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

Power options

NOT
USED
For 24VAC primary power, connect common
side of transformer to "C" terminal.

Wiring

Remove factory-installed jumper
only for two-transformer systems.
NOT
USED

Terminal Designations

Conventional Terminal Letters:
R Heating power. Connect to secondary
side of heating system transformer.
Rc Cooling power. Connect to secondary
side of cooling system transformer.
C Common wire from secondary side of
cooling transformer (if 2 transformers).
W 1st stage heat relay.
W2 2nd stage heat relay.
Y 1st stage compressor contactor.
Y2 2nd stage compressor contactor.
G Fan relay.
S1 Optional outdoor or remote sensor.
S2 Optional outdoor or remote sensor.
Insert supplied batteries for
primary or backup power.
Push excess wire back into the wall opening. Plug
wall opening with non-flammable insulation.
Shaded areas below apply only to TH8320/TH8321.
Heat Pump Terminal Letters:
R Heating power. Connect to secondary
side of heating system transformer.
Rc Cooling power. Connect to secondary
side of cooling system transformer.
C Common wire from secondary side of
cooling system transformer.
Y 1st stage compressor contactor.
Y2 2nd stage compressor contactor.
Aux/E 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 Optional outdoor or remote sensor.
Optional outdoor or remote sensor.
S2
3
VisionPRO TH8000 Series
TM
MCR29483
69-2693—01
MCR29482