Abbreviations And Explanations; Chiller Familiarization (Fig. 1 And 5); Chiller Information Nameplate; System Components - Carrier AquaEdge 19XR Series Start-Up, Operation And Maintenance Instructions Manual

CAUTION
Be aware of electrostatic discharge (static electricity) when
handling or making contact with circuit boards or module con-
nections. Always touch a chassis (grounded) part to dissipate
body electrostatic charge before working inside control center.
Use extreme care when handling tools near boards and when
connecting or disconnecting terminal plugs. Circuit boards can
easily be damaged. Always hold boards by the edges and
avoid touching components and connections.
This equipment uses, and can radiate, radio frequency energy.
If not installed and used in accordance with the instruction
manual, it may cause interference to radio communications.
The PIC 6 control boards have been tested and found to com-
ply with the limits for a Class A computing device pursuant to
International Standard in North America EN 61000-2/3 which
are designed to provide reasonable protection against such in-
terference when operated in a commercial environment. Oper-
ation of this equipment in a residential area is likely to cause
interference, in which case the user, at his own expense, will
be required to take whatever measures may be required to cor-
rect the interference.
Always store and transport replacement or defective boards in
anti-static shipping bag.
CAUTION
WHEN FLUSHING THE WATER SYSTEMS isolate the
chiller from the water circuits to prevent damage to the heat
exchanger tubes.

ABBREVIATIONS AND EXPLANATIONS

Frequently used abbreviations in this manual include:
CCN — Carrier Comfort Network
ECDW — Entering Condenser Water
ECW — Entering Chilled Water
EMS — Energy Management System
HGBP — Hot Gas Bypass
HMI — Human Machine Interface
I/O — Input/Output
ISM — Integrated Starter Module
LCDW — Leaving Condenser Water
LCW — Leaving Chilled Water
LED — Light-Emitting Diode
OLTA — Overload Trip Amps
PIC 6 — Product Integrated Controls 6
RLA — Rated Load Amps
SCR — Silicon Controlled Rectifier
TXV — Thermostatic Expansion Valve
VFD — Variable Frequency Drive
Factory-installed additional components are referred to as options
in this manual; factory-supplied but field-installed additional com-
ponents are referred to as accessories.

CHILLER FAMILIARIZATION (Fig. 1 and 5)

Chiller Information Nameplate

The information nameplate is located on the right side of the
chiller control panel.

System Components

The components include cooler and condenser heat exchangers in
separate vessels, motor-compressor, lubrication package, control
panel/HMI, power panel, economizer, and motor starter or VFD.

Cooler

This vessel (also known as the evaporator) is located underneath
the compressor. The cooler is maintained at lower temperature/
pressure so evaporating refrigerant can remove heat from water
flowing through its internal tubes.
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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 system temperature and pressure dif-
ferences and moves the heat- carrying refrigerant from the cooler
to the condenser. The 19XR compressor frames 2, 3, 4, and 5 are
single-stage compressors with one impeller. Frame C, E, 6, and 7
are two-stage compressors with two impellers.

Control Panel

The control panel includes the Carrier PIC 6 HMI touchscreen. It
allows 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 Network
devices and energy management systems
• supports languages that may be preinstalled at factory, in-
cluding English, Chinese, Korean, Italian, Japanese,
French, and German.

Power Panel (19XR2-E)

The power panel contains oil heater and oil pump contactors, as
well as the envelope control/HGBP relay if specified. The power
panel also contains transformers T1/T2 for 24 VAC control power,
as well as the low voltage starter interlock and communication ter-
minals.

Power Panel (19XR6/7)

The control panel contains both power components for heaters, oil
pump and electrical actuators as well as low voltage control com-
ponents. They are separated by a barrier.

Economizer (if available)

This chamber reduces the refrigerant pressure to an intermediate
level between the cooler and condenser vessels. In the economiz-
er, vapor is separated from liquid, the separated vapor flows to the
second stage of the compressor, and the liquid flows into the cool-
er. The energy removed from the vaporized refrigerant in the
economizer allows the liquid refrigerant in the cooler to absorb
more heat when it evaporates and benefits the overall cooling effi-
ciency cycle.

Free-Standing/Factory-Mounted Starter or VFD

The starter or VFD allows for the proper start and disconnect of
electrical energy for the compressor-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
connection for the pumpout unit.
NOTE: If a storage vessel is not used at the jobsite, factory in-
stalled isolation valves on the chiller may be used to isolate the
chiller charge in either the cooler or condenser. An optional pum-
pout system is used to transfer refrigerant from vessel to vessel.
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/ -in. male flare vapor
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