Grundfos MULTILIFT M User manual

MULTILIFT
M, MD, MLD, MOG, MDG
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

MULTILIFT
English (GB)
Installation and operating instructions ..................................5
Български (BG)
Упътване за монтаж и експлоатация.................................41
Čeština (CZ)
Montážní a provozní návod ........................................78
Deutsch (DE)
Montage- und Betriebsanleitung ....................................114
Dansk (DK)
Monterings- og driftsinstruktion .....................................150
Eesti (EE)
Paigaldus- ja kasutusjuhend.......................................186
Español (ES)
Instrucciones de instalación y funcionamiento...........................222
Suomi (FI)
Asennus- ja käyttöohjeet .........................................261
Français (FR)
Notice d'installation et de fonctionnement..............................297
Ελληνικά (GR)
Οδηγίες εγκατάστασης και λειτουργίας................................333
Hrvatski (HR)
Montažne i pogonske upute .......................................370
Magyar (HU)
Telepítési és üzemeltetési utasítás ..................................406
Italiano (IT)
Istruzioni di installazione e funzionamento .............................442
Lietuviškai (LT)
Įrengimo ir naudojimo instrukcija ....................................478
Latviešu (LV)
Uzstādīšanas un ekspluatācijas instrukcija .............................514
Nederlands (NL)
Installatie- en bedieningsinstructies ..................................550
Polski (PL)
Instrukcja montażu i eksploatacji....................................586
3
Table of contents

Português (PT)
Instruções de instalação e funcionamento .............................622
Română (RO)
Instrucţiuni de instalare şi utilizare...................................659
Srpski (RS)
Uputstvo za instalaciju i rad .......................................695
Svenska (SE)
Monterings- och driftsinstruktion ....................................731
Slovensko (SI)
Navodila za montažo in obratovanje .................................767
Slovenčina (SK)
Návod na montáž a prevádzku .....................................803
Türkçe (TR)
Montaj ve kullanım kılavuzu .......................................840
Українська (UA)
Інструкції з монтажу та експлуатації ................................876
中文 (CN)
安装和使用说明书 ..............................................913
日本語 (JP)
取扱説明書...................................................947
Appendix A..................................................982
4MULTILIFT
Table of contents

English (GB) Installation and operating instructions
Original installation and operating instructions
Table of contents
1. General information ............. 5
1.1 Hazard statements .............. 5
1.2 Notes ..................... 6
2. Product introduction ............ 6
2.1 Product description .............. 6
2.2 Construction..................11
2.3 Intended use .................13
2.4 Pumped liquids ................13
2.5 Identification..................13
3. Receiving the product............16
3.1 Transportation.................16
3.2 Inspecting the product ............16
3.3 Scope of delivery ...............16
4. Mechanical installation ...........17
4.1 Installation requirements ...........18
4.2 Installation sketches .............19
4.3 Connecting the inlet pipe, MULTILIFT M,
MD, MOG, MDG ...............22
4.4 Connecting the inlet pipe, MULTILIFT
MLD ......................23
4.5 Installing the outlet pipe, MULTILIFT M,
MD, MLD ...................23
4.6 Installing the outlet pipe connections,
MULTILIFT MOG, MDG ...........24
4.7 Further connections..............24
5. Electrical connection ............25
5.1 Connecting a level sensor ..........25
5.2 Wiring connections ..............27
6. Starting up the product ...........28
7. Setting the product .............29
7.1 Further settings ................29
7.2 Start level ...................29
7.3 Factory settings ................29
8. Servicing the product ............30
8.1 Maintenance intervals ............30
8.2 Performing a maintenance check ......30
8.3 Mechanical maintenance ...........31
8.4 Performingelectrical maintenance ......33
8.5 Contaminated lifting station or
components ..................33
9. Taking the product out of operation ....33
10. Fault finding .................34
10.1 Warning and alarm codes on the display
of the level controller .............34
10.2 The pump(s) does/do not run.........35
10.3 The sensor signal is out of range.......35
10.4 The pump(s) is/are starting/stopping too
frequently even if there is no inflow .....35
10.5 One pump starts sometimes without
visible reason .................35
11. Technical data ................36
11.1 Lifting station .................36
11.2 Collecting tank ................36
11.3 Pump .....................36
11.4 Techincal data for level controller.......36
11.5 MULTILIFT M .................37
11.6 MULTILIFT MD, MLD .............38
11.7 MULTILIFT MOG, MDG ...........39
12. Disposing of the product ..........40
13. Document quality feedback ........40
1. General information
Read this document before you install the
product. Installation and operation must
comply with local regulations and accepted
codes of good practice.
1.1 Hazard statements
The symbols and hazard statements below may
appear in Grundfos installation and operating
instructions, safety instructions and service
instructions.
DANGER
Indicates a hazardous situation which, if
not avoided, will result in death or serious
personal injury.
WARNING
Indicates a hazardous situation which, if
not avoided, could result in death or
serious personal injury.
CAUTION
Indicates a hazardous situation which, if
not avoided, could result in minor or
moderate personal injury.
The hazard statements are structured in the following
way:
SIGNAL WORD
Description of the hazard
Consequence of ignoring the warning
• Action to avoid the hazard.
5
English (GB)

