FocusPRO
TM
TH5110 / TH50
Power options
Keep wires in this
shaded area
Connect
C
for primary AC power
(optional if batteries are installed).
Insert batteries for primary
or backup power.
Remove factory-
installed jumper
only for two-
transformer
systems.
Conventional Terminals:
Rc
24VAC power from cooling
transformer
R
24VAC power from heating
transformer
W
Heat relay (stage 1)
W2
Heat relay (stage 2)
Y
Compressor contactor (stage 1)
Y2
Compressor contactor (stage 2)
G
Fan relay
C
24VAC common. For 2 transformer
systems, use common wire from
cooling transformer.
Heat Pump Terminals:
Rc
24VAC power from cooling
transformer
R
24VAC power from heating
transformer
O/B
Changeover valve
Y
Compressor contactor
G
Fan relay
Aux
Auxiliary heat relay
E
Emergency heat relay
L
Sends output when set to Em. Heat
C
24VAC common
Wiring
Terminal designations
Shaded areas below apply only to
TH5220D
.
TH5110D
Rc
Y
W
G
R
C
TH5110D
Rc
Y
O/B
G
R
C
TH5220D
Rc
Y
W
G
W2
Y2
R
C
Rc
Y
G
Aux
E
L
R
C
TH5220D
TH5320U
Rc
Y
W
G
W2
Y2
R
C
Rc
Y
G
Aux
E
Y2
L
R
C
TH5320U
TH5110D
Rc
Y
W
G
R
C
TH5110D
Rc
Y
O/B
G
R
C
TH5220D
Rc
Y
W
G
W2
Y2
R
C
Rc
Y
G
Aux
E
L
R
C
TH5220D
TH5320U
Rc
Y
W
G
W2
Y2
R
C
Rc
Y
G
Aux
E
Y2
L
R
C
TH5320U
OBSOLETE