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TB7100A1000 MULTIPRO™ MULTISPEED AND MULTIPURPOSE THERMOSTAT
63-2675—03 6
Table 5. Terminal Designation Descriptions. NOTES:
1. When used in a single-transformer system, leave
metal jumper wire in place between Rc and R. If
used on a two-transformer system, remove metal
jumper wire between Rc and R.
2. Common wire is optional when thermostat is used
with batteries. When using separate transformers
for heating and cooling, the common must come
from the cooling transformer.
3. If thermostat is configured for a heat pump in the
Installer Setup, configure changeover valve for
cool (O-factory setting) or heat (B).
4. Sensor wires must have a cable separate from the
thermostat control cable.
Conventional System Wiring
Fig. 11. Typical wiring of single transformer 1H/1C system.
Fig. 12. Typical hookup of dual transformer 1H/1C system.
Terminal
Designation Description
Rc
(see Note 1)
Power for cooling—connect to secondary side
of cooling system transformer.
R
(see Note 1)
Power for heating—connect to secondary side
of heating system transformer.
Y Compressor output.
C
(see Note 2)
Common wire from secondary side of cooling
system transformer.
W1 Heat relay. Auxiliary heat relay for heat pump,
PTAC.
G Fan relay. Low fan speed for fan coil and PTAC.
G2 Fan relay. Medium fan speed for fan coil only.
G3 Fan relay. High fan speed for fan coil and
PTAC.
O/B
(see Note 3)
Changeover valve for heat pumps.
S1
(See Note 4)
Indoor remote sensor, remote setback, or
changeover input.
S2
(See Note 4)
Indoor remote sensor, remote setback, or
changeover input.
COMPRESSOR CONTACTOR
INDOOR TEMPERATURE
SENSOR/REMOTE
SETBACK
FAN RELAY
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
1
2
3
C
G
Y
O/B
RC
R
W1
G2
G3
S1
S2
2
3
L1
(HOT)
L2
1
24 VAC
M27416
HEAT RELAY
COMPRESSOR CONTACTOR
M27417
HEAT RELAY
FAN RELAY
COOLING
TRANSFORMER
HEATING
TRANSFORMER
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
REMOVE FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL. WHEN USED, THE COMMON MUST CONNECT
TO THE COOLING TRANSFORMER SECONDARY.
1
3
2
3
L1
(HOT)
L2
1
24 VAC
L1
(HOT)
L2
1
24 VAC
C
G
Y
O/B
RC
R
2
INDOOR TEMPERATURE
SENSOR/REMOTE
SETBACK
W1
G2
G3
S1
S2