KSB Amarex User Manual

6 Commissioning/Start-up/Shutdown
38 of 82
Amarex
2573.820/02-EN
CAUTION
Start-up against a closed shut-off element
Increased vibrations!
Damage to mechanical seals and bearings!
▷ Never operate the pump set against a closed shut-off element.
1. Fully open the discharge line shut-off element, if any.
2. Start up the pump set.
6.2 Operating limits
DANGER
Non-compliance with operating limits
Damage to the pump set!
▷ Comply with the operating data specified in the data sheet.
▷ Never operate an explosion-proof pump set at ambient temperatures or fluid
temperatures exceeding those specified in the data sheet and/or on the name
plate.
▷ Never operate the pump set outside the limits specified below.
6.2.1 Frequency of starts
CAUTION
Excessive frequency of starts
Risk of damage to the motor!
▷ Never exceed the specified frequency of starts.
To prevent high temperature increases in the motor and excessive loads on the
motor, sealing elements and bearings, do not exceed the following number of starts
per hour.
Table16: Frequency of starts
Motor rating Maximum frequency of starts
[kW] [Starts/hour]
≤ 7,5 30
> 7,5 10
These values apply to mains start-up (DOL, autotransformer, soft starter). This
limitation does not apply to operation on a frequency inverter.
6.2.2 Operation on the power supply mains
DANGER
Permissible tolerances for operation on mains power exceeded
Explosion hazard!
▷ Never operate an explosion-proof pump (set) outside the specified range.
The mains voltage and mains frequency may fluctuate around the rated values as
defined for zoneB to IEC60034-1. The voltage difference between the individual
phases must not exceed 1%.

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