Configuring Unit Size Codes (Model Number) - Lennox CBX40UHV Series Installation And Service Procedure

2. Configuring Unit Size Codes
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
configuration mode, PUSH and
HOLD button next to single
character LED display until dash
symbol appears, RELEASE button.
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 AHC may need to be manually
configured to validate air handler unit size code.
Solid P starts blinking
on single character
LED display.
PUSH and HOLD button to allow AHC to display unit size
code (letter or number) for each different air handler model
for three seconds.

Configuring Unit Size Codes (Model Number)

Yes
(No heating, cooling or indoor fan operation)
_
_
display.
P
P
Figure 34. Configuring Unit Size Codes
AHC in IDLE mode
UNIT SIZE
1. When the correct Unit Sized Code is displayed, RELEASE
push button. Selected code will flash 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, AHC will automatically exit current active mode and
go into IDLE Mode without storing unit size code. If this occurs, then
Unit Size Code configuring procedure must be repeated.
Page 44
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No
Turn room thermostat to
OFF
AIR HANDLER
CODE
MODEL
0
CBX32MV-018/024
1
CBX32MV-024/030
2
CBX32MV-036
3
CBX32MV-048
4
CBX32MV-060
5
CBX32MV-068
6
CBX40UHV-024
7
CBX40UHV-030
8
CBX40UHV-036
9
CBX40UHV-042
L
CBX40UHV-048
U
CBX40UHV-060
YES
NO LED displays correct
Unit Size Code.
Unit enters IDLE
Mode.
CBX40UHV