AAON LC-054 - Manual (Page 16)

16
LC Series chillers have factory installed
louvered sheet metal condenser coil guards.
The placement relative to the building air
intakes and other structures must be
carefully selected. Airflow to and from the
chiller must not be restricted to prevent a
decrease in performance and efficiency.
The installation position must provide at
least 3 feet of side clearance for proper
airflow to the condenser coils. When units
are mounted adjacent to each other, the
minimum clearance required between the
units is 6 feet
Units should not be installed in an enclosure
or pit that is deeper than the height of the
unit. When recessed installation is
necessary, the clearance to maintain proper
airflow is at least 6 feet.
LC Series chillers have a vertical air
discharge. There must be no obstruction
above the equipment. Do not place the unit
under an overhang.
For proper unit operation, the immediate
area around condenser must remain free of
debris that may be drawn in and obstruct
airflow in the condensing section.
Consideration must be given to obstruction
caused by snow accumulation when placing
the unit.
Water Connection
Connect the chiller supply and return water
lines. The connection size is listed on the
unit rating sheet, along with the designed
volumetric flow rate. The maximum
operating pressure for the AAON LC Series
chiller is 125 psi.
Mounting Isolation
For roof mounted applications or anytime
vibration transmission is a factor, vibration
isolators may be used.
Access Doors
Access doors are provided to the compressor
and electrical compartment. A separate
access door is also provided to the
evaporator/heat exchanger compartment.
Low Ambient Operation
During low ambient temperatures, it is
difficult to start a system because the
refrigerant will migrate to the cold part of
the system (condenser) and make it difficult
for refrigerant to flow. All chiller
compressors are provided with factory
installed crankcase heaters. The LC Series
chiller must have continuous power 24 hours
prior to startup. This ensures the compressor
will receive sufficient refrigerant vapor at
startup.
The chiller must be operated with
liquid flowing through the
evaporators.
WARNING
PVC (Polyvinyl Chloride) and CPVC
(Chlorinated Polyvinyl Chloride) are
vulnerable to attack by certain
chemicals. Polyolester (POE) oils
used with R-410A and other
refrigerants, even in trace amounts,
in a PVC or CPVC piping system will
result in stress cracking of the piping
and fittings and complete piping
system failure.
CAUTION