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9
Wiring humidification, dehumidification and ventilation
"U" terminals can be used for humidification, dehumidification or ventilation.
M38719
TYPICAL HOOKUP OF POWERED HUMIDIFIER TYPICAL HOOKUP OF NON-POWERED HUMIDIFIER
U3
U3
U2
U2
U1
U1
RH
RC
R
C
TYPICAL HOOKUP OF POWERED VENTILATION
TYPICAL HOOKUP OF NON-POWERED VENTILATION
TYPICAL HOOKUP OF POWERED DEHUMIDIFIE
R
(WHOLE HOUSE DEHUMIDIFER)
TYPICAL HOOKUP OF VARIABLE SPEED BLOWER
FOR DEHUMIDIFICATION IN LOW SPEED
ANY COMBINATION OF RELAYS (U1, U2, U3) CAN BE USED. THEY ARE SET IN THE THERMOSTAT
INSTALLER SETUP.
WIRE THE U 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.
24
VAC
120
VAC
24
VAC
120
VAC
POWERED
HUMIDIFIER
U3
U3
U2
U2
U1
U1
RH
RC
R
C
24
VAC
120
VAC
NON-POWERED
HUMIDIFIER
U3
U3
U2
U2
U1
U1
RH
RC
R
C
24
VAC
120
VAC
24
VAC
120
VAC
POWERED
VENTILATOR
U3
U3
U2
U2
U1
U1
RH
RC
R
C
24
VAC
120
VAC
NON-POWERED
VENTILATOR
2
1
U3
U3
U2
U2
U1
U1
RH
RC
R
C
24
VAC
120
VAC
24
VAC
120
VAC
POWERED
DEHUMIDIFIER
U3
U3
U2
U2
U1
U1
RH
RC
R
C
24
VAC
120
VAC
LOW SPEED FAN
CONNECTION
AT FURNACE
NORMALLY-OPEN, DRY CONTACTS
NORMALLY-CLOSED, DRY CONTACTS