iom-cliv-eng
www.comfort-flex.com
28
Unit Controller Operation
GENERAL DESCRIPTION
μChiller is Carel’s solution for the complete management of chiller
units, air-to-water heat pumps, water-to-water heat pumps and
motor condensing units. In addition, this solution allows the field
replacement of μchiller2 and μchiller2 SE with the new product
(hereinafter referred to as Legacy model).
The maximum configuration manages 2 compressors per circuit
(*)1 and up to a maximum of 2 circuits (thanks to the use of an
expansion card for circuit 2).
The distinctive element of μChiller is the complete control of
high efficiency units thanks to the integrated management of
the electronic valve (ExV) and BLDC brushless compressors,
ensuring increased compressor protection and reliability and high
unit efficiency.
The user terminal allows wireless connectivity with mobile devices
and is integrated on panel-mounted models and purchased
separately on DIN rail-mounted models.
SYSTEM ARCHITECTURE
The general architecture of the controls uses the following:
• A unit controller.
• I/O extension modules as required based on unit configuration.
• Communications interface son modules.
• The architecture units have a configuration based on a
mother unit and unit I/O sons , these sons can be connected
via rs485 serial Modbus and can be configured from the
configuration screen.
Tll I/O son modules can be connected directly or via a wiring
harness.
The order of connection of the sons can be from left to right or
from right to left, always respecting the master as the main unit.
Figure 16. System Architecture
The CAREL “APPLICA” app, available on Google Play for the
Android operating system, facilitates parameter configuration and
unit commissioning operations in the field.
