Lennox XC21 Series User Manual

Page 44
XC21
MAIN CONTROL
(A175)
CONTROL PANEL
FAN MOTOR CONTROL (A177) 
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 15 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
FAN MOTOR
CONTROL
YELLOW
BLACK
YELLOW
BLUE
SEE TABLE 15 FOR CFM PROFILE
SELECTION OPTIONS.
YELLOW
YELLOW
YELLOW
HIGH PRESSURE SWITCH (S4)
YELLOW
FAN MOTOR
(B4)
MAIN CONTROL (A175)
Figure 22. Fan Control, Wiring, Jumper Settings, Testing and LED Location  XC21−XXX−230−05 AND LATER

Lennox XC21 Series Specifications

General

SEER Rating	Up to 21.00
Sound Rating	As low as 69 dB
Energy Star Certified	Yes
Refrigerant	R-410A
Cooling Capacity	2 to 5 tons
Warranty	10-year limited warranty on compressor and covered components