Installation - salmson LRL Serie Manual De Instalación Y Puesta En Servicio

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7.1

Installation

Preparation
Installing pumps on a base
Positioning/alignment
32
WARNING! Risk of injury and damage to property!
Danger of damage due to incorrect handling.
• Never set up the pump unit on unfortified surfaces or surfaces
which cannot bear loads.
• The pump should only be installed after completion of all welding and
soldering work and, if necessary, flushing of the pipe system. Dirt can
cause the pump to fail.
• Standard pumps must be protected from the weather and installed in
a frost/dust-free, well-ventilated environment which is not poten-
tially explosive.
• Pump versions K1 and K4 are also suitable for outdoor installation
(also see chapter 5.1 "Type key" on page 28).
• To ensure protection against the ingress of dirt, foreign substances,
etc. the flanges of the outlets on the suction- and pressure-side are
sealed with a sticker when delivered. These are to be removed prior to
installation.
• Install the pump in a place that is easy to access so that subsequent
inspections, maintenance (e.g. mechanical seal) or replacement is
easily possible.
Setting up the pump on a flexibly mounted foundation can improve
the insulation of the building against structure-borne noise. In order
to protect the pump when stationary against bearing damage due to
vibration from other units (e.g. in a system with several redundant
pumps), each pump should be set up on its own foundation. If pumps
are installed on a floor between two storeys, then elastic mounting is
always strongly recommended. Particular care must be taken with
variable speed pumps. It is recommended - taking into account all
constructionally and acoustically relevant criteria - that a qualified
building acoustics specialist be given the task of configuration and
design where necessary.
The flexible elements shall be selected according to the lowest exci-
tation frequency. This is usually the rotation speed. In the case of var-
iable speed, assume the lowest rotation speed. The lowest excitation
frequency should be at least twice as much as the inherent frequency
of the flexible mounting, so that an insulation level of at least 60% is
achieved. Therefore, the spring resilience of the flexible elements
must be smaller the lower the rotation speed. In general, it is possible
to use natural cork panels at a rotation speed of 3000 rpm and more,
rubber/metal elements at a rotation speed between 1000 and
3000 rpm and coil springs at a rotation speed below 1000 rpm. In
terms of the configuration of the foundation, care should be taken to
avoid any acoustic bridges being formed by plaster, tiles or secondary
structures since these will invalidate or significantly reduce the insu-
lating effect. In the case of pipe connection, it is necessary to take
account of the flexure of the flexible elements under the weight of
the pump and foundation. Planning engineers and installation com-
panies must take care to ensure that the pipe connections to the
pump are completely stress-free in their design and unable to exert
any gravitational or vibration influences on the pump housing what-
soever. The use of expansion joints represents a good idea in this
regard.
• A hook or eyelet with the corresponding bearing capacity is to be
installed vertically above the pump (for the total weight of the pump:
see catalogue/data sheet), to which hoisting gear or similar aids can
be attached when conducting maintenance or repair work on the
pump.
Salmson 12/2017