Wilo Wilo-Helix V FIRST V 2.0-VE 10, Installation And Operating Instructions Manual

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en Installation and electrical connection
16 WILO SE 02/2022
WARNING
Risk of fall!
The pump must be never carried by using motor hooks: these are only designed to
lift the motor alone.
7.3 Pipe connection
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Connect the pump to the pipes by using appropriate counterflanges, bolts, nuts
and gaskets.
CAUTION
Tightening of screws or bolts must not exceed.
Configuration PN16 / PN25
M10 – 20 N.m - M12 – 30 N.m
Configuration PN40
M12 – 50 N.m - M16 – 80 N.m
Use of impact wrench is prohibited.
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The circulation sense of the fluid is indicated on the identification label of the
pump.
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Pump must be installed in such a way that it is not stressed by the pipework. The
pipes must be attached so that the pump does not bear their weight.
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It is recommended that isolation valves be installed on the suction and discharge
side of the pump.
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Use of expansion joints may mitigate noise and vibration of the pump.
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As regards the nominal cross-section of the suction pipe, we recommend a cross-
section at least as large as that of the pump connection.
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A check valve could be placed on the discharge pipe in order to protect the pump
against hammer shock.
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For direct connection to a public drinking water system, the suction pipe must also
have a check valve and a guard valve.
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For indirect connection via a tank, the suction pipe must have a strainer to keep
any impurities out of the pump and a check valve.
7.4 Motor connection for bare-shaft
pump (without motor)
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Remove coupling guards.
NOTICE
Coupling guards can be removed without entirely unscrewing screws.
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Install the motor on the pump by using screws (FT lantern size – see product des-
ignation) or bolts, nuts and handling devices (FF lantern size – see product desig-
nation) provided with the pump : check motor power and dimension in Wilo cata-
logue.
NOTICE
Depending on fluid characteristics, motor power could be modified. Contact The
Wilo Customer Services if necessary.
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Close the coupling guards by screwing all screws provided with the pump.