EVCO c-pro mega RACK - Manual (Page 88)

C-PRO MEGA RACK & C-PRO GIGA RACK APPLICATION MANUAL
Page 88
If the value measured by the probe is between the value of SP + OFSI and the value of SP + OFSI +
ID, the regulator output will assume a value proportional to the supply probe value.
In the case where the supply probe assumes a value greater than or equal to the value of SP + OFSI
+ ID, the inverter output will assume the maximum value.
In the case where the parameter MinI has been set, then with each switching on, the inverter will
maintain that value as the starting value.
Where the speedUp time parameter is greater than zero, with each startup, the inverter will assume
the maximum value for the number of seconds described by this parameter.
The range of values the inverter output may assume is comprised of between 0 and 100 percentage
points, with two decimal places.
By enabling the inverter, for a given number of fans, one step is lost, which will be replaced by
regulation with inverter on the first fan.
Below is given an example of how to change regulation with the presence of an inverter.
6.5.4 Neutral zone regulation with inverter
This type of control introduces inverter control to normal neutral zone control, and in order to do
this it is essential to set several parameters relating to the inverter device it is intended to use, in
addition to enabling its use. The parameters in question are the following:
⋅
Inverter enabling
⋅
Minimum inverter value (MinI)
⋅
Inverter time (IT)
⋅
SpeedUp time
⋅
Neutral zone supply SetPoint
Regulation varies according to the zone (neutral, on or off) in which the regulator is located.
In the neutral zone, the inverter undergoes no changes and the fans are neither switched on or off.
In the on zone:
⋅
the inverter is activated as soon as requested.
⋅
the inverter value varies according to the time TI set by the parameter. This represents the
time required for the inverter ramp to change from the minimum value to the maximum.
SP SP + BP
Steps
Max Steps
Pressure
Pressure
Max Steps
SP SP + BP
Steps
Example: 4 fans without inverter
Pressure
SP + OFSI SP + OFSI + DI
Inverter
MinI
100.00 %
Example: 4 fans with 1 inverter