Pipe Connection; Electrical Connections - Wilo Helix EXCEL 10 Notice De Montage Et De Mise En Service

- The pump must be installed in an easily accessible
position to facilitate inspection or replacement.
- For heavy pumps, install a lifting hook (Fig. 2, ref.
10) above the pump in order to ease its disas-
sembly.
WARNING! Risk of accident by hot surfaces!
The pump must be positioned so that someone
cannot come into contact with the hot pump sur-
faces while in operation.
- Install the pump in a dry place protected from
frost, on a flat concrete block using appropriate
accessoiries. If possible, use an insulating mate-
rial under the concrete block (cork or reinforced
rubber) to avoid any noise and vibration trans-
mission into the installation.
WARNING! Risk of fall!
The pump must be correctly screwed to the
ground.
- Place the pump where it will be easy to reach, to
facilitate inspection and removal work. The pump
must always be installed perfectly upright on a suf-
ficiently heavy concrete base.
CAUTION! Risk of parts inside the pump!
Take care to remove port covers of the pump
housing before installation.
NOTE: Pumps may be tested regarding hydraulic
features in factory, some water may remain in
them. It is recommended for hygienic purposes, to
carry out a rinsing of the pump before any using
with potable water supply.
- The installation and connection dimensions are
given in section 5.2.
- Lift the pump carefully by using the integrated
hooks rings, if necessary with a hoist and suitable
slings according to the current hoist guidelines.
WARNING! Risk of fall!
Vertical multistage pumps may have a high center
of gravity. Take care to secure the pump firmly to
avoid risks.
WARNING! Risk of fall!
Use integrated rings only if they are not damaged
(no corrosion ...). Replace them if needed.
WARNING! Risk of fall!
The pump must be never carried by using motor lifting
lugs: these are only designed to lift the motor alone.
- The motor is provided with condensate hole
(under the motor), filled in factory by caps to
guarantee the IP55 protection. For use in envi-
ronments where condensate may occur (such as
humid or chilled water applications), the conden-
sate plugs must be removed to allow for proper
evacuation of fluid from the motor .
WILO SE 05/2014

7.3 Pipe connection

- Connect the pump to the pipes by using only
counterflange accessories supplied with the
product.
CAUTION!
Tightening of screws or bolts must not exceed 90
inch-lbs (10 daN.m).
Use of impact wrench is prohibited.
- The direction of fluid flow is indicated on the
pump.
- 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.
- It is recommended that isolation valves be in-
stalled on the suction and discharge side of the
pump.
- Use of expansion joints may mitigate noise and
vibration of the pump.
- As regards the nominal cross-section of the suc-
tion pipe, we recommend a cross-section at least
as large as that of the pump connection.
- A check valve could be placed on the discharge
pipe in order to protect the pump against ham-
mer shock.
- For direct connection to a public drinking water
system, the suction pipe must also have a check
valve and a guard valve.
- For indirect connection via a tank, the suction
pipe must have a strainer to keep any impurities
out of the pump and a suction-side check valve.
7.4 Motor connection for bare-shaft pump
(without motor)
- Remove coupling guards.
NOTE: Coupling guards can be removed without
entirely unscrewing screws.
- Install the motor on the pump by using screws
(FT lantern size – see product designation) or
bolts, nuts and handling devices (FF lantern size
– see product designation) provided with the
pump: check motor power and dimension in Wilo
catalogue.
NOTE: Depending on fluid characteristics, motor
power could be modified. Contact Wilo Customer
Services if needed.
- Close the coupling guards by screwing all screws
provided with the pump.

7.5 Electrical connections

DANGER! Danger of death!
National Electrical Codes (NEC), local codes and
regulations must be followed.
WARNING! Electrical shock hazard!
Dangers caused by electrical energy must be ex-
cluded.
• Electrical work by a qualified electrician only!
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