General Description; Applications; Transportation And Storage - Grundfos Multilift M Serie Instrucciones De Instalación Y Funcionamiento

3. General description

Grundfos Multilift M lifting stations are supplied complete with
collecting tank, pump, level sensor, LC 221 controller, non-return
valve and connection accessories.
The following gives a description of the components.
Fig. 1 Multilift M front and rear view
Pos. Description
1 Pump
2 Lifting eye for pump
3 Nameplate
4 Venting port, DN 70 (outer diameter, 75 mm), open
Screw cap for pressure tube and tank inspection
5
opening
6 Vertical inlet, DN 150 (seal is accessory)
7 Fixing point
Non-return valve with inspection cover and drain
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screw to lift up the valve flap. See fig. 4.
Discharge adapter flange, DN 80, to pipe ∅110 with
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flexible connection piece and two clamps
Collecting tank with carrying handle moulded into
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tank body
11 Port, 1 1/2", for manually operated diaphragm pump
12 Horizontal inlet, DN 100 (seal is accessory)
Adjustable inlet disk, DN 100 (DN 150 optional as
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accessory)
14 Side or top inlet, DN 50 (seal is accessory)

3.1 Applications

Grundfos Multilift M lifting stations are designed for the collection
and pumping of domestic wastewater with no free flow to sewer
level. Grundfos Multilift M lifting stations are designed for the
collection and pumping of the following liquids:
• domestic wastewater, including grey wastewater without
faeces, black wastewater with faeces (discharge from water
closets)
• sludge-containing water.
The lifting stations are capable of pumping liquids containing
fibres, textiles, faeces, etc., below sewer level from minor
buildings such as private dwellings, flats, holiday homes, etc.
Multilift M is mainly designed for single-family houses, but it may
also be used in light commercial applications provided other
sanitary appliances are available in case of maintenance, service
or failure to Multilift M.
Do not pump rainwater with the Multilift M lifting stations for these
two reasons:
• The motors of the lifting stations are not designed for
continuous operation, which may be necessary in case of
heavy rainfall.
• Rainwater must not be discharged into a lifting station inside a
building according to EN 12056-4.
If in doubt, please contact Grundfos for advice.
Do not discharge the following substances/types of wastewater
via a lifting station:
• solid matter, tar, high content of sand, cement, ash, cardboard,
debris, garbage, etc.
• wastewater from sanitary installations situated above the flood
level (this should be drained away via a free flow drainage
system according to EN 12056-1).
• wastewater containing hazardous substances such as greasy
wastewater from large-scale catering establishments.
For drainage of greasy wastewater, use a grease separator
according to EN 1825-2 and a two-pump lifting station.
When connecting a backwash filter from a swimming pool to
Multilift M, check the inflow parameters. In case of doubt, please
contact Grundfos.
High temporary inflow can cause short-time
high-level alarm. Alarm delay can be set in the
Note
controller menu.

4. Transportation and storage

Warning
The lifting eye is only intended for lifting the
pump. Never lift or lower the lifting station by
means of the lifting eye.
Lift the lifting station by the collecting tank.
Note
For long periods of storage, the LC 221 controller must be
protected against moisture and heat.
After a long period of storage, the pump should be inspected
before it is started up again. Make sure that the impeller can
rotate freely.
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