Storage And Operating Conditions; Sound Pressure Level; Safety; Electrical Connection - Grundfos AP12 Installation And Operating Instructions Manual

The pump is suitable for:
Applications
Groundwater lowering
Pumping in drainage pits
Pumping in surface
water pits with inflow
from roof gutters, shafts,
tunnels, etc.
Emptying of ponds,
tanks, etc.
Pumping of fibre-
containing waste water
from laundries and
industries
Pumping of surface
water from septic tanks
and sludge treating
systems
Pumping of domestic
waste water without
discharge from water
closets
Pumping of domestic
waste water with
discharge from water
closets
Maximum particle size
[mm]
Warning
The pump must not be used in or at
swimming pools, garden ponds, etc.
when there are persons in the water.
Incorrect application of the pump (e.g. resulting in
blocking of the pump) and wear are not covered by
the warranty.

2.2 Storage and operating conditions

Storage temperature: Down to –30 °C.
Minimum liquid
temperature:
Maximum liquid
temperature:
Installation depth:
pH value:
Density:
Viscosity:
Technical data:
8
AP12 AP35 AP50
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12 35 50
0 °C.
+55 °C continuously.
Up to +70 °C for periods not
exceeding 3 minutes. Then
the pump must cool down.
Maximum 10 metres below
liquid level.
Between 4 and 10.
Maximum 1100 kg/m³.
Maximum 10 mm²/s.
See pump nameplate.

2.3 Sound pressure level

The sound pressure level of the pump is lower than
the limiting values stated in the EC Council Directive
2006/42/EC relating to machinery.

3. Safety

Warning
Pump installation in wells must be
carried out by specially trained
persons.

4. Electrical connection

Depending on local regulations, a pump
with 10 metres of mains cable must be
Caution
used if the pump is used as a portable
pump for different applications.
The electrical connection should be carried out in
accordance with local regulations.
The pump must be connected to an external mains
switch. If the pump is not installed close to the
switch, this must be of a lockable type.
The operating voltage and frequency are marked on
the pump nameplate. Please make sure that the
motor is suitable for the electricity supply on which it
will be used.
Warning
As a precaution, the pump must be
connected to a socket with earth
connection. The permanent installation
must be fitted with an earth leakage
circuit breaker (ELCB) with a tripping
current < 30 mA.
Three-phase pumps must be connected to an
external motor starter with differential release and
with a minimum contact gap of 3 mm. The set
nominal current of the motor starter must correspond
to the electrical data marked on the pump
nameplate.
If a level switch is connected to a three-phase pump,
the motor starter must be magnetically operated.
Single-phase pumps incorporate thermal overload
protection and require no additional motor
protection.
Warning
If the motor is overloaded, it will stop
automatically. When it has cooled to
normal temperature, it will restart
automatically.