Grundfos KPC, Installation And Operating Instructions Manual

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2.3 Electrical connection
• Check that the supply voltage and frequency of
the installation site correspond to the values
stated on the nameplate.
• Make sure that it is possible to make a good
earth connection.
• Pumps with plug: connect the plug to the power
outlet.
• Pumps without plug: connect the pump
permanently to the fixed wiring as described
below.
3. Starting up the product
3.1 Manual operation
Start and stop the pump via an external main switch.
To eliminate the risk of dry running, check the water
level regularly during operation. This can for instance
be done by means of an external level controller.
In order for the pump to be able to self-prime when
started, the water level must be at least 25 mm.
When the pump sucks water, it can pump down to 20
mm water level.
3.2 Automatic operation with float switch
During automatic operation, pumps with a float
switch will start and stop, depending on the water
level and the float switch position and cable length.
3.2.1 Forced pump operation
If the pump is used to drain water below the stop
level of the float switch, the float switch can be kept
in a higher position by fixing it to the outlet pipe.
During forced pump operation, check the water level
regularly to prevent dry running.
3.3 Thermal protection
If the pump is running without water, or if it is
otherwise overloaded, the built-in thermal switch will
cut out.
When the motor has cooled to normal temperature, it
will restart automatically.
Carry out the electrical connection
according to local regulations.
DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before
starting any work on the product. Make
sure that the power supply cannot be
accidentally switched on.
DANGER
Electric shock
Death or serious personal injury
- Connect pumps without plug
permanently to the fixed wiring via an
external main switch with a minimum
contact gap of 3 mm in all poles.
DANGER
Electric shock
Death or serious personal injury
- The pump must be earthed.
- The protective earth of the power outlet
must be connected to the protective
earth of the pump. The plug must
therefore have the same PE connection
system as the power outlet. If not, use a
suitable adapter.
DANGER
Electric shock
Death or serious personal injury
- The installation must be fitted with a
residual current device (RCD) with a
tripping current less than 30 mA.
DANGER
Electric shock
Death or serious personal injury
- If the pump is used for cleaning or other
maintenance of swimming pools,
garden ponds or similar places, make
sure that the pump is supplied through a
residual-current circuit breaker with a
rated residual operating current of 30
mA.
WARNING
Flammable material
Death or serious personal injury
- Do not use the pump for flammable
liquids, such as diesel oil, petrol or
similar liquids.
DANGER
Electric shock
Death or serious personal injury
- Do not use the pump in swimming
pools, garden ponds or similar places if
there are people in the water.