Honeywell VisionPRO 8000 Product Data page 6

TM
VisionPRO 8000 Touchscreen Programmable Thermostat
Table 2. Terminal Designation Descriptions.
Terminal
Designation
Rc (see Note Power for cooling--connect to
1) 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
G Fan relay
Y2 Second stage cooling
W2 Second stage heat relay
O/B (see Note Changeover valve for heat pump
3) 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
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.
68-0280—01
Description
6
Y2 RC
R
W
W2 Y
S1
G
S2 C
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2 FACTORY INSTALLED JUMPER.
3 OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
Fig. 9. Typical hookup of conventional single-stage heat
and cool system with single transformer
(1H/1C conventional).
RC
Y2
R
W
Y
W2
S1
G
S2 C
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
REMOVE FACTORY INSTALLED JUMPER.
3 OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
Fig. 10. Typical hookup of conventional single-stage heat
and cool system with two transformers
(1H/1C conventional).
CONVENTIONAL
2
OPTIONAL
24 VAC
COMMON
CONNECTION
FAN
RELAY
COMPRESSOR
CONTACTOR
HEAT RELAY
M19895
CONVENTIONAL
2
OPTIONAL
24 VAC
COMMON
CONNECTION
FAN
RELAY
COMPRESSOR
CONTACTOR
HEAT RELAY
M19896
1
R
C
1
R
C
1
C
R