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VisionPRO
TM
8000 Touchscreen Programmable Thermostat
68-0280—01 6
NOTES:
1. When used in a single-transformer system, leave
metal jumper wire in place between Rc and R. If
used on a two-transformer system, remove metal
jumper wire between Rc and R.
2. Common wire is optional when thermostat is used
with batteries.
3. If thermostat is configured for a heat pump system
in the Installer Setup, configure changeover valve
for cool (O-factory setting) or heat (B).
4. L terminal is an input (system monitor) when the
System mode is in the Heat, Off, Cool or Auto
position. L terminal is a 24 Vac output when
System mode is Emergency Heat. Must connect
the 24 Vac Common when using the L terminal.
See LED Indication section for more details.
Fig. 9. Typical hookup of conventional single-stage heat
and cool system with single transformer
(1H/1C conventional).
Fig. 10. Typical hookup of conventional single-stage heat
and cool system with two transformers
(1H/1C conventional).
Table 2. Terminal Designation Descriptions.
Terminal
Designation Description
Rc (see Note
1)
Power for cooling--connect to
secondary side of cooling system
transformer
R (see Note 1) Power for heating--connect to
secondary side of heating system
transformer
C (see Note 2) Common wire from secondary side of
cooling system transformer
W Heat relay
Y Compressor contactor
GFan relay
Y2 Second stage cooling
W2 Second stage heat relay
O/B (see Note
3)
Changeover valve for heat pump
systems
AUX Auxiliary heat relay for heat pump
systems
E Emergency heat relay for heat pump
systems
L (see note 4) Equipment monitor for heat pump
systems
S1, S2 Optional outdoor or indoor remote
sensor
COMPRESSOR
CONTACTOR
M19895
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
HEAT RELAY
FAN
RELAY
R
C
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
1
1
3
2
3
OPTIONAL
24 VAC
COMMON
CONNECTION
Y2
RC
S1
R
S2
W
W2
Y
G
C
2
CONVENTIONAL
C
R
1
COMPRESSOR
CONTACTOR
M19896
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
HEAT RELAY
FAN
RELAY
R
C
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
REMOVE FACTORY INSTALLED JUMPER.
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
1
1
3
2
3
OPTIONAL
24 VAC
COMMON
CONNECTION
Y2
RC
S1
R
S2
W
W2
Y
G
C
2
CONVENTIONAL