Honeywell VisionPRO Series Installation Guide

5
Terminal Designations
Conventional System Heat Pump
Terminal Description Terminal Description
C
Common wire from secondary side of
cooling transformer (if 2 transformers).
C
Common wire from secondary side of
cooling transformer.
Rc* Cooling power. Rc Cooling power.
R* Heating power. R Heating power.
W Heat Stage 1 O/B Changeover valve for heat pumps.
W2 Heat Stage 2 AUXE Backup Heat/Emergency Heat
Y Compressor Stage 1 Y Compressor Stage 1
Y2 Compressor Stage 2 Y2 Compressor Stage 2
G Fan Relay G Fan Relay
A
Connect to Economizer Module or
Lighting Panel (TOD).
L/A
Connect to Compressor Monitor,
Zone Panel, Economizer Module or
Lighting Panel (TOD).
U1 / U1
Relay for humidification,
dehumidification, ventilation, or a
stage of heating/cooling.
U1 / U1
Relay for humidification,
dehumidification, ventilation, or a
stage of heating/cooling.
S1 / S1
Input for a wired indoor, outdoor or
discharge sensor.
S1 / S1
Input for a wired indoor, outdoor or
discharge sensor.
K** Connect to K on C-wire adaptor. K** Connect to K on C-wire adaptor.
* Remove factory installed jumper for two transformer systems.
** The THP9045A1098 C-wire adaptor is used on heat/cool systems when you only have four wires at the thermostat and
you would like the thermostat to be powered with a common wire. Use the K terminal in place of the Y and G terminals on
conventional or heat pump systems to provide control of the fan and the compressor through a single wire—the unused wire
then becomes your common wire. See THP9045 instructions for more information.
C
K
R
C
R
U1
U1
120
VAC
24
VAC
C
R
SYSTEM
TRANSFORMER
120
VAC
24
VAC
HUM, DEHUM OR
VENT TRANSFORM-
ER
THERMOSTAT
POWERED
HUMIDIFIER,
DEHUMIDIFIER
OR VENTILATOR
C
K
R
C
R
U1
U1
120
VAC
24
VAC
C
R
SYSTEM
TRANSFORMER
THERMOSTAT
NON-POWERED
HUMIDIFIER,
DEHUMIDIFIER
OR VENTILATOR
FIELD INSTALL JUMPER
BETWEEN R AND U1
CONNECTING A HEAT OR COOL STAGE TO U1DEHUMIDIFICATION WITH LOW SPEED FAN
NONPOWERED HUMIDIFIER, DEHUMIDIFIER OR VENTILATORPOWERED HUMIDIFIER, DEHUMIDIFIER OR VENTILA
TOR
Wire the thermostat U1 terminal to the low speed fan for
dehumidification control at the equipment as shown. The
relay can be set to normally open or normally closed in the
installer setup.
1
U1 terminals are normally open dry contacts when
set up for a stage of heating or cooling.
You must install a field jumper if the stage of heat-
ing or cooling is powered by system transformer. Do
NOT install a field jumper if the stage of heating has
its own transformer.
1
2
Normally open, dry contacts
Normally closed, dry contacts
1
C
K
R
C
R
U1
U1
120
VAC
24
VAC
C
R
SYSTEM
TRANSFORMER
THERMOSTAT
DEHUMIDIFICATION
WITH LOW SPEED FAN
FIELD INSTALL JUMPER
BETWEEN R AND U1
OR
2
C
K
R
C
R
U1
U1
120
VAC
24
VAC
C
R
TRANSFORMER
THERMOSTAT
HEAT STAGE 3, COOL
STAGE 3, BACKUP HEAT
STAGE 2 FOR HEAT
PUMPS, OR GEOTHERMAL
RADIANT HEAT
1

Honeywell VisionPRO Series Specifications

General

Programmable	Yes
Connectivity	Wi-Fi (some models)
Compatibility	Works with most HVAC systems
Operating Modes	Heat, Cool, Auto, Emergency Heat
Remote Access	Yes
Indoor Humidity Control	No
Backup Battery	Yes
Color Options	White