Specifications

5
ABBREVIATIONS AND EXPLANATIONS
Frequently used abbreviations in this manual include:
Words printed in all capital letters or in italics may be
viewed on the International Chiller Visual Controller (ICVC)
(e.g., LOCAL, CCN, ALARM, etc.).
Words printed in both all capital letters and italics can also
be viewed on the ICVC and are parameters (e.g., CONTROL
MODE, COMPRESSOR START RELAY, ICE BUILD
OPTION, etc.) with associated values (e.g., modes, tempera-
tures, percentages, pressures, on, off, etc.).
Words printed in all capital letters and in a box represent
softkeys on the ICVC control panel (e.g., , ,
, , etc.).
Factory-installed additional components are referred to as
options in this manual; factory-supplied but field-installed ad-
ditional components are referred to as accessories.
The chiller software part number of the 19XR unit is located
on the back of the ICVC.
CHILLER FAMILIARIZATION (Fig. 1 and 2)
Chiller Information Nameplate —
The information
nameplate 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, lubrication package, control panel, and mo-
tor 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 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 temper-
ature/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.
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.
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.
REFRIGERATION CYCLE
The compressor continuously draws refrigerant vapor from
the cooler at a rate set by the amount of guide vane opening or
compressor speed (19XRV only). As the compressor suction
reduces the pressure in the cooler, the remaining refrigerant
boils at a fairly low temperature (typically 38 to 42 F [3 to
6 C]). The energy required for boiling is obtained from the wa-
ter flowing through the cooler tubes. With heat energy re-
moved, the water becomes cold enough to use in an air condi-
tioning circuit or for process liquid cooling.
After taking heat from the water, the refrigerant vapor is
compressed. Compression adds still more heat energy, and the
refrigerant is quite warm (typically 98 to 102 F [37 to 40 C])
when it is discharged from the compressor into the condenser.
Relatively cool (typically 65 to 90 F [18 to 32 C]) water
flowing into the condenser tubes removes heat from the refrig-
erant and the vapor condenses to liquid.
The liquid refrigerant passes through orifices into the
FLASC (Flash Subcooler) chamber (Fig. 3). Since the FLASC
chamber is at a lower pressure, part of the liquid refrigerant
flashes to vapor, thereby cooling the remaining liquid. The
FLASC vapor is recondensed on the tubes which are cooled by
entering condenser water. The liquid drains into a float cham-
ber between the FLASC chamber and cooler. Here a float valve
forms a liquid seal to keep FLASC chamber vapor from enter-
ing the cooler. When liquid refrigerant passes through the
valve, some of it flashes to vapor in the reduced pressure on the
cooler side. In flashing, it removes heat from the remaining liq-
uid. The refrigerant is now at a temperature and pressure at
which the cycle began.
CAUTION
WHEN FLUSHING THE WATER SYSTEMS isolate the
chiller from the water circuits to prevent damage to the heat
exchanger tubes.
CCM — Chiller Control Module
CCN — Carrier Comfort Network
®
CCW — Counterclockwise
CW — Clockwise
ECDW — Entering Condenser Water
ECW — Entering Chilled Water
EMS — Energy Management System
HGBP — Hot Gas Bypass
I/O — Input/Output
ICVC — International Chiller Visual Controller
ISM — Integrated Starter Module
LCD — Liquid Crystal Display
LCDW — Leaving Condenser Water
LCW — Leaving Chilled Water
LED — Light-Emitting Diode
OLTA — Overload Trip Amps
PIC II — Product Integrated Controls II
RLA — Rated Load Amps
SCR — Silicon Controlled Rectifier
SI — International System of Units
TXV — Thermostatic Expansion Valve
VFD — Variable Frequency Drive
ENTER
EXIT
INCREASE
QUIT