15
4LPPT70EN - 5/2023
The pump must be installed on a sufficiently strong
foundation with fastening bolts or threads for fastening bolts.
A sufficiently strong and level foundation for the pump must
be built of either concrete or steel. The foundation must be
higher than the floor level so that the pump does not get wet
if water damages occur. The pump must be secured using
the mounting holes on the pump base plate. Other types of
securing are forbidden. Ensure that the carrying capacity of
the foundation is sufficient, taking into consideration the
weight of the pump and potential loads during use.
The pump must be installed with the base plate
downwards.
Table 3.
Bolts for the pump foundation and their
tightening torques.
Model
Bolt
Tightening torque (Nm)
LPP-T32, T40, T50, T65
& T80
(LPP-T 1.25, T 1.5, T 2, T
2.5 & T 3)
M24 x 70
660
Always tighten the bolts in a crosswise sequence and
double check to make sure correct torque is reached.
CAUTION!
Crushing hazard. Do not remove any transport supports
before the pump has been secured to the foundation.
When the foundation is ready for installation, install the
pump in the following order:
• Lift the pump onto the pedestal as instructed in Chapter
3.
• Fasten the pump in place with foundation bolts, and
tighten the bolts to the torque given in Table 3 (‘Bolts for
the pump foundation and their tightening torques’).
• Remove the transport supports, if any.
If the pump is installed in dirty surroundings where its
motor is susceptible to fluid splashes, or dust, the motor
must be equipped with protection. An unclean motor
can overheat and become damaged.
For gear motors with an IEC flange, the motor is
installed to the gear only after the pump has been
secured to the foundation. The motor must be installed
in accordance with the manufacturer’s instructions.
4.3 Electrical connection
The motor connections must be performed in accordance
with the manufacturer’s instructions. The motor power
supplies must be equipped in accordance with safety
regulations, at least with maintenance and emergency stop
switches, motor overload protection, and fuses.
WARNING!
Electrocution hazard. Before installation or maintenance,
ensure that the supply voltage has been turned off.
Only an authorised electrician is permitted to perform
the required connection work.
4.4 Piping connections
General
The rotation direction set as standard for the pump is
anticlockwise when the pump is viewed from the front (with
the transparent maintenance window).
Especially in pumping of heavy sludge, the minimum
flow velocity must be taken into consideration, to
prevent sedimentation of the medium.
Connected piping should meet the following requirements:
• To minimise pressure loss, the nominal size of the piping
should be at least one size larger than the nominal size of
the pump.
• The pump should be connected to the piping with
flexible, pressure-proof hoses to facilitate maintenance
work and to dampen the pressure shocks (pulsation)
generated by the pump. The amount of pulsation
(pressure change) depends on the following factors: the
counter pressure of the piping, the capacity of the piping,
the flow velocity, equipment installed in the piping, and
the rotation speed of the pump.
• The strength of the pipeline supports should be taken
into consideration, as the vibration in the piping may
cause strain in the pump housing.
• If the pressure shocks of the pump disturb the pumping
process, the pulsation can be dampened with special
pulsation dampers installed in the pipeline.