507746-01
Issue 1821
Page 30 of 39
Figure 21. Configure Unit Size Codes
Configuring Unit Size Codes (Model Number)
Power-up
— Unit Size Code (number or letter) displayed represents air handler model and capacity. If three horizontal
bars are displayed, then Air Handler Control (AHC) does not recognize unit size code.
Air handler control in
IDLE
mode
(No heating, cooling or indoor fan operation)
To enter
unit size code
configuration mode
;
PUSH
and
HOLD
button next to single
character LED display until
dash
symbol appears.
RELEASE
button.
Turn room thermostat to
OFF
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.
Solid
dash
starts blinking
on single character LED
display.
Solid
P
starts
blinking on single
character LED
display.
PUSH
and
HOLD
button to allow air handler control to
display unit size code (letter or number) for each air
handler model for three seconds.
Yes
No
IMPORTANT —
Field replacement controls may need to be
manually configured to validate air handler unit size code.
P
P
1.
When the correct
Unit Size Code
is displayed,
RELEASE
push button. Selected code will flash for 10 seconds.
2.
During 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
configuring procedure must be repeated.
LED displays correct
Unit Size Code
.
Unit enters
IDLE
Mode
.
YES
NO
-
-
≡
UNIT SIZE
CODE
AIR HANDLER
MODEL
UNIT SIZE
CODE
AIR HANDLER
MODEL
1
BCS2M24V
A
BCE7S24M
2
BCS2M36V
C
BCE7S30M
3
BCS2M42V
E
BCE7S36M
4
BCS2M48V
F
BCE7S42M
5
BCS2M60V
H
BCE7S48M
6
BCE4M24S
Y
BCE7S60M
7
BCE4M30S
8
BCE4M36S
9
BCE4M48S
L
BCE4M60S
