Wilo -SiFire FIRST Installation And Operating Instructions Manual page 20

en
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Fig. 7: Overview of connections
Pump type
SiFire FIRST 32/ ...
SiFire FIRST 40/ ...
SiFire FIRST 50/ ...
SiFire FIRST 65/ ...
SiFire FIRST 80/ ...
SiFire FIRST 100/ ...
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Installation and electrical connection
1 Main pump: Inlet connection
3 Main pump: Discharge connection
Jockey pump connection
5
Sprinkler system connection for in-
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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°.
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Install gate valve.
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Lay the piping horizontal or with a slight continuous gradient toward the pump.
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If the centre line of the pump is located above the lowest water level in the water
tank, install a foot valve.
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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.
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Recirculation circuit. Separate water circuit for manual operation and test runs.
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Guide hydraulic pressure relief valve back into the water tank or break tank.
ƒ
Optional circuits:
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Connect sprinkler system to protect the system.
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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
DN 50 DN xxx DN 32
DN 65 DN xxx DN 40
DN 65 DN xxx DN 50
DN 80 DN xxx DN 65
DN 100 DN xxx DN 80
DN 125 DN xxx DN 100
2 Hydraulic pressure relief valve
4 Break tank connection
Discharge connection for sprinkler
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system
DN 50 DN 25 DN 50
DN 50 DN 25 DN 50
DN 50 DN 25 DN 65
DN 50 DN 25 DN 80
DN 50 DN 25 DN 125
DN 50 DN 25 DN 150
DN 25 Rp 1
DN 25 Rp 1
DN 25 Rp 1
DN 25 Rp 1
DN 25 Rp 1
DN 25 Rp 1
WILO SE 2020-12