The Booster; Description Of The Product; Function Of The Product; Control Box - Wilo SiFire EN Série Notice De Montage Et De Mise En Service

6.2 Description of the product

6.2.1 The booster - See fig. 3 – Position:
1 Gate valve
2 Connection for local sprinkler
3 Double pressure switch circuit main pump
4 Non-return valve
5 Flexible vibration-damping sleeves for diesel
pump
6 Connection for recirculation circuit with dia-
phragm
7 Divergent cone on discharge side main pump
8 Pump/motor coupling with spacer
9 Main pump electric/diesel motor
10 Coupling guard
11 Main pump control panel
12 Jockey pump control panel
Æ discharge of main pump
DN32
DN40
DN50
DN65
DN80
DN100
DN125

6.2.2 Control box

• 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 extinguishing
unit is based on the cascade calibration of the
pressure switches for pump starting. The jockey
pump of pressure boosting is the first to start and
maintains the system full of water and under pres-
sure. It starts when the pressure drops in the sys-
tem. Start and stop control is set up via the
suitably calibrated pressure switch.
Installation and operating instructions Wilo-SiFire System
13 Discharge manifold
14 Connection for setting of flow meter option
15 Fuel tank (for diesel pump)
16 Connection for priming circuit of main pump
17 Main pump
18 Jockey pump
19 Tank for fuel leakages
20 Fuel tank vent valve
21 Fuel level gauge
22 Drain for cleaning of deposit in fuel tank
23 Drain for cleaning of deposit in tank for fuel
leakage
24 Fuel filler cap
25 Connection for motor return pipe
26 Connection for fuel supply to the motor
27 Level gauge for fuel
Æ Accessories
DN50
DN65
DN65
DN80
DN100
DN125
DN150
When a larger quantity of water is requested, due
to the opening of one or more circuits or due to a
broken sprinkler, pressure decreases in the sys-
tem. This drives the main pump to start.
For systems with more than one pump, if the main
electric pump does not start, due to electricity
problems for example, 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 press the –Stop– but-
tons on panels to stop the main pump and standby
pump. The jockey pump is automatically stopped.
English
Æ Manifolds
DN65
DN65
DN80
DN100
DN125
DN150
DN200
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