TH7000 Series
3
69-2668—03
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.
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.
Aux
Auxiliary heat relay.
G
Fan relay.
E
Emergency heat 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.
S2
Optional outdoor or remote sensor.
CONVENTIONAL
HEAT PUMP
C
G
Y
O/B
RC
R
AUX
E
L
S1
S2
C
G
Y
W
RC
R
W2
Y2
NOT
USED
S1
S2
MCR31515
M28420
For 24VAC primary power, connect
common side of transformer to
“C” terminal.
Insert supplied batteries for
primary or backup power.
Power options
Push excess wire back into the wall opening.
Plug wall opening with non-flammable insulation.
Remove factory-installed jumper
only
for two-transformer systems.
Terminal Designations
Shaded areas below apply only to
TH7220
.
Wiring
CONVENTIONAL
HEAT PUMP
C
G
Y
O/B
RC
R
AUX
E
L
S1
S2
C
G
Y
W
RC
R
W2
Y2
NOT
USED
S1
S2
SCREW
INSERT WIRES
THEN TIGHTEN SCREWS
WIRE HOLE
MCR31517
