DAB 1 NKV EN Instructions Pour L'installation Et La Maintenance page 28

Ensure that the characteristics of the water supply source are such as always to guarantee the flow rate
3.4.
required in the expected operating conditions.
3.5. 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 water supply source.
b) Provide each pump with its own intake pipe (EN 12845 – UNI 10779).
c) Lay the suction pipes horizontally or sloping slightly upwards towards the set.
d) Avoid using elbows or couplings that cause sudden changes in direction. If necessary, use bends with a wide radius.
Avoid the "siphon" effect at intake: it risks unpriming the pumps!
3.6. The vertical distance between the pump intake and the minimum water level must not exceed 3.2 metres.
(EN 12845 point 10.6.2.3 – UNI 10779)
4. ELECTRICAL CONNECTION
ATTENTION: RESPECT THE SAFETY REGULATIONS IN FORCE
4.1. 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. Values differing from those on the motor plate could
4.2.
cause irremediable damage.
Connect the leads of the power supply cable to the terminal board on the control panel, giving priority to
4.3.
the earth lead.
For the wiring diagram of the control panel and the respective informative notes, see the enclosed
documentation.
5. CHECKING OPERATION OF THE SET
5.1. CHECKING OPERATION OF THE ELECTROPUMP
a) Turn the main switch on the electropump panel to 1 (ON).
Check the direction of rotation of the electropump, starting it for a few moments with the START button and
check that, when viewed from the fan side, the motor is turning in a clockwise direction. If not, exchange on the
terminal board any two leads of the electropump panel power supply.
b) Turn the selector on the electropump panel to AUT position.
c) Open a valve in the system (or the pump manual start valve, located near the pressure switches)
d) Check that the electropump starts.
e) Close the valve in the system (or the pump manual start valve, located near the pressure switches)
f) Put the system under pressure.
g) Stop the electropump with the STOP button on the electric panel.
To check failed starting of the electric pump see the electropump instructions manual.
ATTENTION: DURING OPERATION OF THE ELECTROPUMP:

Check for any water leaks in the system and stop the electropump if necessary.

The contact that indicates when the electropump is running closes and may activate any connected
alarms.
ENGLISH
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