1.2 Notes
The symbols and notes below may appear in
Grundfos installation and operating instructions,
safety instructions and service instructions.
Observe these instructions for explosion-
proof products.
A blue or grey circle with a white graphical
symbol indicates that an action must be
taken.
A red or grey circle with a diagonal bar,
possibly with a black graphical symbol,
indicates that an action must not be taken
or must be stopped.
If these instructions are not observed, it
may result in malfunction or damage to the
equipment.
Tips and advice that make the work easier.
2. Product introduction
2.1 Product description
TM082539
The MULTILIFT range offers pre-assembled complete
lifting stations designed to collect and dispose of
domestic wastewater into the sewer system. The
lifting stations are supplied complete with collecting
tanks, single- or three-phase submersible pump(s),
level sensor, level controller and connection
accessories.
The following variants are available:
MULTILIFT Collecting
tank size Pump(s)
Non-
return
valve
M 93 l 1 ✔
MD 130 l 2 ✔
MLD 270 l 2 ✔
MOG 93 l 1
grinder pump -1)
MDG 93 l 2
grinder pumps -1)
1) Available as an accessory.
6
English (GB)

2.1.1 Pump
The pump impellers are designed as free-flow vortex
impellers ensuring almost unchanged performance
throughout the entire life of the pump. The stator
housing of the motor is made of cast iron with a 150
µm epoxy coating. The pump has a mechanical shaft
seal.
Single-phase motors are protected by a thermal
switch in the windings. MULTILIFT M, MD and MLD
run via a capacitor inside the controller cabinet.
MULTILIFT MOG and MDG run via starting and
operating capacitors inside the controller cabinet.
Three-phase motors are protected by a thermal
switch in the windings and an additional thermal
circuit breaker in the controller cabinet to cut out the
motor in case of overload.
If the phase sequence for three-phase pumps is
wrong, the controller indicates fault and prevents the
pump(s) from starting.
MULTILIFT MOG, MDG: The pump has a grinder
which grinds solid particles into small pieces so that
they can easily flow through pipes of a small
diameter.
MULTILIFT M, MD, MLD: If the
motor is overloaded, it stops
automatically. When it has cooled to
normal temperature, it restarts
automatically.
MULTILIFT MDG lifting stations have two
pumps, thus providing a standby pump in
case of pump failure or additional pump
performance if the inlet exceeds the
performance of one pump.
Always install MULTILIFT MDG lifting
stations if the wastewater flow must not be
interrupted.
Performance curves are available in the data booklet,
which you can download via the QR code or link
below:
QR98288126
http://net.grundfos.com/qr/i/98288126
2.1.2 Level sensor
The piezoresistive pressure sensor placed in the
controller is connected via a hose to a pressure tube
in the tank. The screw cap where the hose is
connected includes a connection for a DN 100 tube.
This tube, the pressure tube, extends down into the
tank. The rising liquid level compresses the air inside
the pressure tube and hose, and the piezoresistive
sensor transforms the changing pressure into an
analog signal. The control box uses the analog signal
to start and stop the pump and to indicate high-level
alarm. The pressure tube is fixed underneath the
screw cap and can be taken out for maintenance,
service and cleaning the inside of the tube. An O-ring
ensures tightness.
MULTILIFT M, MD, MLD: The hose is supplied in
lengths of 4 or 10 m.
MULTILIFT MOG, MDG: The hose is supplied in a
length of 10 m.
The hose must be connected to the controller.
TM050332
Screw cap with hose and DN 100 tube
7
English (GB)

