Instruction Manual

C-PRO NANO RACK AND C-PRO MICRO RACK APPLICATION MANUAL

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GENERALITIES

1.1 Description

This application uses control units of C-PRO NANO and C-PRO MICRO line for management of a refrigerator

compressor pack composed by one or two circuits with maximum number of 4 compressors.

The function required to a refrigerator compressor pack’s control system is the management of the compressors

for the maintenance of the evaporation pressure up to the wished value; in deeper words it must assure the

production of cold, for example for foodstuffs’ conservation.

Therefore it is required the continuous generation of cold through an action that must take place without

interruptions, unless for normal maintenance operations.C-PRO NANO and C-PRO MICRO control units are

extremely careful to these aspects managing all the circuit’s parts with the best possible efficiency (better

efficiency output = less operation costs), handling the mechanical tools in the best way, for breakdown

reduction (for example less trimming = less mechanical stress). For the control of pressure or temperature it is

possible to choose between two setting types:

⋅ Sideband

⋅ Neutral zone

For each circuit the safeties are managed in order to signalize promptly the possible malfunctions. To each

safety it is associated a particular alarm that will be signalized in order to identify the type of breakdown. Some

alarms will consequently block the mechanical devices in order to avoid further breakdown. Other alarms, as a

result, will only signalize without taking any measure over the machine’s operation.

The application has a navigable user inteface whereby it is possible defining and setting all the configuration

and operation parameters divided into four main levels:

⋅ User

⋅ Maintenance operative

⋅ Installer

⋅ Contructor

Each level is protected by a different password. On contructor’s level the user inteface displays a range of

editable configuration templates (wizard) that allow to set easily the number of circuits, compressors, fans and

the respective safeties that we want to use in order to protect the mechanical devices.

There is always a TTL output for the connection to RICS supervision system (through aTTL/RS-485 user

interface) or to other BMS.