Specifications

CHILLER FAMILIARIZATION
(Fig. 1 and 2)
Chiller Information Plate —
The information plate is
located on the right side of the chiller control panel.
System Components — The components include the
cooler and condenser heat exchangers in separate vessels,
motor-compressor, turbine, lubrication package, control panel,
and motor starter. All connections from pressure vessels have
external threads to enable each component to be pressure
tested with a threaded pipe cap during factory assembly.
Cooler — This vessel (also known as the evaporator) is
located underneath the compressor. The cooler is main-
tained at lower temperature/pressure so evaporating refrig-
erant can remove heat from water flowing through its inter-
nal tubes.
Condenser — The condenser operates at a higher
temperature/pressure than the cooler and has water flowing
through its internal tubes in order to remove heat from the
refrigerant.
Motor-Compressor — This component maintains sys-
tem temperature and pressure differences and moves the heat-
carrying refrigerant from the cooler to the condenser.
Turbine — The turbine serves 2 purposes. First, it acts as
the expansion device to separate condenser pressure from
cooler pressure. Second, using the pressure differential be-
tween the cooler and condenser, the turbine converts the
pressure drop to energy and uses this energy to supplement
the compressor motor, thereby reducing the required
horsepower.
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 tem-
perature. 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 micro-
processor control
• displays status of motor starter
• provides access to other CCN (Carrier Comfort Network)
devices
Fig. 1 — 19XRT Identification
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