KSB Amarex N, Operating Manual

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5 Installation at Site
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Amarex N
5.4.1.4 Sensors
DANGER
Operating an incompletely connected pump set
Explosion hazard!
Damage to the pump set!
▷
Never start up a pump set with incompletely connected power connection
cables or non-operational monitoring devices.
CAUTION
Incorrect connection
Damage to the sensors!
▷ Observe the limits stated in the following sections of this manual when
connecting the sensors.
The pump set is equipped with sensors designed to prevent hazards and damage to
the pump set.
Measuring transducers are required for analysing the sensor signals supplied. Suitable
devices for 230V~ can be supplied by KSB.
NOTE
Reliable and safe operation of the pump within the scope of our warranty is only
possible if the sensor signals are properly analysed as stipulated in these operating
instructions.
All sensors are located inside the pump set and are connected to the power cable.
For information on wiring and core marking please refer to the wiring diagrams.
The individual sensors and the limit values to be set are described in the following
sections.
5.4.1.5 Motor temperature
DANGER
Insufficient cooling
Explosion hazard!
Winding damage!
▷ Never operate an explosion-proof pump set without operational temperature
monitoring.
Standard pump sets (versions UL and WL):
Two bimetal switches (terminals 21 and 22, max. 250 V~/2 A) serve as temperature
control devices which open when the winding temperature is too high.
Opening of the switch contacts must result in the pump set cutting out. Automatic
re-start is permissible.
WARNING
Incorrect electrical connection
Electric shock!
▷
Adequately insulate conductor 20.
Conductor 20 has no function on standard pump sets.
However, it can be live and must, therefore, be insulated or connected to a dummy
terminal.