KGL Operating Manual – VS 3010 BS
2018-07-02
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In the case of a positive control error, the speed controller is enabled via the first fan capacity stage F1 of the
pack controller. The calculation of the control signal for the condenser speed is performed using a PI control
algorithm ans is output to the speed controller via the first analogue output (0..10 V, terminals 53/54). If the
speed reaches its maximum value, a further capacity stage is loaded after a time delay.
The input signal for the first fan stage is reduced to the minimum speed. Fans which have been shut down via
the motor overload cutout will be ignored for the control. If the pressure has reached a specified threshold
(parameter tc-max. menu 3-2-2-1), operation by power supply is activated with the stage No. cond. 1.
The speed controller is disabled during operation by power supply.
Afterwards, the first fan is disconnected from the speed controller and activated on the mains power supply.
The following diagram shows the speed sequence for starting using the example of a system with five fans: