Wilo Helix EXCEL Complete Installation And Operation Manual page 11

ring work be done before installing the pump.
• Thoroughly flush the system out before
installing the pump.
- The pumping boosting package must be installed
in an easily accessible position to facilitate inspec-
tion or replacement.
- For heavy pump boosting packages, install a lif-
ting hook (Fig. 2, ref. 10) above the pump in order
to ease its disassembly.
WARNING! Risk of accident by hot surfaces!
The pumping booster package must be positioned
so that someone cannot come into contact with
the hot pump surfaces while in operation.
- Install the pumping booster package in a dry
place protected from frost, on a flat concrete
block using appropriate accessoiries. If possible,
use an insulating material under the concrete
block (cork or reinforced rubber) to avoid any
noise and vibration transmission into the instal-
lation.
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
sufficiently 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 hydrau-
lic 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
Helix EXCEL Complete - Installation and operation manual
(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 .
7.3 Pipe connection
- Connect the pumping booster package to the
system piping using either NPT fittings or 300
Class ANSI Flanges.
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.
- Use of expansion joints may mitigate noise and
vibration of the pumping booster package.
- 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 is placed on the discharge pipe in
order to protect the pump against water-ham-
mer shock.
- For indirect connection via a tank, the suction
pipe must have a strainer to keep any impurities
out of the pumpinf booster package.
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.
11