2.1.3 Level controller
The level controller supplied with the lifting stations is
either LC 231 or LC 241.
See the documentation for the level controller for
further details.
Data booklet:
QR98288126
http://net.grundfos.com/qr/i/98288126
LC 231 installation and operating instructions
Single pump unit:
QR99381576
http://net.grundfos.com/qr/i/99381576
Dual pump unit:
QR99480674
http://net.grundfos.com/qr/i/99480674
LC 241 installation and operating instructions
Single pump unit:
QR99381670
http://net.grundfos.com/qr/i/99381670
Dual pump unit:
QR99480978
http://net.grundfos.com/qr/i/99480978
Related information
6. Starting up the product
7.1 Further settings
10.1 Warning and alarm codes on the display of the
level controller
11.4 Techincal data for level controller
8
English (GB)

2.1.4 Collecting tank
The gas-, odour- and pressure-tight collecting tank is
made of wastewater resistant polyethylene (PE) and
has all necessary ports for the connection of inlet
pipes, outlet pipe, vent pipe and a manually operated
diaphragm pump, which is available as an accessory.
MULTILIFT M, MD, MOG, MDG
The collecting tank has a turnable, eccentric disk in
the back allowing adjustment of the inlet to any height
between 180 and 315 mm above the floor. The most
common heights are marked beside the inlet.
The MULTILIFT M collecting tank offers three
horizontal inlets in the sides (2 × DN 100 and 1 × DN
50) and two vertical inlets at the top of the tank (1 ×
DN 150 and 1 × DN 50). The centres of the horizontal
inlets are 180 mm (DN 50) and 250 mm (DN 150)
above the floor.
The MULTILIFT MD collecting tank offers four
horizontal inlets in the sides (2 × DN 100 and 2 × DN
50) and three vertical inlets at the top of the tank (2 ×
DN 150 and 1 × DN 50). The centres of the horizontal
inlets are 120 mm (DN 50) and 250 mm (DN 150)
above the floor.
The MULTILIFT MOG and MDG collecting tank offers
four horizontal inlets in the sides (2 × DN 100 and 2 ×
DN 50) and two vertical inlets at the top of the tank (1
× DN 150 and 1 × DN 50). The centres of the
horizontal inlets are 115 mm (DN 50) and 250 mm
(DN 150) above the floor.
The side and back inlets 180 and 250 mm above the
floor are for direct connection to wall-hung or floor-
standing toilet according to EN 33 and EN 37. Further
sanitary appliances can be connected to the other
ports.
MULTILIFT MLD
The collecting tank offers one vertical inlet (DN 50) at
the top of the tank and one vertical inlet (DN 150) in
the stepped part of the tank.
Tank volume
The tank volume and effective volume (volume
between start and stop) for MULTILIFT lifting stations
appear from the following table:
Type of
tank
Inlet level
[mm]
Total tank
volume [l]
Effective
tank
volume [l]
MULTILIFT
M, MD
180
130
49
250 69
315 86
MULTILIFT
MLD 560 270 190
MULTILIFT
MOG, MDG
180
93
23
250 37
315 50
Setting to the relevant start inlet level must
be made during startup phase via the
setup menu.
The first step after power supply
connection is a startup phase with level
setting.
To minimise sedimentation, the tank
bottom is chamfered to lead the
wastewater to the pump.
2.1.5 Motor cable
The motor cable is fitted to the motor via a cable
entry. The enclosure class is IP68.
MULTILIFT M, MD, MLD: The length of the cable is
either 4 or 10 m.
MULTILIFT MOG, MDG: The length of the cable is 10
m.
9
English (GB)

