Evco c-pro nano RACK User Manual download pdf (Page 63)

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

Page 63

If the parameter for the speedUp time has been set, at every breakaway, the inverter will assume the maximum

value for the seconds described by this parameter.

6.5.5 Single condensation (only bi-circuit)

Single condensation makes it possible to perform the ventilation process through only one circuit. For this

input, it is possible to set the type of resetting (automatic or manual) through the parameters.

By setting the parameter PG30 single condensation activation, the number of circuits for the fans is forced to

one, while the number of circuits chosen for the compressors remains unchanged.

The single condensation will deactivate all the characteristics (alarms, fans, inverter,…) that are relative to the

second circuit for the management of the fans.

6.6 Management of the fans

The program is able to manage up to a maximum of 4 fans. To each fan, a digital safety input and a digital turn-

on/shutdown output may be associated.

The main configuration parameters are the following:

- PG01 = Number of circuits

- PG41 = Number of fans circuit 1

- PG45 = Number of fans circuit 2

- PG32 = Activation fan safety

The number of fans that are directly controlled by the digital output is further limited by the number of

compressors (throttled or not), which means by the number of digital outputs remaining after the configuration

of the compressors.

It is possible to use a single condensation, which is a condensation only on one circuit, by setting the relative

PG30 parameter.

The management of the fans occurs through a setPoint and a differential that can be set by a parameter and the

reading of a pressure on the discharge probe. Turn-on/shutdown is ensured by a thermo-adjustment and by

several timings that protect the various breakaways.

6.6.1 Rotation of the fans

The rotation of the fans is a procedure that makes it possible to balance as much as possible the number of

hours of operation and of breakaways for every device.

The rotation does not involve any fans in a state of alarm or in manual mode and it makes it possible to

dynamically turn on others if one or more of them go into a state of alarm.

Using the PF01 parameter, the program is able to manage 4 types of rotation: FIFO, LIFO, FIFO + hours, LIFO

+ hours.

1) FIFO

It follows the “First In First Out” logic, which means the first fan turned on will be the first one that will have

to shut down. This logic could initially lead to a large difference in the hours of operation among the various

fans, but after an initial phase, these will almost be the same.

Example.

Turn-on : F1 . F2 . F3 . F4

Shutdown: F1 . F2 . F3 . F4

This type of rotation has a peculiarity in the case where all the fans configured in the system do not turn-on; in

fact, if, for instance, the first fan is turned on and then it shuts down, the next fan to be turned on will be the

second. The last fan turned off is memorized in order to turn on the next fan in the sequence, so that the same

fan is not used, taking advantage in this way of all the configured condenser items.

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Evco c-pro nano RACK User Manual Page 63

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