TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT

763-2636—03Conventional System Wiring

Fig. 12. Typical wiring of single transformer 1H/1C system.

Fig. 13. Typical hookup of dual transformer 1H/1C system.

Fig. 14. Typical hookup of heat-only system.

Fig. 15. Typical hookup of cool-only system.

COMPRESSOR CONTACTOR OUTDOOR/INDOOR TEMPERATURE SENSOR HEAT RELAY 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

W

RC

R

W2

Y2

S1

S2

2 3 L1 (HOT) L2 1 24 VAC
M24016
COMPRESSOR CONTACTOR
M24017
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
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 W RC R W2Y2S1S2
2
M24018
OUTDOOR/INDOOR TEMPERATURE SENSOR HEAT RELAY POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. FACTORY INSTALLED JUMPER. WHEN USING BATTERIES, THE 24V COMMON CONNECTION IS OPTIONAL. 1 3 2 3 L1 (HOT) L2 1 24 VAC
C
G
Y
W
RC
R
W2
Y2
S1
S2
2
M24019
OUTDOOR/INDOOR TEMPERATURE SENSOR FAN RELAY POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. FACTORY INSTALLED JUMPER.WHEN USING BATTERIES, THE 24V COMMON CONNECTION IS OPTIONAL.13 23COMPRESSOR CONTACTOR L1 (HOT) L2 1 24 VAC
C
G
Y
W
RC
R
W2
Y2
S1
S2
2