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Installation and operating instructions Wilo-VeroLine-IP-E, VeroTwin-DP-E 75
• If used in air-conditioning/cooling systems, this plug must be
removed downwards so that condensation water can drain.
• With a horizontal motor shaft, the condensate hole must be posi-
tioned towards the bottom (Fig 18, Item 2). If necessary, the motor
must be turned accordingly.
NOTE:
If the plastic plug is removed, protection class IP 55 is no longer
ensured.
NOTE:
In the case of insulated systems, only the pump housing may be insu-
lated, not the lantern, drive and differential pressure sensor.
An insulating material which does not contain ammonia compounds
must be used when insulating the pump, in order to prevent stress cor-
rosion cracking of the union nuts. If this is not possible, direct contact
with the brass screw connections must be avoided. Stainless steel
screwed connections are available for this as an accessory. As an alter-
native, corrosion protection tape (e.g. insulating tape) can also be used.
7.3 Electrical connection
Safety DANGER! Risk of fatal injury!
An improper electrical connection can result in a fatal electrical
shock.
• Have the electrical connection established by an electrician
approved by the local electricity supplier only and in accordance
with local regulations.
• Observe the installation and operating instructions for the acces-
sories!
DANGER! Risk of fatal injury!
Contact voltage hazardous to human life.
Work on the electronic module may only be started once 5 minutes
have passed, due to the dangerous residual contact voltage
(capacitors).
• Before working on the pump, disconnect the power supply and
wait for 5 minutes.
• Check whether all connections (including potential-free contacts)
are voltage-free.
• Never use an object to poke around the openings on the electronic
module and never insert anything into the terminal box!
WARNING! Risk of mains overload!
An inadequate mains design can lead to system failures and cable
fires due to mains overload.
• When designing the mains, with regard to the cable cross-sections
and fuses, give special consideration to the fact that short-term
simultaneous operation of all pumps is possible in multi-pump
operation.
Preparation/notes
• The electrical connection must be made using a permanently installed
mains connection line (see following table for cross-section) with a
plug-and-socket connection or an all-pole switch with a contact
opening width of at least 3 mm. If flexible cables are used, ferrules
must be used.
Fig. 22: M25 threaded cable connection
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