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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
6.2 Automatic settings
The control system for HDF16V & 20V, must always be equipped with a frequency converter. This
is factory calibrated if delivered from Hydrotech. To perform a soft start of the drive motor, the
frequency converter settings must be min. 5 sec “ramp up” and min. 3 sec ”ramp down”. The filter
works with 50 Hz as standard.
Hydrotech control systems are available in various configurations. Hydrotech control cabinet
type PFC has a simpler control system with a logic module.
If the filter is equipped with a Hydrotech standard PFC controller, the filter has two operating
modes:
1. Continuous rotation (HAND mode)
2. Automatic level control (AUTO mode).
Turn the mode selector to select the operating mode (see E in Figure 6.1).
Note! The appearance and layout of the control cabinet may differ depending on application.
Figure 6.1 Hydrotech control cabinet type PFC (option)
(Appearence of cabinet may differ depending on application)
A. DRUM DRIVE TRIPPED. LED that indicates when the frequency converter has tripped.
B. PUMP TRIPPED. LED that indicates when the wash water pump’s motor protection devi-
ce has tripped.
C. DRY RUNNING. LED that indicates when the dry running protection device for the wash
water pump has tripped.
D. RESET DRY RUNNING. Resetting of wash water pump’s dry running protection device.
E. OPERATION MODE. Mode selector.
F. PUMP. Pump switch.
G. CLEANING START. Chemical wash switch, key operated.
H. CHEMICAL CLEANING. Lamp that indicates when the chemical wash is in progress.
I. CLEANING SEQUENCE. Selector for number of sequences, chemical cleaning.
J. MAIN POWER SWITCH