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TB7100A1000 MULTIPRO™ MULTISPEED AND MULTIPURPOSE THERMOSTAT
Table 5. Terminal Designation Descriptions.
Terminal
Designation
Rc
Power for cooling—connect to secondary side
(see Note 1)
of cooling system transformer.
R
Power for heating—connect to secondary side
(see Note 1)
of heating system transformer.
Y
Compressor output.
C
Common wire from secondary side of cooling
(see Note 2)
system transformer.
W1
Heat relay. Auxiliary heat relay for heat pump,
PTAC.
G
Fan relay. Low fan speed for fan coil and PTAC.
G2
Medium fan speed. Fan coil.
G3
High fan speed. Fan coil and PTAC.
O/B
Changeover valve for heat pumps.
(see Note 3)
S1
Indoor remote sensor, remote setback, or
(See Note 4)
changeover input.
S2
Indoor remote sensor, remote setback, or
(See Note 4)
changeover input.
Conventional System Wiring
C
1
L1
G
(HOT)
Y
24 VAC
O/B
RC
L2
R
COMPRESSOR CONTACTOR
FAN RELAY
HEAT RELAY
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
3
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
Fig. 11. Typical wiring of single transformer 1H/1C system.
63-2675—01
Description
3
W1
G2
G3
S1
S2
2
INDOOR TEMPERATURE
SENSOR/REMOTE
SETBACK
M27416
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.
COMPRESSOR CONTACTOR
1
L1
(HOT)
24 VAC
L2
COOLING
TRANSFORMER
L1
1
(HOT)
24 VAC
L2
HEATING
TRANSFORMER
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
REMOVE FACTORY INSTALLED JUMPER.
3
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL. WHEN USED, THE COMMON MUST CONNECT
TO THE COOLING TRANSFORMER SECONDARY.
Fig. 12. Typical hookup of dual transformer 1H/1C system.
6
FAN RELAY
3
C
G
Y
O/B
RC
2
R
INDOOR TEMPERATURE
SENSOR/REMOTE
HEAT RELAY
W1
G2
G3
S1
S2
SETBACK
M27417
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