Wilo Wilo-Rexa NORM, Инструкция по установке и эксплуатации

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26 WILO SE 04/2021 DIN A4
English MAINTENANCE AND REPAIR
measures specified on the notice at the working
premises and notify a doctor immediately!
• Make sure that the necessary tools and materials
are available. Order and cleanliness ensure safe
and smooth work on the hydraulics. After working
on the hydraulics, remove any used cleaning
materials and tools from the pump. Store all
materials and tools in their proper place.
• Operating fluids should be collected in suitable
containers and disposed of properly. Always wear
appropriate protective clothing when performing
maintenance and repair work. This must also be
disposed of properly.
8.1. Operating fluid
8.1.1. Overview of white oil
The sealing chamber is filled with white oil that is
potentially biodegradable.
When changing the oil, we recommend the
following oil types:
• ExxonMobile: Marcol 52
• ExxonMobile: Marcol 82
• Total: Finavestan A 80 B (NSF-H1 certified)
8.1.2. Overview of lubricating grease
The following lubricating greases can be used in
accordance with DIN 51818 / NLGI Class 3:
• Esso Unirex N3
8.2. Maintenance intervals
To ensure reliable operation, various maintenance
tasks must be carried out regularly.
The maintenance intervals must be specified
according to the load on the hydraulics! Regard-
less of the specified maintenance intervals, the
hydraulics or installation must be checked if
strong vibrations occur during operation.
Also note the maintenance intervals and main-
tenance work for the motor. See the operating
and maintenance manual for the motor!
8.2.1. Intervals for normal operating conditions
NOTICE
Note You should also follow the maintenance
intervals specified in the operating and mainte -
nance manual for the motor and coupling!
Annually
• Visual inspection of the coating and housing for
wear
• Regrease the pump bearings
• Vibration measurement
• Visual inspection of coupling
2 years
• Functional check of pencil electrode for sealing
chamber monitoring (if applicable)
• Oil change in the sealing chamber
• Check the leakage chamber for leaks
NOTICE
If sealing chamber monitoring is installed, the
maintenance interval corresponds to the
indicator!
15,000 operating hours or after 10 years at the
latest
• Complete overhaul
8.2.2. Intervals for harsh operating conditions
Under harsh operating conditions, the specified
maintenance intervals must be shortened accord-
ingly. In this case, contact the Wilo customer
service. When using the hydraulics under harsh
conditions, we also recommend signing a mainte-
nance contract.
Harsh operating conditions include:
• A large proportion of fibrous material or sand in
the fluid
• Strongly corrosive media
• Strongly gassing fluids
• Unfavourable duty points
• Operation at risk from water hammers
8.2.3. Recommended maintenance measures to en-
sure smooth operation
We recommend regular inspections of the current
consumption and the operating voltage in all
phases. In normal operation, these values remain
constant. Slight fluctuations depend on the
characteristics of the fluid. Current consumption
can provide an early indication of damage and/
or malfunctions in the impeller, bearings and/or
motor, which can be rectified. Larger voltage fluc -
tuations strain the motor winding and can cause
the motor to break down. Regular inspections
can therefore largely prevent major secondary
damage and reduce the risk of total breakdown.
We recommend the use of remote monitoring
for regular inspections. Please contact the Wilo
customer service.
8.3. Maintenance work
Before carrying out maintenance work:
• Disconnect the motor from the power and secure
it against being switched on inadvertently.
• Allow the pump to cool down and clean it thor-
oughly.
• Make sure that all the operationally relevant parts
are in good condition.
8.3.1. Visual inspection of coating and housing for
wear
The coatings and housing parts must not show
any signs of damage. If there is visible damage
to the coatings, repair the coating accordingly.
If there is visible damage to the housing parts,
contact the Wilo customer service.