Sets With Several Pumps; Periodic Maintenance; Weekly Check; Monthly Check - DAB 1 KDN Instructions Pour L'installation Et La Maintenance

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.
7.

PERIODIC MAINTENANCE

The whole fire-fighting system to standard EN 12845 – UNI 10779, including the set of fire-fighting pumps, must always be kept in
perfect working order. For this reason, regular maintenance is of particular importance.
According to standard EN 12845 point 20.1.1 – UNI 10779, the user must:
- carry out a programme of inspections and checks;
- arrange a testing, assistance and maintenance programme,
- document and record the activities, filing the documents in a special register kept in the building.
The user must ensure that the testing, assistance and maintenance programme is carried out under contract by the installer of the
system or by a company with the same qualifications.
7.1. WEEKLY CHECK (to be carried out at intervals of no more than 7 days)
The weekly check of the fire-fighting set to standard EN 12845 – UNI 10779 contemplates checking and noting down the
following values:

pressure of pressure gauges,

water level in the tanks – water reserves,

correct position of the interception valves.
To test the automatic starting of the pumps, proceed as described below:

Check the levels of the fuel and lubricating oil in the Diesel motors.

Open the pump manual start valve (ref. 5).

Check that the pump starts and make a note of the starting pressure.

Close the manual start valve.
In the case of a Diesel motor, the motor will be let run for at least 5 minutes.

Stop the pump with the STOP button on the electric panel.
OPERATIONS ONLY FOR THE DIESEL MOTOR PUMP

Straight after stopping, the Diesel motor pump must be restarted immediately with the manual start test button
"OPERATE MANUAL START".

Stop the pump with the STOP button on the electric panel.
7.2.

MONTHLY CHECK

Check the level and density of the acid in all the cells or the starting batteries with a densimeter.
If the acid density is low, check the battery charger and, if necessary, change the batteries.
7.3. QUARTERLY CHECK (at intervals of no more than 13 weeks – see EN 12845 point 20.3.2 – UNI 10779)

Check for any changes in the system, changed class of risk, etc.

Check sprinklers, pipes, pipe supports (see EN 12845 point 20.3.3.2 – UNI 10779).

Start the pumps and check the pressure and the flow rate.

Check the operation of any generators – generating sets.

Check the correct position of the interception valves.

Check the correct operation of the secondary electric power supply coming from Diesel generators.
7.4. HALF-YEARLY CHECK (at intervals of no more than 6 months – see EN 12845 point 20.3.3 – UNI 10779)

Check the dry alarm valves (in the system).

Check the operation of the alarms in the control room and/or at the Fire Station.
ENGLISH
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