EVCO c-pro mega RACK - Manual (Page 5)

C-PRO MEGA RACK & C-PRO GIGA RACK APPLICATION MANUAL
Page 5
1 GENERAL INFORMATION
1.1 Description
This application uses C-PRO MEGA and C-PRO GIGA controllers to manage a compressor packs
composed of one, two or three circuits with a maximum number of 8 compressors (if using C-PRO
MEGA controllers) or 12 compressors (if using C-PRO GIGA controllers).
A compressor packs control system is required to manage the compressors in order to maintain the
evaporation pressure at the desired value; more specifically, it must guarantee the production of
cold, for example for the preservation of foodstuffs.
Continuous generation of cold is required for this, using a process which must continue without any
interruptions, except for normal maintenance operations.
The C-PRO MEGA and C-PRO GIGA controllers are dedicated to this process, managing all the
components of the refrigeration circuit, maintaining the required conditions with the greatest
possible efficiency (greater output = lower running costs), with optimal handling of mechanical
components in order to reduce breakdowns (for example, fewer start-ups = less mechanical stress).
Two types of regulation may be selected for controlling pressure or temperature:
⋅
Side Band
⋅
Neutral Zone
Safety devices are managed for each circuit so as to promptly detect any malfunctions. Each safety
device is associated with a particular alarm, which will be triggered in order to identify the type of
fault. The outcome of certain alarms will be to shutdown the relevant mechanical devices, in order
to avoid further faults; others will only indicate the fault, without having any effect on the operation
of the machine.
The application has a navigable user interface, by means of which it is possible to define and set all
configuration and operational parameters. The user interface is subdivided into four main levels:
⋅
User
⋅
Service
⋅
Installer
⋅
System builder
Each level is protected by a separate password. At the system builder level, the user interface
displays a series of modifiable configuration screens (wizards) allowing easy setting of the number
of circuits, compressors, fans and the corresponding safety devices used for the protection of the
mechanical devices. There are also several free-access pages, not password protected, for checking
the operational status of the system at that particular time.
In addition to the aforementioned four levels, there is also a Clock menu (for setting the parameters
associated with the system RTC, such as for example those related to management of the time
bands for variation of the setpoints).
The versions have an integrated 4 x 20 character alphanumeric display, keypad and warning LEDs.
Each version has an optoisolated RS-485 port (for connection to the RICS or other BMS
supervision system) and a non-optoisolated CAN port (for connection to I/O expansion unit).