General Description; Abbreviations Used - Carrier SmartVu Control Manual

2. GENERAL DESCRIPTION

2.1. General Description
TM
Carrier® SmartVu control is a control system for controlling Carrier 19 Series chiller which include both
legacy and next generation centrifugal water-cooled chillers. The control system monitors and controls
all operations of the chiller. The control system matches the cooling or heating capacity of the chiller to
the cooling or heating load while providing state-of-the-art chiller protection. The system controls cooling
or heating load within the set point plus and minus the dead band by sensing the water or brine
temperature and regulating the inlet guide vane via a mechanically linked actuator motor and regulating
VFD speed if the compressor is a variable speed compressor. The guide vane is a variable flow pre-whirl
assembly that controls the refrigeration effect in the cooler by regulating the amount of refrigerant vapor
f low into the compressor. An increase in guide vane opening increases capacity. A decrease in guide
vane opening decreases capacity. The control system protects the chiller by monitoring the digital and
analog inputs and executing capacity overrides or safety shutdowns, if required.
TM
Carrier® SmartVu control also gives access to a Control Test function covering all outputs except
compressor relay outputs.

2.2. Abbreviations Used

The f ollowing abbreviations are used frequently:
CCN Carrier Comfort Network
CCN mode Operating mode: CCN
ECDW Entering Condenser Water
ECW Entering Chilled Water
EC/HG Envelope Control
LCDW Leaving Condenser Water
LCW Leaving Chilled Water
LED Light Emitting Diode
LEN Local Equipment Network
(internal communication linking the main board to slave boards)
RLA Rated Load Amps
VFD Variable Frequency Drive
ISM Integrated Starter Module
IOB Input/Output Board
SRDC-UG-2-14-000
19 Series Carrier®
–
TM
SmartVu
Controls IOM
REVISION DATE
2.3 Dec 4, 2020
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