KSB Amarex User Manual

7 Servicing/Maintenance
44 of 82
Amarex
2573.820/02-EN
7.2 Maintenance/inspection
KSB recommends the following regular servicing schedule:
Table17: Overview of maintenance work
Maintenance interval Maintenance work For details see ...
Every 4000 operating hours; at
least once a year
Insulation resistance measurement (ðSection7.2.1.3,Page44)
Checking the power cables (ðSection7.2.1.2,Page44)
Visual inspection of the lifting chain/
lifting rope
(ðSection7.2.1.1,Page44)
Checking the sensors (ðSection7.2.1.4,Page45)
Changing the lubricant (ðSection7.2.2.1.4,Page47)
Checking the bearings (ðSection7.4.4,Page51)
Every 5 years General overhaul
7.2.1 Inspection work
7.2.1.1 Checking the lifting chain/rope
ü The pump set has been lifted out of the pump sump and cleaned. (Applies to
installation typeK only.)
1. Inspect the lifting chain/rope as well as their fasteners for any visible damage.
2. Replace any damaged components by original spare parts.
7.2.1.2 Checking the power cables
Visual inspection ü The pump set has been lifted out of the pump sump and cleaned.
1. Inspect the power cables for visible damage.
2. Replace any damaged components by original spare parts.
Checking the earth
conductor
ü The pump set has been lifted out of the pump sump and cleaned.
1. Measure the resistance between the earth conductor and chassis ground.
The electrical resistance must be lower than 1Ω.
2. Replace any damaged components by original spare parts.
DANGER
Defective earth conductor
Electric shock!
▷ Never switch on a pump set with a defective earth conductor.
7.2.1.3 Measuring the insulation resistance
Measure the insulation resistance of the motor winding during annual maintenance
work.
ü The pump set has been disconnected in the control cabinet.
ü Use an insulation resistance measuring device.
ü The recommended measuring voltage equals 500 V (maximum permissible
1000V).
1. Measure the winding to chassis ground.
To do so, connect all winding ends together.
2. Measure the winding temperature sensors to chassis ground.
To do so, connect all core ends of the winding temperature sensors together
and connect all winding ends to chassis ground.

KSB Amarex Specifications

General

Material	Cast iron, stainless steel
Operating mode	Continuous
Type	Submersible Pump
Application	Sewage
Explosion protection	Available with explosion protection
Frequency	50 Hz, 60 Hz
Impeller Type	Multi-vane