6.2
Operating limits
DANGER
Non-compliance with operating limits
Damage to the pump set!
▷
Comply with the operating data indicated in the data sheet.
▷
Avoid operation against a closed shut-off element.
▷
Never operate an explosion-proof pump set at ambient and fluid temperatures
exceeding those specified in the data sheet or on the name plate.
▷
Never operate the pump set outside the limits specified below.
6.2.1 Temperature of the fluid handled
The pump set is designed for transporting liquids. The pump set is not operational
under freezing conditions.
CAUTION
Danger of frost/freezing
Damage to the pump set!
▷
Drain the pump set or protect it against freezing.
Refer to the maximum permissible fluid and ambient temperature on the name plate
and in the data sheet.
6.2.2 Frequency of starts
CAUTION
Excessive frequency of starts
Damage to the motor!
▷
Never exceed the specified frequency of starts.
To prevent high temperature increases in the motor, do not exceed the following
number of start-ups per hour.
Table 14: Frequency of starts
Interval
Maximum frequency of starts
[no. of starts]
per hour
30
per year
5000
These values apply to mains start-up (direct or with star-delta contactor,
autotransformer, soft starter). The limit does not apply to frequency inverter
operation.
6.2.3 Minimum level of fluid handled
DANGER
Pump set running dry
Explosion hazard!
▷
Never allow an explosion-proof pump set to run dry!
CAUTION
Fluid level below the specified minimum
Damage to the pump set by cavitation!
▷
Never allow the fluid level to drop below the specified minimum.
6 Commissioning/Start-up/Shutdown
Amarex® N
33 of 66
Goodnal STP ST041 Biological Treatment (KSB WAS PUMP 1 & 2 PU-0530-010 OM Instructions) Vendor Manual
Q-Pulse Id VM381
Active 29/10/2013
Page 35 of 76
