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4.6 Configuration and function
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Fig. 2:
Hydro-Unit Premium Line
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Control cabinet
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Control unit
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Pump
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Membrane-type accumulator
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Manifold
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Baseplate
Design
Fully automatic pressure booster system with two, three or four vertical high-pressure
pumps (3) for ensuring the required supply pressure.
Function
Hydro-Unit Premium Line F:
Either two, three or four pumps are controlled and monitored by a microprocessor control
unit (Megacontrol). The first pump is started up when the pressure falls below the set start-
up pressure. Additional pumps are sequenced in automatically in line with actual demand.
When demand decreases, the pumps are sequenced out again as the stop pressure (start-
up pr delta p) is reached. The pump that has been started up first will be stopped
first. The pumps are automatically started up in a different order for each new cycle. The
actual pressure is measured by an analog pressure transmitter. The function of this pressure
transmitter is monitored live-zero.
This ensures equal distribution of pump operating hours.
If a duty pump fails, the next pump is started up immediately. Via a volt-free contact a
general fault message can be transmitted (e.g. to the control station).
Hydro-Unit Premium Line VC, SVP
Either two or three (VC) or four (SVP) pumps are controlled and monitored by a
microprocessor control unit (Megacontrol). Each pump is operated on a frequency inverter
and controlled by the control unit so as to ensure a constant discharge pressure of the
pressure booster system.
As the demand increases or decreases, peak load pumps are started and stopped
automatically. As soon as the demand increases again after one pump has been stopped,
another pump which has not been in operation before is started up. When the last pump has
been stopped and the demand increases again, the next pump in line is started up on a
frequency inverter. The stand-by pump is also included in the alternating cycle.
The standard setting is for the pressure booster system to start automatically as a function
of pressure. As long as the pressure booster system is in operation, the pumps are started
and stopped as a function of demand (standard setting). In this way it is ensured that the
Summary of Contents for Hydro-Unit Premium Line F
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