Honeywell Home THM5421R1021 Guia De Instalacion página 10

Wiring humidification, dehumidification and ventilation
(Prestige and RedLINK VisionPRO models only.)
"U" terminals can be used for humidification, dehumidification or ventilation.
Typical hookup of powered humidifier
U3
U3
U2
U2
U1
POWERED
HUMIDIFIER
U1
RH
RC
R 24
24
VAC
VAC
C
Typical hookup of powered ventilation
U3
U3
U2
U2
U1
POWERED
VENTILATOR
U1
RH
RC
R 24
24
VAC
VAC C
Typical hookup of powered dehumidifier
(whole house dehumidifer)
U3
U3
U2
U2
U1
POWERED
DEHUMIDIFIER
U1
RH
RC
R 24
24
VAC
VAC C
1
Any combination of universal relays (U1, U2, U3) can be used. They are set in
the thermostat installer setup.
2
Wire the universal EIM relay to the low speed fan for dehumidification control
at the equipment. The EIM relay can be set to be normally open or normally
closed in the thermostat installer setup.
Normally open, dry contacts
Normally closed, dry contacts
24 120
VAC VAC
120
VAC
M39129
24 120
VAC VAC
120
VAC
M39130
24 120
VAC VAC
120
VAC
M39131
Typical hookup of non-powered
humidifier
U3
1
U3
U2
U2
NON-POWERED
U1
HUMIDFIER
U1
RH
RC
R
24
24
VAC
C
VAC
Typical hookup of non-powered
ventilation
U3
1
U3
U2
U2
NON-POWERED
U1
VENTILATOR
U1
RH
RC
R
24
24
VAC
C
VAC
Typical hookup of variable speed blow-
er for dehumidification in low speed
U3
1
U3
U2
U2
DEHUMIDIFICATION
U1
WITH LOW SPEED FAN
OR
U1
RH
RC
R
24
VAC
C
10
FIELD INSTALLED
JUMPER BETWEEN
R AND U1
120
VAC
M39132
FIELD INSTALLED
JUMPER BETWEEN
R AND U1
120
VAC
M39133
MFCR31587
2
FIELD INSTALLED
JUMPER BETWEEN
R AND U1
120
24
VAC
VAC
M39134