Installation and operating instructions Salmson-Rocsan SDL 51
MAINTENANCE AND REPAIR English
intervals and work shown in DIN EN 12056‐4
must be adhered to.
8.2.1. Intervals for normal operating conditions
2 years
• Visual inspection of the power supply cable
• Visual inspection of accessories
• Visual inspection of the coating and housing for
wear
• Functional inspection of all safety and monitoring
devices
• Inspection of the switchgear/relays used
• Oil change
NOTE
If a pencil electrode is installed to monitor the
sealing chamber, the oil is changed based on
the indicator.
15000 operating hours or after 10 years at the
latest (motor version "P" only)
• General overhaul
8.2.2. Intervals for harsh operating conditions
Under harsh operating conditions, the specified
maintenance intervals must be shortened ac-
cordingly. In this case, contact Salmson customer
service. If using the pump under harsh condi-
tions, we also recommend signing a maintenance
contract.
Harsh operating conditions include:
•
A large proportion of fibrous material or sand in
the fluid
• Turbulent inlet (e.g. due to air entry, cavitation)
•
Strongly corrosive fluids
•
Strongly gassing fluids
• Unfavourable duty points
• Operating states subject to 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 3
phases. In normal operation, these values remain
constant. Slight fluctuations depend on the char
-
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 pump 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 Salmson
customer service.
8.3. Maintenance work
Before carrying out maintenance work:
• Disconnect the pump 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 the power supply cable
The power supply cables must be checked for
blisters, cracks, scratches, abrasion and/or crush-
ing. If any damage is detected, the pump must be
decommissioned immediately and the damaged
power supply cable must be replaced.
The cables may only be replaced by Salmson
customer service or an authorised or certified
service workshop. The pump may only be start-
ed up again once the damage has been properly
remedied.
8.3.2. Visual inspection of accessories
Accessories must be checked to ensure they are
properly fitted and function correctly. Loose and/
or faulty accessories must be repaired or replaced
immediately.
8.3.3. 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
Salmson customer service.
8.3.4. Functional inspection of safety and monitoring
devices
Monitoring devices include the temperature sen-
sors in the motor, humidity electrodes, overload
relay, overvoltage relay, etc.
• Motor protection, overvoltage relay and other
triggers can generally be triggered manually for
test purposes.
• To check the pencil electrode or the temperature
sensor, the pump has to be cooled to the ambient
temperature and the electrical connection for the
monitoring equipment has to be disconnected in
the switchgear. The monitoring equipment can
then be checked with an ohmmeter. The follow-
ing values should be measured:
•
Bimetallic strip: Value = “0” passage
•
Pencil electrode: This value must approach
infinity. If the value is low, there is water in the
oil. Also observe the instructions of the option-
al evaluation relay.
If there are larger deviations, consult the man-
ufacturer.
8.3.5. Inspection of the switchgear/relays used
See the relevant installation and operating in-
structions for a description of the individual work
steps for inspecting the switchgear/relay. Faulty
devices must be replaced immediately as they
provide no protection to the pump.
8.3.6. Oil change in sealing chamber
The sealing chamber has a hole for draining and
filling the chamber.
