DAB KDN Bedienungsanleitung Seite 44

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.
6.2. CHECKING OPERATION OF THE COMPENSATING ELECTROPUMP (PILOT PUMP)
The compensating pump (or pilot pump) is an auxiliary pump which intervenes to draw small amounts of water.
It starts at a pressure higher than the starting pressure of the main pumps and stops when the pressure in the system is
restored.
It is not obligatory, but it is recommended in order to avoid needless starts of the main pumps in the case of leaks in the
system.
a) Turn the main switch on the electropump panel to 1 (ON).
To check the direction of rotation of the compensating electropump (or pilot pump), turn its selector to MAN for
a few moments 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 power supply of the panel for the compensating
electropump (or pilot pump).
b) Turn the selector on the electropump panel to AUT position.
c) Turn on a hydrant in the system.
d) Check that the compensating electropump (or pilot pump) starts.
e) Turn off the hydrant.
f) Check that the electropump stops AUTOMATICALLY.
6.3. CHECKING OPERATION OF THE DIESEL MOTOR PUMP
a) Turn the main switch on the Diesel motor pump panel to 1 (ON).
A 230V electric heater (located under the oil sump for air-cooled motors or in the head for water-cooled motors)
will bring the oil (or water) to a minimum temperature, so as to facilitate starting of the motor pump.
When the minimum temperature is reached, the heater warning light next to the display on the panel will go out.
When the Diesel motor pump is started up on the site for the first time, it is necessary to
check the failed start alarm. (EN 12845 10.9.13.2 – UNI 10779)
See the Electric Panel instructions booklet for further information.
b) Turn the selector on the Diesel motor pump panel to AUT position.
c) Open a valve in the system (or the pump manual start valve – ref. 5)
d) Check that the motor pump starts.
e) Close the valve in the system (or the pump manual start valve – ref. 5).
f) Check that the number of rpm, shown on the display, corresponds to the value indicated on the data plate on the
accelerator control, if necessary regulate the accelerator according to the indication on the plate.
g) Put the system under pressure.
h) Stop the motor pump with the STOP button on the electric panel.
ATTENTION: DURING OPERATION OF THE DIESEL MOTOR PUMP:

Check for any water leaks in the system and stop the motor pump if necessary.

The contact that indicates when the motor pump is running closes and may activate any connected
alarms.
If it fails to start, the Diesel motor pump makes six attempts to start alternately on the two batteries
(EN 12845 point 10.9.7.2 – UNI 10779).
The condition of Diesel motor pump running is detected by the speed sensor on the motor.
If the motor pump does not start after six attempts, the electric panel activates:

a failed start warning light,

a failed start alarm contact.
6.4. SETS WITH SEVERAL PUMPS
Standard EN 12845 – UNI 10779 contemplates various solutions with one or more pumps having similar characteristics:

if TWO pumps are installed, each pump supplies the total flow rate of the system (100%),

if THREE pumps are installed, each pump supplies 50% of the total flow rate.
Also, in sets where more than one pump is installed with superior or duplicate water supply, only one pump will be
electric (10.2). From this it may be deduced that, in the case of a superior or duplicated supply, the sets will be
composed of:
a)
1 electropump (100%),
b)
1 Diesel motor pump (100%),
c) 1 electropump + 1 Diesel motor pump (each supplies 100%),
d)
1 electropump + 2 Diesel motor pumps (each supplies 50%),
e) 3 Diesel motor pumps (each supplies 50%),
In the case of a single supply, there are no limits to the number of electropumps.
DAB supplies the sets in a "modular" version, in separate units, so as to be able to make up all the versions mentioned above.
By means of the JOINING MANIFOLD (see drawing on page 32) it is possible to join the manifolds so as to obtain a single
delivery manifold.
The intakes, the electric panels, etc. remain separate as contemplated by standard EN 12845 – UNI 10779.
ENGLISH
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