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TCONT802AS32DA TOUCH SCREEN AND TCONT803AS32DA TOUCH SCREEN WITH DEHUMIDIFICATION
Pub. No. 18-HD25D19-3
3
69-1790—3
Fig. 5. Typical hookup of single-stage heat and cool 
system with single transformer (1H/1C).
Fig. 6. Typical hookup of single-stage heat and cool 
system with two transformers (1H/1C).
Fig. 7. Typical hookup of two-stage indoor and 
two-stage cooling unit in a single transformer system 
(2H/2C or 2H/1C or 1H/2C).
Fig. 8. Typical hookup of two-stage indoor and 
two-step scroll cooling unit in a single transformer 
system (2H/2C or 2H/1C or 1H/2C).
1
M22637
FACTORY INSTALLED JUMPER.
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.  AVAILABLE 
ON SELECT MODELS.  WIRES MUST HAVE A CABLE SEPARATE  
FROM THE THERMOSTAT CABLE.
1
2
2
RC
S1
R
S2
W1
Y
G
B
HEAT/COOL
T
B/C
W3
W2
W1
G
Y
R
AIR 
HANDLER
Y
B
COOLING UNIT
O.D. SECTION
(SINGLE STAGE)
TO POWER SUPPLY
PER LOCAL CODES
(3 PH 
ONLY)
INDOOR
OUTDOOR
ODT
Y2
W2
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.  AVAILABLE 
ON SELECT MODELS.  WIRES MUST HAVE A CABLE SEPARATE  
FROM THE THERMOSTAT CABLE.
1
1
RC
S1
R
S2
W1
Y
G
B
HEAT/COOL
T
B/C
W
T
T
G
Y
R
OIL
FURNACE
Y
B
COOLING UNIT
O.D. SECTION
(SINGLE STAGE)
TO POWER SUPPLY
PER LOCAL CODES
(3 PH 
ONLY)
M22638
OIL BURNER PRIMARY
INDOOR
OUTDOOR
Y2
W2
1
M22640
FACTORY INSTALLED JUMPER.
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.  AVAILABLE 
ON SELECT MODELS.  WIRES MUST HAVE A CABLE SEPARATE  
FROM THE THERMOSTAT CABLE.
1
2
2
RC
S1
R
S2
W1
Y
G
B
HEAT/COOL
T
B/C
G
Y
Y
LO
BK
R
VARIABLE SPEED 
TWO-STAGE 
FURNACE/VARIABLE
SPEED AIR HANDLER 
B
COOLING UNIT
O.D. SECTION
(TWO STAGE)
TO POWER SUPPLY
PER LOCAL CODES
(3 PH 
ONLY)
INDOOR
OUTDOOR
W2
Y2
O
Y2
W1
Y1
W2
M24231
FACTORY INSTALLED JUMPER. 
 
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.  AVAILABLE 
ON SELECT MODELS.  WIRES MUST HAVE A CABLE SEPARATE   
FROM THE THERMOSTAT CABLE. 
 
THE INSTALLER MUST JUMPER AT THE LVTB “R” TO “O”. 
RC 
S1 
S2 
W1 
HEAT/COOL 
B/C 
Y
LO 
BK 
VARIABLE SPEED 
TWO STAGE  
FURNACE 
16 SEER
COOLING UNIT
O.D. SECTION
(TWO STEP)
TO POWER SUPPLY 
PER LOCAL CODES 
(3 PH  
ONLY) 
INDOOR 
OUTDOOR 
W2 
Y2 
  
 
Y2 
W1 
Y1 
W2