DAB JET Series Instructies Voor Installatie En Onderhoud pagina 27
Beschikbare talen
Beschikbare talen
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3. INSTALLATION
3.1
3.2
3.3
Make the intake section following all the precautions necessary to keep load losses to a minimum and to avoid the formation of air
pockets, for example:
a) Position the set as close as possible to the power supply source.
b) Consider a suction pipe diameter never smaller than that of the manifold.
c) Lay the suction pipe horizontally or sloping slightly upwards towards the set. (fig.3).
d) Avoid using elbows or couplings that cause sudden changes in direction. If necessary, use bends with a wide radius.
3.4
Ensure that the characteristics of the water supply source are in proportion to those of the set installed.
a) SUCTION FROM A WELL ( PUMP ABOVE HEAD ): It is advisable to use protection against dry operation to prevent the set from
operating in abnormal conditions.
b) SUCTION FROM A TANK ( PUMP BELOW HEAD OR ABOVE HEAD ): It is advisable to protect the pump against dry operation,
for example using float switches.
c) DIRECT CONNECTION TO THE MAINS: If the pressure could fall to values that are too low, it is advisable to fit a minimum
pressure switch on intake to protect the set.
4. ELECTRICAL CONNECTION
CAUTION! ALWAYS FOLLOW THE SAFETY REGULATIONS!
4.1
4.2
4.3
For the wiring diagram of the control panel and the respective informative notes, see the enclosed documentation.
The set must be fitted in a well ventilated place, protected from unfavourable weather conditions and with an
environment temperature not exceeding 40°C (fig.1).
Position the set in such a way that any maintenance jobs can be carried out without difficulty.
Ensure that the system pipes are independently supported and do not weigh down on the set manifolds so as to
avoid deformation or breaking of any of its components (fig.2).
It is also advisable to insert vibration-damping couplings on the system manifolds.
Avoid the "siphon" effect at intake: it risks unpriming the pumps!
Dry operation damages the electropumps.
The electrical installation must be carried out by a qualified, skilled electrician (see point 2.1.) in
compliance with the Safety Regulations in force in the country where the product is installed.
Check the power supply voltage and frequency (fig.4).
Values differing from those on the motor plate could cause irremediable damage.
Connect the leads of the power supply cable to the terminal board on the control panel, giving priority to the
earth lead.
ENGLISH
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