APC ACPDX21-86 User Manual

Air Cooled (DX)
Air cooled systems are not pre-charged from the 
factory and require field refrigerant piping. Each 
installation requires an engineered piping solution. 
APC strongly recommends installation by a highly 
qualified refrigeration contractor to avoid improper 
elevation and long piping runs. The Air Cooled 
system uses refrigerant as the heat transfer medium.  
Room air recirculates through the InRoom unit 
which houses the evaporator coil, scroll compressor, 
and refrigeration system.  A remotely mounted air-
cooled condenser is connected to the unit.  The 
sealed refrigeration circuit will absorb the room heat 
load and reject it to the outside atmosphere. 

•  System used with a remote air cooled condenser
•  Field installed refrigerant piping is required
•  Low maintenance

The MultiCool System is a combination 
of the Air Cooled System and the 
Chilled Water System and contains two 
separate cooling coils.  The controller 
microprocessor manages the MultiCool 
System to allow the air cooled by the Air 
Cooled system to operate as a standby 
system to the Chilled Water (CW) 
system or vice versa, giving the added 
security of  back-up cooling to the 
computer room.

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