Abbreviations And Explanations; Chiller Familiarization; Chiller Information Nameplate; System Components - Carrier AquaEdge 19DV series Start-Up, Operation And Maintenance Instructions Manual

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
HMI — Human Machine Interface
I/O — Input/Output
LCDW — Leaving Condenser Water
LCW — Leaving Chilled Water
LED — Light-Emitting Diode
OLTA — Overload Trip Amps
PIC5 — Product Integrated Controls Plus
RLA — Rated Load Amps
SCR — Silicon Controlled Rectifier
SIOB — Starfire 2 Input Output Board
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 ad-
ditional components are referred to as accessories.
CHILLER FAMILIARIZATION (Fig. 1 and 2)
Chiller Information Nameplate —
nameplate is located on the left side of the chiller control panel.
System Components —
clude the cooler and condenser heat exchangers in separate
vessels, motor-compressor, refrigerant, lubrication package,
control panels, PIC5 Touch Screen HMI, economizer, VFD,
and purge system.
This vessel is located underneath the com-
Evaporator —
pressor. The cooler is maintained at lower temperature/pressure
so evaporating refrigerant can remove heat from water flowing
through its internal tubes. Water is flowing through the tube in-
ternals to provide comfort or process cooling.
The condenser operates at a higher tem-
Condenser —
perature/pressure than the evaporator and has water flowing
through its internal tubes in order to remove heat from the
refrigerant. It contains a metering device that regulates the
flow of refrigerant into the economizer.
This chamber reduces the refrigerant
Economizer —
pressure to an intermediate level between the evaporator
and condenser vessels. In the economizer, vapor is separat-
ed from the liquid, the separated vapor flows to the second
stage of the compressor, and the liquid flows into the cooler.
The energy removed from the vaporized refrigerant in the
economizer allows the liquid refrigerant in the cooler to ab-
sorb more heat when it evaporates and benefits the overall
cooling efficiency cycle. It contains a float assembly that
regulates the flow of refrigerant into the evaporator.
®
The information
The main components in-
Motor-Compressor —
tem temperature and pressure differences and moves the
heat-carrying refrigerant from the cooler to the condenser.
The 19DV utilizes a two-stage back to back direct drive
configuration.
A small independent condensing unit
Purge Unit —
with compressor, separator, regenerative carbon filters,
heater and vacuum pump. The purge extracts gas from con-
denser (or from compressor if unit is not in operation) and
purifies it by removing non-condensable gases and any wa-
ter vapor that may be present.
Variable Frequency Drive (VFD) —
able frequency is a voltage source design that converts line
voltage into PWM (pulse width modulating) motor input for
motor speed and torque control.
Refrigerant Lubrication System —
vides lubrication to the compressor bearing by means of a re-
frigerant pump.
Chiller Control Panel —
the input and output boards (IOB), control transformer, relays,
contactors, and circuit breakers. It provides the power distribu-
tion and protection to the electrical components installed on
chiller and has the following functions:
• Communication with PIC5 touch screen
• Communication with purge panel
• Communication with VFD
• Sensor input and outputs
• Actuators control
• Refrigerant pump control
Purge Control Panel —
input and output boards, control transformer, relays, and fuse. It
provides the power distribution and protection to the electrical
components which installed in the purge system and has the
following functions:
• Communication with PIC5 touch screen
• Sensor input and outputs
• Solenoid valve control
• Control of purge compressor, vacuum pump, heater, and fan.
PIC5 Touch Screen HMI —
terface for controlling the chiller and has the following
functions:
• Chiller operation
• Chiller diagnostic
• Chiller status display
• Chiller parameter configuration
• Provide open protocol interface to outside BMS system
4
This component maintains sys-
The VFD vari-
This system pro-
This control panel includes
The purge panel includes the
This panel is the user in-