Maintenance Schedule; Maintenance Work - Homa H 500 Serie Originalbetriebsanleitung

6.2. Maintenance schedule

Before commissioning or after prolonged storage:

Testing of insulation resistance

Fill level check of the seal chamber – operating fluid must reach up to the lower edge of the fill
opening

Axial face seal must be checked for damage.
Monthly:

Check of the power input and voltage

Check of the used switchgears for resistance, sealed space control etc.
Every six months:

Visual inspection of the power supply leads

Visual inspection of the cable holders and the wiring

Visual inspection of accessories, such as for example suspension device, lifting devices, etc.
3,000 operating hours:

Visual check for pumps with oil barrier chamber

Visual check for pumps without oil barrier chamber
8,000 operating hours or after 2 years at the latest:

Testing of insulation resistance

Operating fluid change in seal chamber

Inspection and repair, if necessary, of the coating.

Functional test of all safety and monitoring systems.
15,000 operating hours or after 5 years at the latest:

General factory overhaul
When used with highly abrasive and/or aggressive media, the maintenance intervals shorten.

6.3. Maintenance work

Check of the power input and voltage
The power input and voltage for all three phases must be checked regularly. In normal operation mode this
remains constant. Slight fluctuations depend on the properties of the pumped medium. Based on the power input
damages and/or malfunctions of the impeller/propeller, bearing and/or motor can be detected and repaired early.
Major secondary damages can be prevented with this and the risk of a total failure can be reduced.
Check of the used switchgears for resistance, sealed space control etc.
Check the used switchgears for correct function. Defective devices must be replaced immediately, since the do
not ensure protection of the machinery. Instructions for the test procedure must be followed (operating
instructions for the respective switchgears).
Testing of insulation resistance
To check the insulation resistance, the power supply cable must be disconnected. Then, the resistance can be
measured using an insulation tester (measuring DC voltage is 1000 volts). The following values must be met:
During commissioning, the insulation resistance of 20 MΩ must be met or exceeded. For additional
measurements, the value must be larger than 2 MΩ. Insulation resistance is too low: Moisture may have
penetrated into the cable and/or the motor.
Do not connect machine; consult the manufacturer!
Visual inspection of the power supply leads
The power inlet leads must be inspected for bubbles, cracks, scratches, scour marks and/or crushing zones. If
damages are detected, the damaged power inlet lead must be replaced immediately.
The leads may only be replaced by the manufacturer or an authorised/certified service workshop. The
machinery must only be started after appropriate repair of the damage!
Visual inspection of the cable holders (biners) and the wiring (traction cable)
If the machine is used in basins/shafts the hoisting wires/cable holders (biners) and the wiring are subject to
constant wear and tear. Regular inspections are required to prevent a complete wear and tear of the hoisting
wires/cable holders (biners) and/or wiring and a complete damage to the power cable.
The hoisting wires/cable holders (biners) and the wiring must be replaced immediately if there are slight
signs of tear and wear!
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