Evco c-pro nano RACK User Manual download pdf (Page 62)

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

Page 62

Based on the value measured by the discharge probe, the output of the regulator will assume different values.

If the value measured by the probe is less than or equal to the value SP + OFSI, the output of the regulator will

assume the value of 0.

If the value measured by the probe is between the value SP + OFSI and the value SP + OFSI + DI, the output of

the regulator will assume a value that is proportional to the value of the discharge probe.

If the discharge probe assumes a value that is higher than or equal to the value SP + OFSI + DI, the output of

the inverter will assume maximum value.

If the MinI parameter has been set, at every turn-on, the inverter will keep that value as the starting value.

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.

The range of the values that the inverter output may assume lies between 0 and 100 percentage points, with two

decimal numbers.

The use of this adjustment on the main fan is not linked to the adjustment of the other fans, since the two

functions are independent.

6.5.4 Neutral zone adjustment with inverter

This check adds an inverter adjustment to the normal neutral zone adjustment; in order to do this, it is necessary

to set some parameters relative to the inverter device that will be used, besides activating its use.

The parameters relative to the first circuit are the following:

31 SPF1 = Setpoint fans (SP)

32 PF14 = Type of adjustment = 1

33 PG42 = Inverter activation

34 PF26 = Minimum value of inverter (MinI)

35 PF27 = Time of speedUp

36 PF28 = Time or ramp of inverter (TI)

The adjustment varies according to the zone (neutral, turn-on or shutdown) in which the regulator is found.

In the neutral zone, the inverter does not go through any change and no fans are turned on or off.

In the turn-on zone:

9 as soon as it is requested, the inverter is activated.

10 the value of the inverter changes according to the time TI set by the parameter. This represents the time

needed by the ramp of the inverter to go from the minimum value to the maximum value.

11 when the inverter reaches the maximum value, the other fans are requested one by one.

If the turn-on zone remains, all the fans are turned on, one by one, and the value of the inverter stays at the

maximum.

In the shutdown zone:

12 as soon as it is requested, the output of the inverter is brought to the minimum value, depending on the

TI.

13 when the inverter reaches the minimum value, the fans are required to turn off, one by one.

If the request for shutdown remains, all the fans are turned off, one by one, and the value of the inverter stays at

zero.

If the MinI parameter has been set, at every turn-on, the inverter will keep that value as the starting value.

SP + OFSI SP + OFSI + DI

Pressure

Inverter

MinI

100.00 %

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Evco c-pro nano RACK User Manual Page 62

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