Page 31
CBX32MV
Air Handler Control Button, Display and
Jumpers
Use Figure 19 as reference for jumper settings. If any of the
referenced jumpers are missing, the Air Handler Control
will display Error Code
130
as per Table 10, and the Air
Handler Control will automatically use the
factory default
settings shown in Figure 19)
IMPORTANT
Before changing any clippable links or jumper settings,
make sure the motor has completely stopped. Any
changes will not take place while the motor is running.
PUSH BUTTON
An on-board push button is provided for the purpose of
placing the Air Handler Control in different operation modes
and can be used to recall stored error codes. When button
is pushed and held, Air Handler Control will cycle through a
menu of options depending on current operating mode.
Every three seconds a new menu item will be displayed. If
the button is released while that item is shown on the
display, Air Handler Control will enter displayed operating
mode, or execute defined operation sequence for that
menu option. Once all items on menu have been displayed
the menu resumes from the beginning (if button is still held).
1.
Press the diagnostic push button and hold it to cycle
through a menu of options. Every five seconds a new
menu item will be displayed. Release the button when
the desired mode is displayed.
2.
When the solid “E” is displayed, the control enters the Error
Code Recall mode. Error Code Recall mode menu options:
No change
3.
(displaying error history) remains in Error Code Recall mode;
solid “
” exits Error Code Recall mode; and solid “c” clears the
error history. Must press button while flashing “c” is displayed
to clear error codes
4.
When the solid “-” is displayed, the control enters the error
recall mode. The error recall menu options: Solid “C” starts
pressure switch calibration; blinking “-” exits current active
mode.
JUMPERS
Jumpers are used for non-communicating mode only.
1.
Humidification
— Controls the status of
H
terminal on
the thermostat block.
Configurations are as follows:
If jumper is installed in
SMART
Humidification
position (Default),
H
terminal is active if heat
demand is present and indoor blower is running.
If jumper is installed in
AUTO
Humidification
position,
H
terminal is energized whenever
indoor blower is running.
2.
EvenHeat
— Target Discharge Air Temperature
selection is used to set discharge air temperatures for
EvenHeat operation.
NOTE -
Optional Discharge Air Temperature Sensor,
Lennox Catalog # 88K38 is REQUIRED for EVENHEAT
operation and must be ordered separately.
3.
Blower Only CFM
— Used to select Indoor blower
CFM for continuous operation.
4.
Heat
— Used to select Indoor blower CFM for electrical
heat by placing the jumper in proper position. Actual
CFM values for different air handler sizes are shown
starting on page 3.
5.
Cool
— Used to select cooling indoor blower CFM by
placing the jumper in proper position. Actual CFM
values for different air handler sizes are shown starting
on page 3.
6.
Adjust
- Used to select the indoor blower CFM
adjustment value by placing the jumper in the
appropriate position.
If
NORM
is selected, indoor blower runs at
normal speeds.
If
+
is selected, indoor blower runs at
approximately 10% higher speed than NORM
setting.
If
-
is selected, indoor blower runs at
approximately 10% lower speed than NORM
setting.
If the jumper is missing, the Air Handler Control will
activate the
Configuration Jumper is Missing
alarm in
and will automatically use the default factory setting in
Table 10. See Figure 19 for jumper configurations.
Actual CFM values for different air handler sizes are
shown starting on page 3.
7.
Delay
— Indoor blower cooling profile, delay for
cooling and heat pump operations.
For heat pump
heating
operation only delay
profiles 1 and 2 are applicable. If profiles 3 or 4
have been selected, heat pump operation will
use profile 1 only.
For heat pump
cooling
operation all 4 profiles
are operational.
If the jumper is missing, the Air Handler Control will
activate the
Configuration Jumper is Missing
alarm and
will automatically use the default factory setting in Table
10. See Figure 19 for jumper configurations.
Delay Profile 1
A
When cool or heat demand is initiated, motor
ramps up to 100% and runs at 100% until demand
is satisfied.
B
Once demand is met, motor ramps down to stop.
A
B
OFF
OFF
100
%CF
M
COOLING
DEMAND
