69-1432-1
3
T8000, T8001 PROGRAMMABLE THERMOSTAT
KEEP WIRING IN
SHADED AREA
MOUNTING
SCREW HOLE
MOUNTING
SCREW HOLE
WIRING ENTRANCE
HOLE
M12565
G
R
C
Y
W
B
O
Fig. 4. Restrict wiring to shaded area.
The T8001 Thermostat is powered directly from the
system transformer and is adaptable to most 18 to 30 Vac
heating-cooling systems. All T8001 Thermostats require a
common wire to supply power. Refer to Fig. 5 - 8 for
typical wiring hookups.
L1
(HOT)
L2
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
Fig. 5. Typical hookup of T8001 in heat-cool system
with one transformer.
Fig. 6. Typical wiring diagram for T8001 on a zone 1
MABS II or Masterol™ control panel.
Fig. 7. Typical wiring diagram for T8000 in heat-cool
system with one 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
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
2
2
1
Y
G
Rc
W
3
R
B
O
HEAT
RELAY
HEAT
DAMPER
3
T8
T7
T6
T5
O1
G1
B1
E1
T4
M1
ZONE
HANGEOVER
ONTROL
M12567
Y
G
C
W
R
B
O
T8001 THERMOSTAT
Fig. 8. Typical wiring diagram for T8000 in heat-cool
system with two transformers.
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