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Installation, Operation & Maintenance
AXM Control
The WDG Air handler is equipped with a communicating
AXM board to allow communication with the communicating
compressor section (HTS) and communicating thermostat.
The AXM control allows either 4-wire connection with
Communicating DXM2 board and Communicating Thermostat.
It can also be connected to a non-communicating thermostat
and compressor section using up to 9-wires (plus additional if
functionality requires). Please see Thermostat section for more
details.
AXM Connections
Fan Connections
Electric Heat
Connections
9-wire connection to non-
communicating thermostat/
compressor section
Low Air Temperature Sensor Installation
WDG Air Handlers are shipped with LT2 (Low Air Temperature)
sensor installed in the Air Handler (Figure 3) and connected to the
AXM control. No additional action required (do not clip the VIO
wires).
Test Button
The test button puts the AXM into test mode, which bypasses the
soft start ramping profi le and the blower immediately ramps up to
the nominal target speed.
FIELD SELECTABLE INPUTS
DIP SWITCHES
Note: In the following fi eld confi guration options, DIP switches
should only be moved when power is removed from the DXM2
Control to ensure proper operation.
AIR HANDLER SERIES
LT2
Condensate
Sensor
Sensor
Accessory
outputs
that track
blower
operation
4-wire
connection
to DXM2
4-wire connection to
communicating thermostat
DIP #2: Dehumidifi cation Mode - Provides selection of normal or
Dehumidifi cation Fan Mode. In Dehumidifi cation Mode, the fan
speed will be adjusted for Cooling. In Normal Mode, the fan speed
will be normal during Cooling.
On = Normal Fan Mode. Off = Dehumidifi cation Mode
Rest of the DIP switches are not used.
ACCESSORY CONNECTION / CONFIGURATION
2 Accessory outputs on AXM board only track blower operation.
Other accessories are connected to the DXM2 board. Please refer
to DXM2 AOM for more details.
13
Heat Controller, Inc.
Installation
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