Wilo Wilo-Drain SP, Installation And Operating Instructions Manual

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ENGLISH
12
6.2 FUNCTION
Self priming principle :
Pump casing design is specific and includes two internal chambers.
Impeller turns in the priming chamber that always contains liquid and
creates a suction pressure that is used to empty suction line from air.
The mixture of air and liquid is accelerated outward the priming
chamber to the separation chamber. Liquid flows down back to the
priming chamber while air is separated upward in the discharge line.
When suction pipe is completely filled with liquid, the pumps starts
working like a standard design centrifugal pump.
Thanks to the position of the pump inlet and to the integrated non
return valve the pump casing is always filled with liquid. Pump can
restart and prime even after long periods at a standstill.
Lubrication cartridge :
Back of the mechanical seal is continuously lubricated thanks to an
automatic self operated greasing cartridge (quench). Lubrication
of mechanical seal reduces overheating of mechanical seal faces during
priming time and increases sealing lifetime.
The cartridge is a long-term grease dispenser activated by a hydrogen
gas producing drycell. The lubricator contains 125 ml of grease
dispensed during a period of 12 months. The operating limits are min -
20°C and max +55°C. Weight of the full lubricator is app. 190g and empty
app. 75g. The dispensed product is a special water-repellent grease.
When it is switched on, the integrated electronic device regulates grease
dispersion according to selected period. (see chapter « start-up ») :
Cartridge is screwed in upper part of casing cover (mechanical seal
housing) :
7 INSTALLATION AND ELECTRICAL
CONNECTION
7.1 LOCATION
Equipments that will be used in a ATEX zone should be
certified accordingly and should fully comply with applicable
regulations.
The choice of the pump location should permit a proper cooling of the
motor and should respect following limits :
Location will be chosen to ensure space reservation for maintenance
and inspection.
Check that there is ample overhead for lifting and that lifting devices are
available.
7.1.1 FOUNDATION
Pump set can be installed on various types of foundations (on a concrete
ground, on a foundation concrete block, on a steel framework, …). It is
the responsibility of the end user to select proper pump foundation
type. Noise level and vibrations transmitted by the machine depend on
the quality of foundation.
Following rules are general instructions that should be respected :
- Base frame or pump matting plate should be fastened to a rigid
foundation with no risk of distortion while the pump is running.
- Make sure that the foundation concrete is of sufficient strength (min
quality X0 to DIN 1045). Generally, the weight of foundation is around 3
times the pumpset weight. With pump set dimensions and concrete
density it is then possible to calculate the dimensions of the required
foundation block.
- Surface under pumpset should be flat and should not create any
distortion of base plate after tightening of foundations bolts. If surface
quality is not sufficient, add shims between ground and base plate.
Distortion on base plate surface should be limited to 0,4mm/m after the
baseplate is definitively fastened to foundations.
Coupling alignment is checked before shipment (pumps and
motor deliver ed on a common baseplate) If coupling is not
correctly aligned after installation works are done this indicates that the
baseplate has become twisted and leveling should be corrected by re-
shimming.
Even if foundation works have been done with care, it is necessary to
check coupling alignment after the baseplate is definitively secured to
the foundation.
7.1.2 ANCHORING
Chemical anchoring device should be preferred to fasten a baseplate on
an existing foundation.
Anchor bolts can be used if foundation block is to be built.
1 – Anchor bolt
2 – Baseplate
3 – Concrete foundation block
Folded steel fabricated baseframes will be grouted to insure its rigidity.
Using of shrink free grout is the most efficient. Grouting ensures correct
positioning of the baseframe and reduces vibrations transmission to civil
work. Foundation work surface preparation and leveling of baseframe
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