Dixell XWEB5000 Manual de usuario descargar pdf (Pagina 5)

Limiting electrical usage by items such as fork lifts, lights or signs only to times when it’s really necessary is

important for the energy saving. This is why Dixell considers time scheduling so essential for some devices. They

are allowed to use electrical power only when it is convenient. Dixell’s instruments are equipped with a

scheduler function that allows, besides an intelligent management of all plant events, also to make

a scheduled maintenance of the plant ﬁrst of all deﬁning the machines or the counters that

have to be deactivated. It is also possible to check the set point value that can be modiﬁed

depending on devices requirements thanks to the CRO function, and easy discovery of

any technical problems using the statistics management.

The connection to the modern supervising systems (of Dixell) allows, thanks to

the special CRO algorithm (Compressor Rack Optimization), to manage

the compressor rack set point in the best possible way, depending on

the devices connected, resulting in plant optimization and energy

saving. The system, equipped with the CRO function, analyzes the

information from the controller to determine if a controller needs

more refrigeration power and how much. The set point will be re-

calculated in order to satisfy the worse instance and sent from the

supervising system to the XC1000D compressor rack controller;

this will be the new working set point. If the supervising system

can’t manage the XC1000D, it’s the controller that “decides” to

replace the set point (coming from the system) and will then

deﬁne the set point in the program phase. The 2 graphs emphasize

that when the CRO algorithm is active, in a real installation, the

set point becomes on average higher, and consequently the energy

consumption decreases. The dotted line represents the average

weekly value.

…SYSTEMS

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Dixell XWEB5000 Manual de usuario Pagina 5