Wilo Norma V Series, Installation And Operating Instructions Manual

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ENGLISH
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2.4.2 SAFETY INSTRUCTIONS FOR THE EQUIPMENT
Quick temperature changes of the liquid contained in the pump
should be avoided. A thermal shock may drive to damages or destruction
of components, creating leakages.
Ensure that pump flanges do not support excessive external forces
when fastening piping flanges or after increasing of liquid temperature.
Do not use pump as a support for piping. If expansion joints are used
they should be equipped with axial movement limiting device.
Before checking direction of rotation make sure that no parts could
be ejected from shafts (pins, keys, coupling element …). Several pump
types will be damaged if started in the wrong direction of rotation
(screwed impeller design). The flexible coupling of a pump set must be
disconnected before first start up to check direction of rotation.
Unless otherwise indicated and if it is possible, pump should be started
with discharge valve partially opened to avoid overloading of the motor.
The pump outlet control valve may need to be adjusted to reach the
requested duty point.
Never run the pump with a closed suction valve. The valves located
on suction side of pump must always remain opened while pump is
running.
Running continuously the pump at zero flow or below the
recommended minimum flow will cause damage to the pump.
Never run the pump out of its operating limits. Operating the
pump at higher flow rates may overload the motor and cause
cavitations.
Operating the pump at lower flow rates may cause a reduction of
ball bearings/bearing lifetime, overheating in pump sealing chamber,
instability and cavitations/vibration.
Never remove protecting covers or coupling guard when pump is
ready to run. Those parts can only be removed during maintenance
operations.
2.4.3 SAFETY INSTRUCTIONS FOR INSPECTION AND
INSTALLATION WORK
The operator must ensure that all inspection and installation work
are carried out by authorized and qualified personnel. The operators
must be sufficiently informed and must know the content of these
instructions and of the incorporated materials instructions before any
operation is carried out on pumps and accessories.
Access to the product must only be carried out when pump is at a
standstill. It is mandatory that the procedure described in the
installation and operating instructions for shutting down the pumpset
are fully respected.
All protections and security devices must be reactivated or
switched on immediately after works are ended.
2.5 MODIFICATION OF EQUIPMENT AND USE
OF SPARE PARTS
Modifying the product is only permitted after agreement of WILO. Use
of genuine spare parts and accessories authorized by the manufacturer
ensure safety and proper work of the pump.
2.6 IMPROPER USE :
The operating safety of the product is only guaranteed for conventional
use and in accordance with the technical offer and this operating
instructions. The limit values indicated in the relevant catalogue/data
sheet must not be exceeded.
2.7 PUMPSET DELIVERED WITHOUT MOTOR
When pumpset is delivered without any motor (a CE integration
certificate has been supplied with the pump) it is the end-user’s
responsibility to ensure that all regulation requirements are respected to
get a CE marking.
Certification of the complete pump set will be from integrator
responsibility. He will ensure that aIl specifications listed in this
instructions are fully respected.
2.8 SECURITY INSTRUCTIONS TO BE APPLIED
ON EQUIPMENTS USED IN POTENTIALLY
EXPLOSIVE ATMOSPHERE
This chapter contains operating instructions that have to be
considered when using the pump in a potentially explosive atmosphere.
The ATEX additive supplied with the pump will be considered as well.
THIS CHAPTER INDICATES SUPPLEMENTARY INSTRUCTIONS TO :
- Avoid excessive surface temperature,
- Avoid build up of explosive mixture,
- Avoid sparks creation,
- Prevent leakages,
- Ensure proper maintenance to avoid hazard.
The following instructions for the pump and pump units shall be
followed when the equipment is installed in a potentially explosive
atmosphere. Ex-proof protection is ensured only if the pump unit and
supplied accessories are installed according instruction given in this
instruction and operating manual. Both electrical and non-electrical
equipment must meet the requirements of European Directive ATEX
94/9/EC.
2.8.1 SPECIFIC MARKING INSTRUCTIONS FOR ATEX
An example of ATEX equipment marking is shown hereunder for
information. Motor ATEX marking is not concerned as it is engraved with
its dedicated markings for electrical equipment. Dedicated ATEX
classification is engraved on pump nameplate and indicated in the ATEX
additive :
II 2Gc T1-T4 (X)
With :
équipement GROUP :
II = non mining equipment