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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.
Figure 15. System Architecture
UNIT
MASTER
iom-cliv-cf-eng
DAISY CHAIN
MODBUS
COMUNICATION
SLAVE 1
SLAVE 2
24
Unit Controller Operation
The CAREL "APPLICA" app, available on Google Play for the
Android operating system, facilitates parameter configuration and
unit commissioning operations in the field.
SYSTEM ARCHITECTURE
The general architecture of the controls uses the following:
• A μChiller unit controller.
• I/O extension modules as required based on unit configuration.
• Communications interface slave modules.
• The architecture units have a configuration based on a
MASTER unit and unit I/O slaves, these slaves can be
connected via rs485 serial Modbus and can be configured
from the configuration screen.
Tll I/O slave modules can be connected directly or via a wiring
harness.
The order of connection of the slaves can be from left to right or
from right to left, always respecting the master as the main unit.
SLAVE 4
SLAVE IN
SLAVE 3
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