Switchgear; Function Of The Product; Installation And Electrical Connection; Installation - Wilo SiFire Easy Série Notice De Montage Et De Mise En Service

Ø Discharge of main pump
DN32
DN40
DN50
DN65
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DN125
DN150

6.2.2 Switchgear

• Ensure complete automatic operations of each
pump and associated functions
• Waterproof, protection class IP 54.

6.3 Function of the product

The operational logic for the fire fighting unit is
based on the cascade calibration of the pressure
switches for pump starting. It is only possible to
stop the main pump manually if the pressure has
been replaced in the plant, or by switching off the
automatic mode before stopping the pump.
The jockey pump of the pressure boosting system
is the first to start and maintains the system full of
water and under pressure. It starts when the pres-
sure drops in the system. Start and stop control is
set up via the suitably calibrated pressure switch.
When a larger quantity of water is requested due
to opening one or more circuits or due to a broken
sprinkler, pressure decreases in the system. This
causes the start of the main pump.
For systems with more than one pump, if the main
electric pump does not start (e.g. due to electricity
problems) the drop in pressure will activate the
standby pump pressure switch which starts the
diesel engine. In some cases, two or more electric
pumps could be used.
Once the sprinkler circuit or the gate valve that
supply the sprinkler system is closed, the system
reaches the maintaining pressure of the installa-
tion; it will be necessary to push the "Stop" but-
tons on the switchgear to stop the main pump and
the standby pump. The jockey pump is automati-
cally stopped.

7 Installation and electrical connection

DANGER! Risk of electric shock!
Personnel dedicated to the connection of elec-
trical equipment and motors must be skilled for
such work. They shall make the connection
according to the wiring diagrams supplied, in
accordance with regulations and laws in force. In
addition, they must ensure that they have shut
down power before performing any operation
which provides the possible contact with the
electrical parts. Check earth continuity.
Installation and operating instructions Wilo-SiFire Easy
Ø Accessories
DN50
DN65
DN65
DN80
DN125
DN150
DN200
DN250

7.1 Installation

Install the pressure boosting system in an easily
accessible room, ventilated and protected from
rain and frost.
Make sure that the unit can pass through the room
door.
There must be sufficient space provided for main-
tenance work. The unit must be easily accessible.
The installation place has to be horizontal and flat.
It must be robust enough to support the system's
weight.
The room must be exclusively dedicated to fire
equipment, directly accessible from outside, and
have a fire resistance of at least 60 minutes (see
standards).
The room must be, in order of preference:
• isolated from the protected building,
• close-by to the protected building,
• inside the protected building.
NOTE:
For rooms with closed walls or inside the building,
it is preferable to have a fire resistance superior to
120 minutes. The temperature inside the room
cannot be less than 10 °C (4 °C in the presence of
electric pumps only) or beyond 25 °C (40 °C in the
presence of electric pumps only);
The room must be equipped with openings to
atmosphere to ensure adequate ventilation for
cooling engines (electric and diesel) and for diesel
engine combustion.
The room also shall be equipped with a sprinkler-
type protection (EN 12845).
The Sprinkler protection can be directly supplied
by the discharge manifold of the pressure boost-
ing system, as required by the EN 12845 standard.
Access to the room must be guaranteed and easy
for people, even if the installation of fire is on,
without light, if there is snow or rain, and in any
case that can negatively affect the access. Access
to the room must be sufficiently reported and
admitted only to authorised, specialised and
properly trained personnel.
Avoid access to the system for unauthorised
persons!
The pressure boosting system is a fire fighting
equipment using AUTOMATIC START and MAN-
UAL STOP ONLY. For this reason, there must be
a clearly visible sign in the system room warning
English
Ø Manifolds
DN65
DN65
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