Lennox EDA - Page 13

13
NUMBER OF WIRES REQUIRED—Indoor unit to: Thermostat to:
System Type
Humiditrol EDA
CS7500 and iComfort
M30
Outdoor Unit
Outdoor Air Sensor
1-stage AC
3
7 4
2
2-stage AC 8 5
1-stage HP 9 6
2-stage HP 10 7)
DS—R (W1) JUMPER - MUST BE CUT FOR
HUMIDITROL OPERATION. SEE W1 JUMPER DETAIL.
DS—R TRACE ON A175 - MUST BE CUT FOR
HUMIDITROL OPERATION. SEE TRACE CUT DETAIL.
DS TO R ON A92 - ON-BOARD LINK MUST BE CUT FOR
DEHUMIDIFICATION.
DS—Y1 JUMPER - MUST BE REMOVED FOR
HUMIDITROL OPERATION
HEAT PUMP APPLICATIONS ONLY - REMOVE R—O
JUMPER.
(2-STAGE ONLY) FOR HUMIDITROL OPERATION (EDA),
CONNECT FIELD PROVIDED WIRE FROM DS ON A92
TO DS ON A175.
OUTDOOR
SENSOR
(X2658)
INDOOR UNIT
24 VOLT
TERMINAL
STRIP
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
Trace cut for
Humiditrol (EDA)
application
Trace intact
CS7500 and iComfort
M30
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
SEE TRACE CUT DETAIL.
SEE W1 JUMPER DETAIL.
Clip W1 Jumper for
Humiditrol (EDA)
application
LATER MODEL VALVE
ACTUATOR
EARLIER
MODEL VALVE
ACTUATOR
1N4005 DIODE (shrink wrapped -
diode is concealed in the wire.)
L1
Humiditrol
Figure 12. CS7500 or M30 with Non-Communicating Indoor and Communicating Outdoor Units Wired for Non-Communicating