EVCO c-pro nano CHIL - Manual (Page 6)

C-PRO NANO CHIL AND C-PRO MICRO CHIL – APPLICATION MANUAL
Pag. 6
1 General Information
1.1 Description
C-PRO NANO CHIL and C-PRO MICRO CHIL are two new families of innovative programmable
controllers, which are both flexible and modular, as well as being capable satisfying all application,
technical and cost requirements of modern single and twin-circuit chillers, with capacity from 4 to
450 KW and up to 6 compressors.
The features of the C-PRO NANO and MICRO CHIL controllers – contained size, I/O availability,
price, etc. – enable, for the very first time, the use of programmable devices even in low-complexity
machines such as chillers - heat pumps with a single circuit, capacity from 4 to 80 KW and up to 3
compressors, where until recently it had only been possible to utilise rigid parameter-based
controllers. By connecting to a C-PRO NANO and MICRO CHIL the C-PRO EXP MICRO I/O
expansion, the advantages in control and price offered by the use of these programmable devices
are also extended to twin-circuit units up to 450 KW and 6 compressors.
The display on these products consists of a 4-digit LED display, with function icons, available in
both product families.
The C-PRO NANO and MICRO CHIL controllers feature:
•
9 inputs, three of which are analogue inputs (2 for NTC temperature probes and 1 for
pressure transducers
0-20 / 4-20 mA or for ratiometric transducers, 0-5 V), 5 are digital and 1 is analogue/digital
(i.e. configurable);
•
9 outputs, of which 3 are analogue (one PWM and two 4-20 mA or 0-10 V) and 6 are digital
(electromechanical relays); analogue outputs enable control of inverters for compressors and for
phase-cut speed regulators for fans.
Using the C-PRO EXP MICRO I/O expansion, I/O is doubled.
Thanks to their design and installation features, these controllers are easily installed – the C-PRO
NANO is panel-mounted, while the C-PRO MICRO is DIN-rail-mounted on an electrical board.
Using the EVKEY programming key, it is possible to upload/download parameters; in addition,
these controllers can be connected to RICS monitoring and supervisory systems.
The application software is created with UNI-PRO and is capable of managing air-to-air, air-to-
water, water-to-water and motocondensing units.
The following are only some of the numerous control functions available:
•
free-cooling management
• pump-down management
• dynamic set point compensation
• double set-point that can be enabled from external contact
• possibility of managing up to 3 scroll compressors for each circuit
• possibility of managing compressors with inverter and fans with phase-cut module
• control of condensing pressure / linear or stepped evaporation
• operation as heat pump only
• activation of compressors from motocondensing machine input
• operation as heat pump with low external temperature
• version with one, two or no circulating pumps.