Page 21
CBX32MV SERIES
Air Handler Control Button, Display and
Jumpers
Use figure 21 as reference for jumper settings. If any of the
reference 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
setting
show in figure 21)
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 (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
3.
When the solid −" is displayed, the control enters the
applicable mode. Field configuration mode 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:
S
If jumper is installed in
SMART
Humidification
position (Default),
H
terminal is active if heat
demand is present and indoor blower is
running.
S
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 in
Targeted CFM tables
starting on page 25.
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 in
Targeted CFM tables
starting on page 25.
6.
Adjust
− Used to select the indoor blower CFM
adjustment value by placing the jumper in appropriate
position.
S
If
NORM
is selected, indoor blower runs at
normal speeds.
S
If
+
is selected, indoor blower runs at
approximately 10% higher speed than NORM
setting.
S
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 21 for jumper configurations.
Actual CFM values for different air handler sizes are
shown in
Targeted CFM tables
starting on page 25.
7.
Delay
Indoor blower cooling profile, delay for
cooling and heat pump operations.
S
When operating a heat pump, delay profiles 1
and 2 are only applicable.
S
When operating a heat pump, and profiles 3
and 4 are selected, the Air Handler Control will
default to profile 1.
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 21 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%
CFM
COOLING
DEMAND
Delay Profile 2
Cooling Air Conditioner and Heat Pump:
A
B
C
OFF
OFF
100% CFM
100% CFM
COOLING
DEMAND
45 SEC.
A
When cool demand is initiated, motor ramps up to
100% and runs at 100% until demand is satisfied.
