Wiring Iaq Equipment Or A Heat/Cool Stage To The U Terminals - Honeywell Home VisionPRO 8000 Manual

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VISIONPRO 8000 WITH REDLINK™

Wiring IAQ Equipment or a Heat/Cool Stage to the U Terminals

To Thermostat
"U" terminals can be used for humidification, dehumidification, ventilation or a stage of heating/cooling.
THERMOSTAT
C
K
R
C
R
POWERED
U1
HUMIDIFIER,
DEHUMIDIFIER
U1
OR VENTILATOR
Fig. 328. Wiring a powered humidifier, dehumidifier, or
ventilator.
THERMOSTAT
C
K
R
C
R
1
U1
OR
U1
Fig. 329. Dehumidification with low speed fan using a
variable speed blower.
1Wire the thermostat relay to the low speed fan for dehu-
midification control at the equipment. The thermostat
relay can be set to normally open or normally closed in
the thermostat installer setup.
Normally open, dry contacts
Normally closed, dry contacts
68-0312—06
SYSTEM
TRANSFORMER
C
24 120
VAC VAC
R
HUM, DEHUM OR
VENT
TRANSFORMER
24 120
VAC VAC
SYSTEM
TRANSFORMER
C
24 120
VAC VAC
R
FIELD INSTALL JUMPER
BETWEEN R AND U1
DEHUMIDIFICATION
WITH LOW SPEED FAN
THERMOSTAT
C
K
R
C
FIELD INSTALL JUMPER
R
BETWEEN R AND U1
U1
NON-POWERED
U1
DEHUMIDIFIER
OR VENTILATOR
Fig. 330. Wiring a non-powered humidifier, dehumidifier,
THERMOSTAT
C
K
R
C
R
1
2
U1
U1
Fig. 331. Wiring a heat or cool stage to U1.
1U1 terminals are normally open dry contacts when set up
for a stage of heating or cooling.
2You must install a field jumper if the stage of heating or
cooling is powered by system transformer. Do NOT install
a field jumper if the stage of heating has its own trans-
former.
130
SYSTEM
TRANSFORMER
C
24 120
VAC VAC
R
HUMIDIFIER,
or ventilator.
TRANSFORMER
C
24 120
VAC VAC
R
HEAT STAGE 3, COOL
STAGE 3, BACKUP HEAT
STAGE 2 FOR HEAT
PUMPS, OR GEOTHERMAL
RADIANT HEAT