Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
5
Casing
Unit casing is constructed of zinc coated, heavy gauge, and galvanized steel. Exterior surfaces
shall be cleaned, G90 galvanized heavy gauge plate conforming to ASTMA 653, followed by
baked on electrostatic polyester dry powder coat paint on all external panels, completely
weatherized for outdoor installation and properly reinforced and brazed. Salt spray test for steel
sheet under 1,000 hours, specially treated can be up to 2,000 hours and even more (It should
be customized.). Cabinet construction allows for all maintenance on one side of the unit.
Service panels are removed easily and re-installed by removing screws.
Compressor
All the outdoor units have single totally enclosed hermetically scroll compressor - Copeland.
The compressors have internal overload relay. High pressure switch, low pressure switch and
discharge temperature sensor is standard.
Condenser
Internally finned, copper tubes mechanically bonded to a configured hydrophilic aluminum fin
shall be standard. Coils are leak tested at the factory to ensure the pressure integrity. The
evaporator coil is already leak tested to 3,100kPa (450 psig). Anti-corrosion treatment for coils is
optional.
Outdoor fan
The fan is direct driven by weather proof motor (IP44 and insulation class F) to ensure reliable
continuous operation. Statically and dynamically balanced drive motor design with maintenance
– free bearing for outdoor installation. The fan is multi-blade vane-axial type, made of metal
material for quiet operation and durability.
Electrical control box
In the electrical control box with the PCB board, wiring internal to the unit shall be colored and
numbered for simplified identification. The PCB parts can be coated with double-side moisture
proof paint, and the outer side of electric box metal cover is spray-painted (It should be
customized.).
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