7
Cooler — This vessel (also known as the evaporator) is lo-
cated underneath the compressor. The cooler is maintained at
lower temperature/pressure so evaporating refrigerant can re-
move heat from water flowing through its internal tubes.
Condenser — The condenser operates at a higher tem-
perature/pressure than the cooler and has water flowing
through its internal tubes in order to remove heat from the re-
frigerant.
Motor-Compressor — This component maintains sys-
tem temperature and pressure differences and moves the heat-
carrying refrigerant from the cooler to the condenser. Compres-
sor Frames 2-5 are single-stage compressors with one impeller.
Frame E compressors are two-stage compressors with two
impellers.
Control Panel — The control panel is the user interface
for controlling the chiller. It regulates the chiller’s capacity as
required to maintain proper leaving chilled water temperature.
The control panel:
• registers cooler, condenser, and lubricating system
pressures
• shows chiller operating condition and alarm shutdown
conditions
• records the total chiller operating hours
• sequences chiller start, stop, and recycle under micropro-
cessor control
• displays status of motor starter
• provides access to other CCN (Carrier Comfort Net-
work
®
) devices and energy management systems
• Languages that may be pre-installed at factory include:
English, Chinese, Japanese, and Korean.
• International language translator (ILT) is available for
conversion of extended ASCII characters.
Economizer (Optional) — An economizer, along
with a two-stage compressor, allows for higher lift applica-
tions. The economizer is a separate vessel in the flow path after
the condenser that improves the refrigerant cycle by allowing a
small amount of refrigerant to flash into vapor. This phase
change decreases the temperature of the remaining liquid re-
frigerant. The vapor is drawn into the second stage of the com-
pressor, which saves energy because the refrigerant does not
have to be compressed by both stages.
Factory-Mounted Starter or Variable Fre-
quency Drive (Optional) — The starter allows for the
proper start and disconnect of electrical energy for the com-
pressor-motor, oil pump, oil heater, and control panel.
Storage Vessel (Optional) — There are 2 sizes of
storage vessels available. The vessels have double relief valves,
a magnetically-coupled dial-type refrigerant level gage, a 1-in.
FPT drain valve, and a
1
/
2
-in. male flare vapor connection for
the pumpout unit.
NOTE: If a storage vessel is not used at the jobsite, factory-
installed isolation valves on the chiller may be used to isolate
the chiller charge in either the cooler or condenser. An optional
pumpout system is used to transfer refrigerant from vessel to
vessel.
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