Lennox 16B27 Installation Instructions

Page 8
Configuring Unit Size Codes
(Model Number)
Power-up - Unit Size Code (number or letter)
displayed represents unit size code (air handler
model size and capacity). If three horizontal bars
display, Air Handler Control (AHC) does not
recognize unit size code (air handler model size and
capacity).
AHC in IDLE mode
(No heating, cooling or indoor fan
operation)
To enter unit size code
configuration, push and hold
button next to single character
display until dash symbol appears,
then release button.
Turn room thermostat
to OFF
Push and hold button until the solid
P symbol is displayed on the single
character 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.
Solid dash starts blinking
on single character
display.
Solid P starts
blinking on single
character 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.
When the correct unit size code is displayed, release
button. Selected code will flash for 10 second period. During
that period, hold down push button until code stops blinking.
AHC will store code in memory and will automatically exit
the configuration and reset.
Verify that the selected unit size code is correct and
stored by cycling the 24 volt power to the AHC.
(During power-up of the AHC, the single character
display will show the stored unit size code
. If three
horizontal bars display, AHC did not store the unit size
code. If this happens, configuration sequence must
be repeated.
Ye s
No
IMPORTANT: Field replacement controls may need to be
manually configured to validate air handler unit size code.
UNIT SIZE
CODE
A
C
E
F
H
Y
If ten second period expires or push button is held less than
three seconds, AHC will automatically exit configuration
and go into IDLE mode without storing unit size code. If this
happens, configuration sequence must be repeated.
.
AIR HANDLER CONTROL (AHC)
SINGLE
CHARACTER
DISPLAY
PUSH
BUTTON
AIR HANDLER
MODEL
CBA38MV-018/024
CBA38MV-030
CBA38MV-036
CBA38MV-042
CBA38MV-048
CBA38MV-060
FIGURE 11. Congure Unit Size Codes

Lennox 16B27 Specifications

General

Brand	Lennox
Model	16B27
Category	Heat Pump
Language	English