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T8000C, T8001C AND T8024D PROGRAMMABLE THERMOSTATS
68-0195–2
5
L1
(HOT)
L2
M12561
FAN
RELAY
T8000C THERMOSTAT
COMPRESSOR
CONTACTOR
TRANSFORMER
COOL
DAMPER
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT
PUMP SYSTEMS.
JUMPER R TO Rc.
2
3
2
2
1
Y
G
Rc
W
3
R
B
O
HEAT
RELAY
HEAT
DAMPER
Fig. 8. T8000C heat-cool wiring diagram on a
zone 1 MABS II Mastertrol control panel.
T8
T7
T6
T5
O1
G1
B1
E1
T4
ZONE 1
CHANGEOVER
CONTROL
M12563
Y
G
Rc
W
1
1JUMPER R TO RC.
R
B
O
T8000C THERMOSTAT
Fig. 9. T8001C heat-cool wiring diagram in single
transformer system with gas heat/electric cooling.
Fig. 6. T8000C heat-cool wiring diagram in single
transformer system with gas heat/electric cooling.
Fig. 7. T8000C wiring diagram in heat/cool
system with two transformers.
Y
G
Rc
W
2
4
R
B
O
M12562
L1
(HOT)
L2
FAN
RELAY
HEAT
RELAY
L1
(HOT)
L2
COMPRESSOR
CONTACTOR
HEATING
TRANSFORMER
COOLING
TRANSFORMER
HEAT
DAMPER
COOL
DAMPER
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
REMOVE RC TO R JUMPER WHEN INSTALLED ON A TWO TRANSFORMER
SYSTEM.
CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT
PUMP SYSTEMS.
POWER TO R TERMINAL IS REQUIRED WHEN THE SYSTEM SWITCH IS IN
THE OFF POSITION.
2
3
3
1
1
3
4
L1
(HOT)
L2
M12566
FAN
RELAY
HEAT
RELAY
COMPRESSOR
CONTACTOR
TRANSFORMER
HEAT
DAMPER
COOL
DAMPER
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT
PUMP SYSTEMS.
2
2
2
1
Y
G
C
W
2
R
B
O
T8001 THERMOSTAT
T8
T7
T6
T5
O1
G1
B1
E1
T4
M1
ZONE 1
CHANGEOVER
CONTROL
M12567
Y
G
C
W
R
B
O
T8001 THERMOSTAT
Fig. 10. T8001C heat-cool wiring diagram on a
zone 1 MABS II Mastertrol control panel.