Maintenance Intervals; Maintenance Work - Wilo RexaBloc RE Notice De Montage Et De Mise En Service

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• Texaco Pharmaceutical 30* or 40*
All oil types marked with "*" are approved for use
with foods in accordance with "USDA-H1".
Filling quantities
The filling quantity for the sealing chamber is
1600 ml.
8.1.2. Overview of grease
The following lubricating grease can be used in
accordance with DIN 51818/NLGl 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 ac-
cording to the load on the hydraulics. Regardless
of the specified maintenance intervals, the hy-
draulics 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
2 years
• Visual inspection of the coating and housing for
wear
• Functional check of pencil electrode (available as
an option) for sealing chamber control
• Oil change in sealing chamber
• Check the leakage chamber for leaks
NOTE
If sealing chamber control is installed, the main-
tenance interval corresponds to the indicator!
15000 operating hours or after 10 years at the
latest
• General 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 Wilo customer service.
If using the hydraulics under harsh conditions, we
also recommend signing a maintenance contract.
Harsh operating conditions include:
• A large proportion of fibrous material or sand in
the fluid
• Strongly corrosive fluids
• 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 char-
42
acteristics of the fluid. The 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 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 hydraulics to cool down and clean them
thoroughly.
• 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 housing parts, contact
Wilo customer service.
8.3.2. Functional check of pencil electrode (available
as an option) for sealing chamber control
To check the pencil electrode, the hydraulics has
to be cooled to the ambient temperature and
the electrical connection for the pencil electrode
has to be disconnected in the switchgear. The
monitoring equipment can then be checked with
an ohmmeter. The following values should be
measured:
• This value must approach infinity. If the value
is low, there is water in the oil. Also observe the
instructions of the optional evaluation relay.
If there are larger deviations, consult Wilo
customer service.
8.3.3. Oil change in sealing chamber
The sealing chamber has separate openings for
draining and filling the chamber.
RISK of injury from hot and/or pressurised
operating fluid!
After the hydraulics is switched off, the oil is
still hot and pressurised. This can cause the
screw plug to be ejected and hot oil to escape.
There is a risk of injury or burns! First allow
the oil to cool down to ambient temperature.
Fig. 4: Screw plugs
D- Drain hole screw plug
D+ Filler hole screw plug
1. If you can place a tank beneath the hydraulics
to collect the oil, you do not need to remove the
hydraulics.
MAINTENANCE AND REPAIR
WILO SE 12-2015 V05 DIN A4