Lennox EDA - Page 16

16
NUMBER OF WIRES REQUIRED—Indoor unit to: Air Sensors (Optional)
System Type Humiditrol EDA
iComfort S30
Outdoor unit Discharge Outdoor
1-stage AC
3 4 4 2 2
2-stage AC
1-stage HP
2-stage HP
CHARGE
DOOR
Air Sensors
(optional)
Lennox Communicating
FURNACE (IFC) OR
AIR HANDLER (AHC)
iComfort
®
S30 Smart
Hub)
Operation sequence for
dehumidification
1. REMOVE 24 VOLTS FROM DH AND/OR
DS
2. THERMOSTAT CYCLES OUTDOOR
UNITS TO Y2
3. INDOOR AND OUTDOOR FAN SPEEDS
REDUCED
MAXIMUM TOTAL LENGTH OF ALL
CONNECTIONS ON THE RSBUS IS LIMITED
TO 1500FT.
WIRE GAUGE OF RSBUS WIRE IS 18.
OUTDOOR UNITS (A175) - WIRE EITHER CONTROL IDENTICALLY
CURRENT CONTROL EARLY CONTROL
GREY
RED
EDA VALVE
ACTUATOR
EDA RELAY
BLACK
VIOLET
ORANGE
EDA VA LVE
ACTUATOR
EDA RELAY
RED
IN COMMUNICATING SYSTEM, THERMOSTAT DS
INPUT IS NOT USED AND DEHUMIDIFICATION IS
CONTROLLED VIA DEHUMIDIFICATION RELAY THAT
CONTROLS 24VAC OUTPUT ON DH TERMINAL.
1N4005 DIODE (shrink wrapped -
diode is concealed in the wire.)
EARLIER
MODEL VALVE
ACTUATOR
LATER MODEL VALVE
ACTUATOR
L1
Humiditrol
Humiditrol
Figure 15. S30 Wired System for Communicating