Installation and operating instructions WILO Mather and Platt – VT pumps 26
8.
Installation
(Fig: 3, Pg. No. 5)
(Motor / Pump coupling system)
DANGER! Risk of getting crushed!
The installation or removal of the product must not
be performed by one person alone. Measures should
be taken to bar persons from standing beneath a
suspended load. Furthermore, it is also prohibited to
move suspended loads over exposed workplaces
where people are present. The fastening devices
should be adapted to the conditions at hand
(weather, hooking system, load, etc.) Use suitable
fastening devices to handle the weight of the
product.
WARNING! Danger of personal injury!
The installation and electrical connection should be
performed only by qualified personnel in compliance
with local regulations. This section provides
instructions on the recommended methods of
installing pumping sets on to concrete foundations.
Careful attention must be paid to the customer and
contractor’s installation drawings during the
installation procedures to ensure that the pumping
set is accurately positioned on the correct datum
levels. The existing accident prevention regulations
must be observed
WARNING! Danger of electric shock!
Any hazards from electrical current should be ruled
out. Any instructions from local or general directives
[e.g. IEC, VDE etc.] or directives of the local
electricity supply companies must be observed
8.1 Sump Verification (Fig: 4&6 Pg. No. 5&6)
• Pump sump intake bay should be designed in such a way that
flow evenly distributed and vortex free. Enough back wall and
side wall clearances should be left for the pump to perform
satisfactorily. Baffles formed inlet and other flow improving
arrangements should be employed in case of restricted or
constrained sump conditions.
• The special attention must be paid to sump design. When
two or more nos. of pumps are operated in combinations of
working & standby conditions. It is recommended that when
space & site constraints do not allow the suction sump design
as per recommendation of HIS, the suction sump design
should be verified by a model study.
• Whenever model study has been carried out previously for
optimizing sump design, its recommendation regarding
corrective structures should be fully implemented.
• Care should be always taken to maintain minimum
submergence condition for satisfactory performance of
pump. Cavitations, vibrations etc. can occur in absence of the
same.
• Sufficient bottom clearance should be maintained below
suction bell as per HIS.
• It is recommended to install a strainer to keep unwanted
solids out of the pump. Strainer may be installed at the
suction bell end. These strainers usually introduce a
moderate drop in pressure when choked up. Suction bell
strainers typically clear themselves by back flow in the
pump column when the unit is stopped. For large pumps,
trash racks and screens are typically provided in intake
structure.
• It is recommended that a strainer is with a filter surface of
at least 2.5 times the suction bell dia. and more in case of
firefighting applications.
8.2 Necessary steps before pump installation
• Before any installation work is carried out, the machine
should be inspected for damage that may have
occurred during handling, transport & storage.
• Installation within a building: install the pump in a dry,
well ventilated and frost-resistant room.
• Pumping machinery should have adequate access and
working room for maintenance operations. Adequate
overhead space for lifting devices and working
clearance must be provided.
• Installation outside a building (outdoor installation):
• Install the pump with a suitable protection to avoid
rainfalls strong wind and particles which can damage
the pump or motor.
• Avoid exposure of the pump to direct sunlight.
• An appropriate solution to avoid frost must be
implemented.
CAUTION! Risk of material damage!
Ensure sufficient ventilation/heating if the ambient
temperature exceeds/falls below the permitted limit
values.
• Carry out all welding and soldering work prior to the
installation of the pump.
• Provide shut off valve and non-return valve in pump
delivery line.
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