Operation - Xylem LOWARA GHV Manual De Instalación Y Operación

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3.

Operation

The pumps are controlled by the converters according to system requirements.
The membrane tank provides for initial water demand.
When the pressure drops to the control value, the first variable speed pump starts running. If the water
demand rises, the speed increases until the subsequent pumps also start.
If consumption decreases, the speed of the pumps connected to the converter is reduced, or the fixed-
speed pumps are stopped.
If the demand drops further, the last pump fills the tank and then shuts down.
GHV/...../2, GHC/...../2 Single-Phase Version
The single-phase version has a single-phase control panel, the frequency converters power the motors
with variable frequency three-phase voltage.
Installed in the control panel of GHV sets are automatic line protection circuit breakers for each frequency
converter, as well as a main switch.
Installed in the control panel of GHC sets are automatic line protection circuit breakers for the frequency
converter and the motors of the fixed speed pumps, as well as a main switch
Three-phase version GHV/../4, GHC/../4, GVF/../4, GHV/../3, GHC/../3, GVF/../3
GHV: The three-phase version has a three-phase control panel, the frequency converters power the
motors with variable frequency three-phase voltage.
On the control panel are installed automatic line protection circuit breakers for each frequency converter,
as well as a main switch.
GHC, GVF: The three-phase version has a three-phase control panel. The frequency converter powers
the motor with variable frequency three-phase voltage.
Installed in the control panel are line protection circuit breakers for the frequency converter and for the
fixed speed motors, as well as a main switch.
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