Xylem HYDROVAR Manual De Instrucciones Para La Instalación Y El Uso página 15

Assembly possibilities
Max. 45° left
Right mounting
General information about the System
The Hydrovar-Watercooled is suitable for constant pressure control of pumps and a maximum system pressure of
6 bars. The variable speed drive can be used for service water, water supply from a well or as a booster station.
The requirement for using this variable speed drive is a capable pump with an asynchronous motor suitable for a
3x230VAC supply and isolation class F.
Mounting into the pressure line with pressure tank
For applications as water supply or booster with automatic shutoff it is necessary to mount a check valve and a
pressure tank.
To measure or control the actual system pressure it is necessary that the check valve is mounted before the
Hydrovar-Watercooled.
The pressure tank can be mounted before or after the Hydrovar-Watercooled or of the not used pipe connection.
Between pressure tank and Hydrovar-Watercooled it is not allowed to mount a check valve or a pressure reduction
valve to ensure storing the pressure in the system at zero demand.
With the Hydrovar-Watercooled it is not necessary to have a large pressure tank for supply purposes.
For selecting a pressure tank, make sure it is approved and suitable for the maximum system pressure. The
pressure tank should have a capacity of more than 10% of the maximum system flow rate [l/min] of the pump.
Horizontal assembly
Possibilities for wrong mounting
WRONG –
There is no flow through
the Hydrovar-Watercooled
Inefficient cooling of the unit !
Max. 45° right
15
Vertical assembly
WRONG – Check valve
is mounted after the
Hydrovar-Watercooled
Wrong measuring point
for the system pressure
and therefore no
automatic stop of the
pump at zero demand.