HYDROO VDROO Series, Installation, Operation And Maintenance Manual

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3. The pump must be installed in a well ventilated and freeze protected place. There
must be 150 mm minimum distance between the motor and any other object to
ensure cool air supply to the motor fan.
4. All the pipes must be fitted with their own supporting elements independent from
the unit.
5. In order to minimize suction load loss, the suction pipe must be as short as possible.
Likewise, the suction pipe must be perfectly sealed and without any air in it.
6. If the pump is to be used in an open circuit, the suction pipe diameter must be
adequate for the installation conditions. The suction pipe diameter should not be
smaller than the suction port diameter. When the suction pipe is bigger than the
suction port, an adaptor must be installed.
7. Model VDROO 32 and above, allow horizontal or vertical installations. However,
the motor must never be installed at a lower level than the base plate or in an
inverted position.
8. Motors over 4 kW must be installed on a stand.
9. In order to minimize pump noise, we recommend the use of expansion joints
on both ends of the pump. The installation/foundation must be carried out as
described in 5.3 Foundation.
10. Install isolation valves on both sides of the pump to stop the system from getting
empty when the pump is to be removed to be cleaned, repaired or replaced.
11. Use a non-return valve (foot valve) to protect the pump against backflow.
12. Install the pipes so that no air bubbles are formed, particularly at the suction end
of the pump (Figure 8).
Wrong Correct
Aire Aire
Aire
Figure 8:
Correct installation of
the pipes
13. You should install a vacuum valve near the pump if the installation meets one of
the following characteristics:
· The downstream pipe is inclined downwards.
· There is a risk of syphon effect.
· Protection against dirty liquid backflow is needed.
14. Before installing the pump, the suction pipe must be cleaned. When pipes carry
impurities, it is needed to install a filter at 0.5~1 m from the pump inlet (particularly
recommended for pumps with a flow below 10 m3/h).
5.3. Foundation
ATTENTION:
Foundation and installation must be performed according to the
instructions below. Otherwise, operating failures and pump components’
damage may occur.
We recommend that our pumps are installed on a concrete foundation stand that is
heavy enough to provide permanent and rigid support to the whole pump. Foundation
stands must be capable of absorving any vibration, normal strain or shock. . Concrete
foundation stand surfaces must be entirely flat and even.
Place the pump on the foundation stand and fasten it. The whole of the pump base
plate must rest on the stand surface.
Recommended length and width are indicated at Figure 9. Note that the length and
width of the foundation for pumps with motor size ≤ 30 kW must be 200 mm larger
than the base plate.
Figure 9:
Installing the pump
in vertical position