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AIR COOLED DIRECT EXPANSION UNITS (DXA)
the air cooled DX units extract heat from the room and transfer it to
the outside using air cooled refrigerant heat exchangers (condensers).
the room unit and external condenser form an autonomous sealed
circuit once installed. the trAne remote condensers used with
JUPiter units include a precise electronic system to regulate the fan
speed to ensure trouble-free operation throughout the year under a
wide range of external air temperatures. Special attention has been
paid to the acoustic design of the condensers to minimise noise
levels. A wide range of combinations is available to meet different site
requirements.
WATER COOLED DIRECT EXPANSION UNITS (DXW)
in the DX water cooled units, the heat extracted from the room is
transferred to water via a stainless steel brazed plate exchanger within
the unit.
the cooling water may be fed from the mains supply or a well (open
circuit), or recycled in a closed loop cooled by external coolers.
in the latter case, an anti-freeze mixture of water and ethylene glycol
is normally used.
the water cooled units have the advantage that the refrigerant
circuits are charged and sealed in the factory. this makes installation
extremely simple, eliminating the need for any site-installed refrigerant
pipework.
Operating description
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