Pipe Connection; Electrical Connections - Wilo HELIX VE 1 Serie Instrucciones De Instalación Y Funcionamiento

- Lift the pump only with appropriate lifting devic-
es and suitable slings in compliance with lifting
regulations. The integrated lifting hooks must be
used for lifting and the fixation of the pump.
WARNING! Risk of tipping!
There is a high risk of falling due to the high posi-
tion of the centre of gravity especially for larger
pumps. Take special care to the safe fixation of the
pump during handling.
WARNING! Risk of tipping!
Use integrated lifting hooks only if they are not
damaged (e.g. by corrosion). Replace them, if
required.
WARNING! Risk of tipping!
Never lift the complete pump using the motor
hooks as these are designed to lift the motor only.
- Motors are equipped with drain holes for con-
densed water that are sealed at the factory by
plastic plugs to ensure IP55 protection. If used in
air-conditioning or cooling systems, remove these
plugs to allow draining.
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:
Configuration PN16 / PN25
M10 – 20 N.m M12 – 30 N.m
Configuration PN40
M12 – 50 N.m M16 – 80 N.m
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 equipped
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.
Installation and operating instructions -
7.4
- Check that operating current, voltage and fre-
- The pump must be connected to the power
- The supply cable must be routed in such a way
- There are 3 operating modes
WILO-HELIX VE 1~

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.
quency comply with the specifications on the
motor rating plate.
supply by a solid cable equipped with an earthed
plug-connection or a main power switch.
that it does not contact the pipework and/or
pump and motor casing.
Operating modes and diagrams
(see chapter 8: Starting up):
Manual mode: Mode 1
Pressure regulation mode: Mode 2
External control mode: Mode 3
NOTE: If the pump is supplied separately, i.e. if it is
not integrated in a system that has been mounted
by us, then the configuration type at the time of
delivery is Mode 1.
DANGER! Risk of death!
Hazardous voltage due to the discharge of the
converter capacitors.
• Before any work on the converter, wait for 5
minutes after disconnecting the power supply.
• Check that all electrical connections and con-
tacts are de-energised.
• Check that the pressure connection terminals
have been allocated correctly.
• Check that the pump and the installation are
earthed correctly.
English
31