Feature - Mars Comfort-Aire Century VCD-SA Series Service Manual

1. Feature

1.1 Full Multi-position installation
• This AHU is capable of upflow, downflow, horizontal left, or horizontal right configurations.
1.2 Installation Convenience
• It simplifies the airflow volume adjustment process and saves lots of installation efforts. The traditional adjustment
method needs the installers to manually set the motor speed, according to the installation instruction and ducting
design. It takes lots of time if this thing doesn't go well and decreases the marginal profits.
1.3 Easy Fault Code Checking
• Thanks to advanced mutual data communication technology, the AHU system can intelligently self-detecting the
failure cause and generate a corresponding code.
• Installer or user can easily check the fault code displayed on the electric function board by just opening the lid.
• It helps you proactively determine the failure cause, prepare for repairing parts ahead of field maintenance work,
greatly improve the work efficiency.
1.4 Nitrogen Charge and Leakage Check Valve
• Midea AHU indoor unit is standard with Nitrogen injection to maintain positive pressure of the indoor unit. It is easy
to check from the check valve whether there is leakeage in the evaporator or not.
1.5 Automatic Airflow Adjustment
• During the operation, when the dust filter or evaporator is clogged with dust, the load of the system and motor
torque increases. The MPU(microprocessor) on the unit can detect this change and adjust the fan speed to keep the
CFM stable.
IDU-Air Handler 2
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Service Manual - VCDxxSA
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