Unit Size Code - Lennox 16B27 Manuallines

u s c
nit ize ode
Power-up — Unit Size Code (number or letter) displayed represents unit size code (air handler model size and capacity).
If three horizontal bars display, then Air Handler Control (AHC) does not recognize unit size code.
To enter unit size code
con guration mode ; PUSH and
HOLD button next to single
character LED display until dash
symbol appears, RELEASE
Solid dash starts blinking
on single character LED
PUSH and HOLD button until the solid P
symbol is displayed on the single
character LED display, then RELEASE
button. This mode allows the user to
select a unit size code (number or letter)
that matches the air handler model size
and capacity.
IMPORTANT — Field replacement controls may need to be
manually configured to validate air handler unit size code.
Solid P starts
blinking on single
character LED
PUSH and HOLD button to allow AHC to display unit size
code (letter or number) for each di erent air handler model
for three seconds.
Con guring Unit Size Codes (Model Number)
Yes
(No heating, cooling or indoor fan operation)
button.
display.
display.
Figure 7. Configure Unit Size Codes
AHC in IDLE mode

UNIT SIZE CODE

0
1
2
3
4
5
6
7
8
9
L
U
A
C
E
F
H
Y
1. When the correct Unit Size Code is displayed, RELEASE
push button. Selected code will ash for 10 second period.
2. During that 10 second period, HOLD push button until code
stops blinking (three seconds minimum).
3. Air Handler Control will store code in memory and exit current
active mode. LED display will go blank and then the Unit Size
Code will display for 2 to 5 seconds.
NOTE - If 10 second period expires, or push button is held less than
three seconds, control will automatically exit current active mode
and go into IDLE Mode without storing unit size code. If this occurs,
then Unit Size Code
Page 20
No
Turn room thermostat to OFF. If connected to iComfort control
system, remove R, i+, i- and C wired from the control board.
AIR HANDLER MODEL
CBX32MV-018/024
CBX32MV-024/030
CBX32MV-036
CBX32MV-048
CBX32MV-060
CBX32MV-068
CBX40UHV-024
CBX40UHV-030
CBX40UHV-036
CBX40UHV-042
CBX40UHV-048
CBX40UHV-060
CBA38MV-018/024
CBA38MV-030
CBA38MV-036
CBA38MV-042
CBA38MV-048
CBA38MV-060
con guring procedure must be repeated.
YES
LED displays correct
NO
Unit Size Code .
Unit enters IDLE
Mode .