Wilo Helix VE 22 Series, Инструкция по установке и эксплуатации

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7.3 Pipe connection
- Connect the pump to the pipes by using appro-
priate counterflanges, bolts, nuts and gaskets.
CAUTION!
Tightening of screws or bolts must not exceed:
The use of an impact wrench is prohibited.
- The flow direction of the pump is indicated on
the rating plate of the pump.
- The pump must be installed so that it does
induce any stress into the pipework. The pipes
must be attached so that the pump does not
bear their weight.
- The installation of insulation valves on the suc-
tion and discharge side of the pump is recom-
mended.
- Use expansion joints to mitigate noise and vibra-
tion, if required.
- The nominal cross-section of the suction pipe
should be at least as large as that of the pump
connection.
- The installation of a check valve in the discharge
pipe is recommended to protect the pump
against pressure impulses.
- When directly connected to a public drinking
water system, the suction pipe must be fitted
with a check valve and a guard valve.
- When indirectly connected via a tank, the suc-
tion pipe must be equipped with a strainer to
protect pump and check valve against impurities.
- In case of half flanges pump design, it is recom-
mended to connect the hydraulic network and
then keep out the plastic fixation links to pre-
vent any leakage risk.
7.4 Motor connection for bare­shaft pump
(without motor)
- Remove the coupling guards.
NOTE: Coupling guards can be removed without
removing the screws completely.
- Attach the motor to the pump using screws (for
FT lantern size – see product designation) or
screws, nuts and handling devices (for FF lantern
size – see product designation) provided with
the pump. Verify motor power and dimensions in
Wilo catalogue.
NOTE: Motor ower can be adjusted in accordance
with the fluid’s characteristics. Contact the Wilo
customer service, if required.
- Close the coupling guards by tightening all
screws provided with the pump.
7.5 Electrical connections
WARNING! Risk of electrical shock!!!
Ensure that any electrical hazard is avoided.
• Electrical work must only be carried out by
qualified electricians!
• Ensure that the power supply is switched off
and secured against unauthorised switching
before making any electrical connections.
• Safe installation and operation requires the
pump to be properly earthed at the power sup-
ply’s grounding terminals.
- Check that operating current, voltage and fre-
quency comply with the specifications on the
motor rating plate.
- The pump must be connected to the power
supply by a solid cable equipped with an earthed
plug-connection or a main power switch.
- Three-phase motors must be connected to an
approved motor starter. The set nominal current
must correspond to the electrical data specified
on the pump motor rating plate.
- The supply cable must be routed in such a way
that it does not contact the pipework and/or
pump and motor casing.
- Pump and/or installation must be earthed in
compliance with local regulations. A residual
current device (RCD) may be used for extra pro-
tection.
- The power cable (3 earth) must be fed
through the threaded cable connection shown in
black below.
Non-assigned threaded cable connections must
remain sealed with the plugs provided by the
manufacturer.
Power (kW)
0.55 0.75 1.1 1.5 2.2 3 4 5.5 7.5 11 15 18.5 22
M25
M25
M32/M40
Configuration PN16 / PN25
M10 – 20 N.m
M12 – 30 N.m
Configuration PN40
M12 – 50 N.m
M16 – 80 N.m
44
English
WILO SE 01/2016