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TCONT802AS32DA TOUCH SCREEN AND TCONT803AS32DA TOUCH SCREEN WITH DEHUMIDIFICATION
Pub. No. 18-HD25D19-3
69-1790—3 8
Fig. 15. Typical hookup of multistage two-step scroll heat pump with two stage variable speed gas furnace
(3H/2C heat pump).
Powering the Comfort Control
The Comfort Control can be powered with 24 Vac.
24 Vac Common Power (Recommended)
Wire the common side of the transformer to the B screw
of the comfort control wallplate. When installing in a single
transformer system, keep the jumper wire between the R
and Rc screws. When installing in a two-transformer
system, use the common from the cooling transformer to
connect to the B screw and remove the jumper wire
between the R and Rc screws.
Battery Power (Optional)
CAUTION
Equipment or Property Damage Hazard.
Using battery power only may not provide
adequate power to comfort control and can
cause damage during freezing conditions.
Connect the 24 Vac Common (B) wire from the
system transformer to the comfort control for
proper operation when the battery power is
drained.
Three AAA alkaline batteries can be used to power the
comfort control for armchair programming only. To prevent
the comfort control and heating/cooling system from
shutting down due to lack of battery power, it is not
recommended that the comfort control be solely powered
with the three AAA batteries during normal system
operation. When using batteries, make sure positive and
negative terminals are oriented correctly, as marked on
the device. See Fig. 16.
Fig. 16. Installing batteries on comfort control back.
W1 W2
G
YB/C
R
T
1
1
2
3
FACTORY INSTALLED JUMPER.
OUTDOOR REMOTE SENSOR. WIRES MUST HAVE A
CABLE SEPARATE FROM THE THERMOSTAT CABLE.
Y2
R O BR(T)X2/BK
B
16 SEER
HEAT PUMP
O.D. SECTION
(TWO STEP)
Y1
2
VARIABLE
SPEED
TWO STAGE
FURNACE
INDOOR
OUTDOOR
HEAT PUMP
RC
R
O
Y
G
B
Y2
F
X2
W1
S1
S2
TO POWER SUPPLY
PER LOCAL CODES
(3 PH
ONLY)
M24203
1
3
BK
O
Y
LO
REMOVE / CUT JUMPER FROM R TO BK.
M19918
BATTERIES (3)