Storage And Operating Conditions; Sound Pressure Level; Safety; Electrical Connection - Grundfos Unilift AP35B Original Installation And Operating Instructions

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 domestic waste
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 wa-
ter closets
Maximum particle size [mm]
The pump must not be used in or at swim-
ming 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.

1.2 Storage and operating conditions

Storage temperature: Down to –30 °C.
Minimum liquid
temperature:
Maximum liquid
temperature:
Installation depth:
pH value:
Density:
Viscosity:
Technical data:
Unilift Unilift
AP35B AP50B
35 50
0 °C.
+40 °C.
Maximum 7 metres below
liquid level.
Between 4 and 10.
Maximum 1100 kg/m³.
Maximum 10 mm²/s.
See pump nameplate.

1.3 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.

2. Safety

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

3. Electrical connection

Note: Depending on local regulations, a pump with
10 metres of mains cable must be 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 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.
As a precaution, the pump must be con-
nected to a socket with earth connection.
The installation must be fitted with an
earth leakage circuit breaker (ELCB) with
a tripping current < 30 mA.
The pump must be connected to an exter-
nal mains switch with a minimum contact
gap of 3 mm in all poles. If the pump is not
installed close to the switch, this must be
of a lockable type.
Three-phase pumps must be connected to an exter-
nal motor starter with differential release. The nomi-
nal 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 protec-
tion.
Note: If the motor is overloaded, it will stop automat-
ically. When it has cooled to normal temperature, it
will restart automatically.
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