Description Of The Product And Accessories; General Description; Components Of The Fire Extinguishing System In Accordance With Din14462 (Fla) - Wilo FLA-Serie Einbau- Und Betriebsanleitung

6 Description of the product and accessories

6.1 General description

The WILO-FLA fire extinguishing system in
accordance with DIN14462 is supplied as a com-
pact unit, with all pipes installed and ready for
connection (exception: if separate control device
in free-standing cabinet (SG) is used). The only
connections that have to be made are for the inlet,
pressure and bypass pipes and the electrical mains
connection.
It may also be necessary to install the supplied
accessories ordered separately.
The FLA must only be connected indirectly to the
water supply network (see Fig. 6a/b – system sep-
aration by a non-pressurised break tank). You will
find notes on the pump type used in the attached
installation and operating instructions for the
pump.
Observe the relevant, applicable regulations and
standards when using the fire extinguishing water
supply. The system must be operated and main-
tained in accordance with the relevant instruc-
tions (in Germany according to DIN 14462 und
DIN 1988(DVGW)) so that the security of the fire
extinguishing supply is permanently guaranteed
and neither the public water supply nor other
consumption installations are detrimentally
affected. The respective applicable regulations or
standards (see section 1.1) on the connection and
type of connection to public water supply net-
works are to be observed. They may be supple-
mented by regulations of the water supply
companies (WVU) or the responsible fire protec-
tion authority. In addition, local conditions must
be taken into account.
6.2 Components of the fire extinguishing system in
accordance with DIN14462 (FLA)
The system is made up of the main components
described below. The scope of delivery includes
separate installation and operating instructions
for the relevant operating parts/components (see
also supplied installation plan).
We differentiate between series FLA-1 (single-
pump system) and FLA-2 (redundant double-
pump system).
Mechanical and hydraulic system components:
FLA-1 series (Fig. 1a)
The system is mounted on a base frame with
vibration absorbers (3). It comprises a high-pres-
sure multistage centrifugal pump with a three-
phase AC motor (1), with a check valve (6) on the
suction side. A bypass (15) with a needle-type
throttle (11) and a non-return valve (7) are fitted
to the pressure side. There is also an assembly that
can be shut off with a pressure switch (12) and
pressure gauge (9) as well as an 8-litre diaphragm
pressure vessel (8) with a throughflow fitting (14)
that can be shut off. The control device (2) is
mounted on the base frame by means of an
upright support bracket (10) and ready-wired to
Installation and operating instructions Wilo-FLA
the electrical components of the system.
FLA-2 series (Fig. 1b)
The redundant double-pump system is mounted
on a base frame with vibration absorbers (3). It
consists of two independently operating single-
pump systems. The two high-pressure multistage
centrifugal pumps (1) are combined by means of
an inlet collecting pipe (4) and a pressure collect-
ing pipe (5). On each pump, there is a check valve
(6) on the inlet and pressure sides and a bypass
(15) on the pressure side with a needle-type
throttle (11) and a non-return valve (7). On the
pressure collecting pipe, there is an assembly that
can be shut off with three pressure switches (12A,
12B, 12C), a pressure gauge (9), a bleed valve (13),
an 8-litre diaphragm pressure vessel (8), and a
check valve with a bleed valve (14). In the com-
pact systems, the control device (2) is mounted on
the base frame by means of an upright support
bracket (10) and ready-wired to the electrical
components of the system. In the case of larger
systems, the control device is accommodated in a
separate free-standing cabinet (SG) and the elec-
trical components are pre-wired to the corre-
sponding connecting cable. For the separate free-
standing cabinet (SG), the final wiring is done by
the customer (see section 5.3 and the documen-
tation included with the control device).
These installation and operating instructions
describe the overall system in general only, with-
out going into a detailed description of the opera-
tion of the control device (see section 7.3 and the
accompanying documentation for the control
device).
High-pressure multistage centrifugal pumps (1):
Different types of non self-priming, vertically
installed high-pressure multistage centrifugal
pumps (Helix V... or MVI...) are installed in the FLA,
depending on the performance parameters
required.
FLA-1 uses one pump and FLA-2 uses two pumps.
The attached installation and operating instruc-
tions provide information on the pumps.
Control device (2):
Special switchgear and control devices in different
designs are used to activate and control the FLA
fire extinguishing systems. For information on the
control device installed in this FLA, see the rele-
vant attached installation and operating instruc-
tions.
English
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