Control Box - Lennox XP17-024-230-01 Installation And Service Procedure

HEAT PUMP
CONTROL (A175)
VDC
VAC
ONE YELLOW WIRE FROM PS (E24) TERMINAL ON HEAT PUMP
CONTROL (A175) AND SECOND YELLOW WIRES ON PIGGYBACK
TERMINALS GOES TO S4 HIGH PRESSURE SWITCH.
GREEN
RED
RED
YELLOW
YELLOW
XP17
FAN MOTOR CONTROL (A177) —
PULSE-WIDTH MODULATION (PWM)
BLUE WIRE
24
BLACK WIRE
YELLOW
S4 HIGH PRESSURE SWITCH
HEAT PUMP CONTROL
Figure 10. 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
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GREEN
RED
RED
B4 FAN
MOTOR
BLACK
BROWN
FAN MOTOR
CONTROL
SEE TABLE 8 FOR CFM PROFILE
SELECTION OPTIONS.