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Configuring Heat Sections on Air Handler Control (AHC)
IMPORTANT: After electric heat strips are installed, the Air Handler Control
(AHC) must be manually configured to detect the number of electric heat
sections. (SEE ALSO 506181-01 for complete configuration guide.)
This procedure is applicable only to the CBX32MV-XX-230-6-06 and higher
and CBX40UHV (all models). To configure the heat strips so that they will be
detected by the thermostat:
•
Power must be applied to the air handler but NOT to the thermostat.
Remove thermostat from base plate or remove wires to thermostat at
the air handler.
•
On the air handler control (AHC), unit should be in idle mode (decimal
blinks at 1 Hertz—0.5 second ON, 0.5 second OFF.
•
Select field test mode—touch and hold the push button until solid "–"
appears; release button. Display will blink.
•
Press the push button and wait for the display LED to show "H" (capital
H), then release the button.
•
The AHC cycles the indoor blower motor "on" to the selected heat
speed and stages the electric heat relays "on" and "off" to automatically
detect the number of electric heat sections. The AHC stores the
number of electric heat sections, then automatically exits "Field Test
Mode".
•
At this point, the iComfort Wi‐Fi
information stored in the AHC.
507341-02
®
will now detect the heat strip
FUSE
3 AMP
XFMR 24V
24 VAC
COM
3
2
1
P8
4
6
5
9
8
7
XFMR LINE
L2
L1
INDOOR
G
L2 L1
BLOWER
POWER
EARTH
INDOOR BLOWER
SIGNAL
4
5
6
1
2
3
I + I −
LINK
PUSHBUTTON
46
HEAT
HUMIDITROL
1 2 3 4
C
DH
COOL
HUMIDIFICATION
1 2 3 4
SMART
AUTO
EVENHEAT
DELAY
1 2 3 4
BLOWER
ADJUST
ONLY CFM
NORM
+
−
1 2 3 4
A92
INTEGRATED
CONTROL
R
I + I −
C
OUTDOOR
R
I + I −
C
OUTDOOR UNIT
AIR SENSOR
THERMOSTAT
LED
DS
O
L
H
DH
R
C
Y1
Y2
G
W3
W2
W1
DISCHARGE
AIR SENSOR
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