Control Box - Lennox XC17 Series Unit Information

PULSE−WIDTH MODULATION (PWM)
AIR
CONDITIONER
CONTROL (A175)
24
VDC
VAC
ONE YELLOW WIRE FROM PS (E24) TERMINAL ON AIR
CONDITIONER CONTROL. AND SECOND YELLOW WIRES ON
PIGGYBACK TERMINALS GOES TO S4 HIGH PRESSURE SWITCH.
GREEN
RED
RED
YELLOW
YELLOW
YELLOW
XC17
FAN MOTOR CONTROL (A177)
BLUE WIRE
BLACK WIRE
S4 HIGH PRESSURE SWITCH
AIR CONDITIONER CONTROL
Figure 22. Testing for External Power to Fan Motor Control

CONTROL BOX

INPUT VOLTAGES DURING DEMAND
ECM/Y1 ONLY − 24VDC
YELLOW WIRE
EXT PWR/R (24VAC INPUT
DURING DEMAND ONLY)
YELLOW
BLUE
BLACK
YELLOW
YELLOW
Page 44
GREEN
RED
RED
B4 FAN
MOTOR
BLACK
BROWN
FAN MOTOR
CONTROL
SEE TABLE 14 FOR CFM PROFILE
SELECTION OPTIONS.