PRO TH4000 Series
3
69-1928EFS—01
ENGLISH
Power options
TH4110D:
C
24 Vac common. For 2-transformer
systems, use common wire from
cooling transformer.
B
Changeover valve energized in
heating
R
24 Vac power from heating
transformer
Rc
24 Vac power from cooling
transformer
O
Changeover valve energized in
cooling
G
Fan relay
Y
Compressor contactor
W
Heat relay
TH4210D:
C
24 Vac common
B
Changeover valve energized in
heating
R
24 Vac power
L
Sends output when set to Em. Heat
O
Changeover valve energized in
cooling
G
Fan relay
Y
Compressor contactor
Aux
Auxiliary heat relay
E
Emergency heat relay
Terminal designations
Wiring
KEEP WIRES IN
THIS SHADED AREA
REMOVE FACOTRY-
INSTALLED JUMPER
ONLY FOR TWO-
TRANSFORMER
SYSTEMS
INSERT BATTERIES FOR
PRIMARY OR BACKUP POWER
CONNECT C FOR PRIMARY
AC POWER (OPTIONAL IF
BATTERIES ARE INSTALLED)
TH4110D TERMINAL
BLOCK SHOWN
MCR29267
C
R
O
G
Y
W
B
Rc
MCR29273
TH4110D
M29274
C
R
O
G
Y
E
B
Aux
L
TH4210D
