Xylem Flygt 2075, Инструкция по установке, эксплуатации и обслуживанию, Страница: 31 / 60

Service item Action
Starter
equipment
1. Check the condition and functionality.
2. Contact an electrician, if necessary.
Insulation
resistance in the
stator
1. Check the insulation between:
• Phase–phase on the stator
• Phase–earth (ground)
The insulation should be > 1 megohm. Use a 1000-VDC megger to test the
insulation.
2. If the resulting value is < 1 megohm, then contact an authorized service shop.
Major overhaul
For a major overhaul, take this action in addition to the tasks listed under Inspection.
Service item Action
Support and main bearing Replace the bearings with new bearings.
Mechanical seal Replace with new seal units.
Change the oil
A paraffin oil with viscosity close to ISO VG32 is recommended. The pump is delivered
from the factory with this type of oil. In applications where poisonous properties are of less
concern, a mineral oil with viscosity up to ISO VG32 can be used.
Empty the oil
1. Lay the pump on its side.
Lock the pump with supports to prevent it from rolling over.
2. Version code 590/690: Remove the screw and lock washer.
3. Remove the oil screw.
There are two oil screws. Either screw can be used for drainage, but it is easier to drain
the oil if both oil screws are removed.
WARNING:
The oil housing may be pressurized. Hold a rag over the oil plug to
prevent oil from spraying out.
4. Turn the pump so that the oil hole faces downwards and let the oil run out.
Maintenance
Flygt 2075 Installation, Operation, and Maintenance Manual 29