Specifications
SMX Series Controls
For Modulating Air Conditioning Systems
SMX II Key Benefits
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Works with SMXir Keypad/Display.
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Works with SMXir Remote.
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Automatic/Manual Fan Speed Control.
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Inside Temperature Display.
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Auxiliary Heat Control.
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Dehumidication (absent) Program.
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Nonvolatile Memory.
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Fault Display.
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Brightness Control.
SMX II Programmable Functions
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Factory Memory Reset
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Fahrenheit/Celsius Display
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High Fan Speed Adjustment
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Low Fan Speed Adjustment
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Setpoint Differential
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Fan Response Differential
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Continuous/Intermittent Fan
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Temperature Calibration
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Dehumidication Cycle
ISO 9001:2000
L–0956 Rev. 20080829
Modulating System Controls
Each cooling unit in a modulating system requires its own separate control. There
are two control options; the SMX II microprocessor control system or a 3-knob
electromechanical switch assembly.
SMX II Control System
The following components are required for each cooling unit: PLHMX-HV
power/logic module, SMXir keypad/display, CXP connection cable, and a TSEP
temperature sensor.
The power/logic module includes a 3 ft (.9m) wire harness to connect to the
cooling unit junction box. The CXP cable, available in many different lengths,
connects the SMXir keypad to the P/L module. The TSEP temperature sensor,
also available in different lengths, plugs into the P/L module and the sensor bulb is
installed in the return air path of the cooling unit.
The SMXir keypad/display has an attractive, compact housing and includes a
mounting plate for easy surface-mount installation. A large, easy-to-read LED
display shows cabin temperature, setpoint, programming prompts, and fault code
warnings. Small LED’s and backlit text indicate system status. Under a decorative
hinged door is the familiar SMX 10-button arrangement with clearly labeled keys
for single-keystroke operation. An optional infrared remote control is available that
allows system adjustments to be made remotely.
SMXir Keypad/Display
with Remote Control
(Continued on reverse side)
Controls 55