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Lennox XC21 User Manual

Lennox XC21
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Page 45
XC21 SERIES
A175 MAIN
CONTROL
CONTROL PANEL
A177 FAN MOTOR CONTROL 
PULSE−WIDTH MODULATION (PWM)
JUMPER
OFF
JUMPER
ON
J2
LED
CFM Profile Pin Select
VERIFY DC VOLTAGE OUTPUT USING FAN PWM OUT AND
COM TERMINALS. SEE TABLE 16 FOR OPTIMAL DC
VOLTAGE BASED ON CFM PROFILE USED.
COM
FAN PWM OUT
FAN PWM OUT
PARK
COM
J2
GREEN
RED
BROWN
RED
BLACK
RED
RED
GREEN
A177 FAN
MOTOR
CONTROL
YELLOW
BLACK
YELLOW
BLUE
SEE TABLE 16 FOR CFM PROFILE
SELECTION OPTIONS.
YELLOW
YELLOW
YELLOW
S4 HIGH PRESSURE SWITCH
YELLOW
B4 FAN
MOTOR
A175 MAIN CONTROL
Figure 24. A177 Fan Control, Wiring, Jumper Settings, Testing and LED Location

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Engineering Data36 pages

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Lennox XC21 Specifications

General IconGeneral
SEER Ratingup to 21.00
Sound Ratingas low as 69 dB
RefrigerantR-410A
Energy Star CertifiedYes
Compressor TypeTwo-Stage
Cooling Capacity (BTU/h)24000-54000
Warranty10-Year Limited Warranty on compressor

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