Installing The Pump - Wilo NL Serie Instrucciones De Instalación Y Funcionamiento

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5.1.2 Discharge line
For flow regulation, a valve must be installed
behind the pump. If non-return valves are used,
they should close smoothly. Pressure shocks
must be avoided.
5.1.3 Inlet and outlet connections
The various connecting points are shows in the
drawings. (See Annex, chapter 12, point 12.1).
5.1.4 Pressure control
For consistent control of pressure, it is advisable
to install in the pipe work a measuring point in
front of, and behind the pump.
6. Unpacking, Storage, Handling
6.1 Safety measures
CAUTION !
• Never stay below the suspended load.
• Keep a safe distance while the load is being trans-
ported.
• Use only suitable slings, which are in good condi-
tion.
• Adjust the length of the slings in such a way that
the pump and/ or the pumpset is suspended hori-
zontally.
• Do not use the eyebolts on the pump components
for lifting the assembled pump or the complete
set.
• Do not remove documents, which are attached to
the pump.
• Do not remove the protection covers from the
pump suction/discharge. Otherwise, there may be
a risk of contamination.
6.2 Unpacking
Before unpacking, a visual check of the packing
is recommended. If transport damage is visible,
the extent should be noted on the receipt or on
the delivery note. Potential claims must be lod-
ged immediately with the carriers or the insuran-
ce company.
6.3 Temporary storage
If the pump or the pump unit is not installed
immediately after delivery, it must be stored free
from vibration in a dry room.
6.4 Handling
The pump or pump set must be lifted and hand-
led as shown in the following sketches.
26
Fig. 4a
Bare shaft pump
Fig. 4b
Pump set
6.5 Protection against corrosion
A protective coating is applied to the pumps.
Remove it before starting-up (see chapter 6.6).
6.6 Removal of protective coating
To remove the protective coating, the pump
should be filled and drained several times using
appropriate agents, e.g. solvent naphtha, diesel
oil or alkaline detergent. Flush with water, if
necessary.
The pump must be installed and started up
immediately afterwards.
6.7 Renewing corrosion protection
If the pump has been supplied with a protective
coating and has to be stored, a new protective
coating should be applied after six months.
For suitable protective coatings, please contact
us.

7. Installing the pump

CAUTION! Installations and electrical connection
must be made by authorised personnel according
to the local standards!
WARNING!
Only appropriately authorised personnel may
carry out this work.
WARNING!
Electrical connections must be made according
to the European Regulations and Directives for
the Standards in Industry and in compliance with
the instructions of the local power supply utili-
ties of the country concerned.
WILO AG 09/2007