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