor/remote/discharge
sensor.
U1/U1 Optional IAQ device
R
U1
U1
Push excess wire back into the wall opening. Plug
wall opening with non-flammable insulation.
R
U1
U1
VisionPRO
Insert supplied batteries for
primary or backup power.
Heat Pump Terminal Letters:
R
System power. Connect to secondary
side of system transformer.
C Common wire from secondary side of
system transformer.
Y
1st stage compressor contactor.
Y2
2nd stage compressor contactor.
E/Aux Auxiliary/Emergency heat relay.
G Fan relay.
L Heat pump reset (powered
continuously when System is set to
Em Heat; system monitor when set to
Heat, Cool or Off).
O/B Changeover valve for heat pumps.
S1/S2 Optional outdoor/remote/discharge
sensor.
U1/U1 Optional IAQ device
3
TH8000 Series
TM
MCR29723
MCR29724
69-2389—03