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Installation and electrical connection
20
WILO SE 2020-12
1
2
3
4
5
6
7
Fig. 7:
Overview of connections
1
Main pump: Inlet connection
2
Hydraulic pressure relief valve
3
Main pump: Discharge connection
4
Break tank connection
5
Jockey pump connection
6
Discharge connection for sprinkler
system
7
Sprinkler system connection for in-
stallation location
Connect the following circuits in accordance with EN 12845:
ƒ
Connect the sprinkler system to the discharge connection.
ƒ
Connect the suction line to the inlet connection of the main pump.
–
Keep pipe as short as possible.
–
Connect the piping to the pump with a straight or conical pipe.
The pipe must be at least twice as long as the nominal diameter. The reducer
must run straight at the top. The angle must be no more than 20°.
–
Install gate valve.
–
Lay the piping horizontal or with a slight continuous gradient toward the pump.
–
If the centre line of the pump is located above the lowest water level in the water
tank, install a foot valve.
–
Dimensioning of NPSH value including all valves and fittings at max. fluid temper-
ature: The NPSH value at the pump connection must exceed the required NPSH
value by 1 m (at max. volume flow).
ƒ
Connect a separate suction line to the inlet connection of the jockey pump.
ƒ
Recirculation circuit. Separate water circuit for manual operation and test runs.
ƒ
Guide hydraulic pressure relief valve back into the water tank or break tank.
ƒ
Optional circuits:
–
Connect sprinkler system to protect the system.
–
Connect volume flow measuring circuit to control the pump.
NOTICE! Omitted
for systems with jockey pumps!
Run the return of the measuring circuit into the water tank or to the drain.
Connections
Pump type
Main pump: Inlet
connection
Pressure relief valve
connection
Main pump: Dis-
charge connection
Break tank connec-
tion
Jockey pump con-
nection
Discharge connec-
tion for sprinkler
system
Sprinkler system
connection for in-
stallation location
Jockey pump: Inlet
connection
SiFire FIRST 32/ ...
DN 50
DN xxx
DN 32
DN 50
DN 25
DN 50
DN 25
Rp 1
SiFire FIRST 40/ ...
DN 65
DN xxx
DN 40
DN 50
DN 25
DN 50
DN 25
Rp 1
SiFire FIRST 50/ ...
DN 65
DN xxx
DN 50
DN 50
DN 25
DN 65
DN 25
Rp 1
SiFire FIRST 65/ ...
DN 80
DN xxx
DN 65
DN 50
DN 25
DN 80
DN 25
Rp 1
SiFire FIRST 80/ ...
DN 100
DN xxx
DN 80
DN 50
DN 25
DN 125
DN 25
Rp 1
SiFire FIRST 100/ ...
DN 125
DN xxx
DN 100
DN 50
DN 25
DN 150
DN 25
Rp 1