Wilo Rexa PRO Series, Инструкция по установке и эксплуатации

Страница: 15 / 31

18 WILO SE 2015-07 V05 Letter
US English INSTALLATION
pump at a slight angle (if installed as a portable
pump). Protect the pump from frost.
5.2. Installation methods
• Vertical stationary wet well installation with guide
system
• Vertical portable wet well installation with pump
foot
• Vertical stationary dry well installation
5.3. Installation
DANGER: from falling!
When installing the pump and its accessories,
work is sometimes performed directly at the
edge of the basin or sump. Carelessness or
wearing inappropriate clothing could result in a
fall. There is a risk of fatal injury! Take all neces-
sary safety precautions to prevent this.
The following information should be taken into
consideration when installing the pump:
• This work must be carried out by a qualified person
and electrical work must be carried out by an elec-
trician.
• The operating space must be clean, free of coarse
solids, dry, frost-free and, if necessary, decontami-
nated. It must also be suitable for the particular
pump.
• When working in sumps, a second person must be
present for safety reasons. If there is a risk of toxic
or asphyxiating gases building up, the necessary
precautions must be taken.
• The system planner should select the sump size and
motor cooling time according to the ambient condi-
tions in operation.
• Ensure that lifting equipment can be set up without
any trouble, since this is required for assembly and
removal of the pump. It must be possible to reach
the pump safely in its operating and storage loca-
tions using the lifting equipment. The machine must
be positioned on a firm bearing surface. For trans -
porting the pump, the lifting gear must be secured
to the lifting eyelets or handle provided. When using
chains, they must be connected with a shackle to
the lifting eyelets or the handle. Lifting gear must
be technically approved.
• Power supply cables must be laid out in such a way
that safe operation and trouble-free assembly/dis-
mantling are possible at all times. The pump must
never be carried or dragged by the power supply
cable. Check whether the cable present is adequate
for the type of installation selected, in terms of its
cross-section and its length.
• When using switchgear, the corresponding protec-
tion class must be observed. In general, switchgear
is to be installed outside potentially explosive areas
in such a way that it is protected from submersion.
• When used in an explosive atmosphere, it must be
ensured that the pump and all accessories are ap-
proved for this purpose.
• Structural components and foundations must be of
sufficient stability in order to allow the product to
be fixed securely and functionally. The end user or
the supplier is responsible for the provision of the
foundations and their suitability in terms of dimen-
sions, stability, and strength.
• If the motor housing is to be taken out of the fluid
during operation, the operating mode for non-
immersed operation should be applied.
To keep glanded motors sufficiently cooled in S3
mode, they must be flooded completely before
being switched back on if the motor has been
taken out of the fluid!
• Never let the pump run dry. The water level must
never fall below the minimum. Therefore, we rec-
ommend installing a level control system or a dry-
running protection system where there are great
variations in the level.
• Use guide and deflector plates for the fluid intake.
If the water jet reaches the surface of the water, air
will be introduced into the fluid, which can accumu -
late in the pipe system. This can result in inadmis-
sible operating conditions and to deactivation of
the entire system.
• Check that the available planning documentation
(installation plans, layout of the operating space,
intake ratios) is complete and correct.
• Also observe all regulations, rules, and legal require-
ments for working with and underneath heavy sus-
pended loads. Wear appropriate protective clothing/
equipment.
• Please also observe the applicable national accident
prevention regulations and trade association safety
provisions.
5.3.1. Maintenance work
After a storage period of more than 6 months, the
following maintenance work must be carried out
before installation:
• Rotate impeller
• Check oil level in the sealing chamber
Rotate impeller
1. Position the pump horizontally on a firm surface.
Make sure that the pump cannot fall over and/or
slip.
2. Carefully and slowly reach into the hydraulics hous-
ing from below and rotate the impeller.
WARNING: sharp edges!
Sharp edges can form on the impellers and
hydraulic opening. There is a risk of injury! Wear
the necessary protective clothing, such as pro-
tective gloves.