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75InRoom Precision AC Tech Data Manual
PART 2 PRODUCT
2.01 STANDARD COMPONENTS
A. CABINET CONSTRUCTION
1. Exterior panels: Shall be 16 gauge steel sheet metal for maximum strength. All exterior
panels and frame are powder coated for durability. Front panels shall have removable hinges
with a locking handle. The side panels are double wall construction with insulation between.
Interior panel wall shall be insulated with 1/2 in (1.5 lb) density fiber insulation. Insulation
shall be completely protected from the air stream by the panel wall or air blocks. Exterior
frame and panel color shall have color values: L = 14.02, a = 0.13, b = 3.68. Main bezel color
shall have color values: L = 13.44, a = 0.43, b = –2.63.
2. Frame: Shall be constructed of welded 16 gauge formed steel for maximum strength.
3. All units shall have full service access from the front, allowing the units to be placed side by
side.
B. ELECTRONICALLY COMMUTATED (EC) FANS
1. Electronically commutated (EC) Fans: The cooling unit shall be equipped with EC fan
modules that have anti-vibration mountings to isolate each fan module from the structure of
the cooling unit. The cooling unit shall be configured with a draw-through air pattern, to
provide uniform air flow over the entire face of the coil.
C. REFRIGERATION COMPONENTS
1. Dual Circuit Refrigeration System: The system shall operate under the coordination of the
main controller. Suction and discharge pressures shall be monitored and electronically
controllable. Each refrigeration system shall consist of a fully-protected scroll compressor,
evaporator coil mounted over an anti-fungal, formed-plastic condensate drip pan, electronic
expansion valve, hot gas bypass valve, filter-drier, sight glass, high pressure switch, and low
pressure switch.
2. Scroll Compressors: The unit shall contain scroll compressors for optimized performance,
efficiency and reliability. The heavy-duty scroll compressors shall be designed for year-round
usage. Scroll compressors shall have Advanced Scroll Temperature Protection (ASTP) to
protect the Scroll Compressor from excessively high discharge gas temperatures. Compressor
crankcase heaters shall be a standard feature for all units with the Scroll Technology.
3. Electronic Expansion Valve: The unit shall contain an electronic expansion valve that is used
to modulate the amount of refrigerant flow within the system. The EEV shall be constructed
of stainless steel with ceramic slide and port parts for highly accurate flow and minimal wear.
EEV has a fast reaction time (1.5 seconds), optimizing saturation of the evaporator coil.