2.1.6 Shaft seal
2.1.6.1 Shaft seal, MULTILIFT M, MD, MLD
The pump has three shaft seals. The oil chambers in
between are filled for life and therefore require no
maintenance. For replacement in case of service, see
service instructions.
2.1.6.2 Shaft seal, MULTILIFT MOG, MDG
The grinder pump incorporates two shaft seal variants
which are both of the cartridge seal type.
Pumps up to and including 1.5 kW have a silicon
carbide/silicon carbide (SiC/SiC) mechanical shaft
seal as primary seal and a lip seal as secondary seal.
In connection with service, the lip seal and
mechanical shaft seal are supplied as one
replaceable unit ready for fitting. The components can
be replaced individually. See service instructions for
the pump.
Pumps as from 2.6 kW have a double seal consisting
of a SiC/SiC mechanical seal as primary seal and a
carbon/aluminium oxide mechanical shaft seal as
secondary seal. The components can be replaced
individually. See service instructions for the pump.
2.1.7 Grinder system, MULTILIFT MOG, MDG
The grinder system consists of two parts, a stationary
grinder ring and a rotating grinder head. See the
figure below.
The grinder ring is secured to the pump housing by
means of a bayonet socket and fixed in
the correct position with a screw. The grinder head is
secured to the shaft by means of the screw that
keeps the impeller in position. To adjust or
replace the grinder system, see service instructions
for the pump.
TM053722
Grinder system
2.1.8 Non-return valve, MULTILIFT M, MD, MLD
The DN 80 non-return valve includes a drain screw to
lift up the internal valve flap in order to drain the outlet
pipe in case of maintenance or service. The valve is
designed and tested according to EN 12050-4. See
the figure below.
Loosen the locking nut before turning the
drain screw.
TM051530
Non-return valve
Related information
2.2 Construction
10
English (GB)

2.2 Construction
The following gives a description of the components:
TM051520
MULTILIFT M, front and rear view
4
12
10
14
11
6
13
2
1
8
1
7
9
3 5
TM051521
MULTILIFT MD, front and rear view
5
3
8
10
6
2
1
7
9
11
4 10 15
TM051522
MULTILIFT MLD, front and rear view
56
2
1
11
13
10
7
9
4
3
14
12
14
12
TM052125
MULTILIFT MOG, front and rear view
11
English (GB)

56
2
4
3
12
14
12
14
7
10
1
9
11
13
TM052124
MULTILIFT MDG, front and rear view
Pos. Description
1MULTILIFT M, MD, MLD: Pump
MULTILIFT MOG, MDG: Pump with grinder system and vortex impeller
2MULTILIFT M, MD, MLD: Lifting eye for pumps
MULTILIFT MOG, MDG: Lifting bracket
3 Nameplate
4 Vent port, DN 70 (outer diameter, 75 mm), open
5 Screw cap for pressure tube and tank inspection opening
6 Vertical inlet, DN 150 (seal is accessory)
7 Fixing point
8Non-return valve with inspection cover and drain screw to lift up the valve flap. See fig. Non-
return valve.
9
MULTILIFT M, MD, MLD: Outlet adapter flange, DN 80, to pipe ∅110 with flexible connecting
piece and two clamps.
MULTILIFT MOG, MDG: Oval flange for outlet
10 Collecting tank with carrying handle moulded into tank body
11 Port, 1 1/2", for manually operated diaphragm pump
12 Horizontal inlet, DN 100 (seal is accessory)
13 Adjustable inlet disk, DN 100 (DN 150 optional as accessory)
14 Side or top inlet, DN 50 (seal is accessory)
15 Separate inspection cover
Related information
2.1.8 Non-return valve, MULTILIFT M, MD, MLD
12
English (GB)

2.3 Intended use
MULTILIFT M is mainly designed for one-family
houses. It may also be used in light commercial
applications provided that other sanitary appliances
are available in case of maintenance service or failure
to MULTILIFT M.
MULTILIFT MD and MLD are designed for multi-
family houses, offices, schools, hotels, restaurants,
public areas and other commercial buildings and
similar industrial applications.
MULTILIFT MOG is designed for one-family houses
while MULTILIFT MDG is designed for multi-family
houses, offices, schools, hotels, restaurants, public
areas and other commercial buildings.
2.4 Pumped liquids
The Grundfos MULTILIFT M, MD, MLD, MOG and
MDG 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 and faeces from below
sewer level.
Do not pump rainwater with the MULTILIFT 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, contact Grundfos.
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.
• Wastewater from sanitary installations situated
above the flood level (this must 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.
- To drain greasy wastewater with MULTILIFT
M, 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, contact
Grundfos.
High temporary inflow can cause
short-time high-level alarm. Alarm
delay can be set in the controller
menu.
- To drain greasy wastewater with MULTILIFT
MD, MLD or MDG, use a grease separator
according to EN 1825-2 between a canteen or
commercial kitchen and the lifting station.
Abrasive particles, for example high
content of sand, in the pumped liquid
will reduce the life of the pump and
especially the grinder system.
2.5 Identification
2.5.1 Type key
Example: MLD.22.3.4
Code Designation Explanation
MMULTILIFT lifting
station Type range
[ ] Standard tank Tank size
L Large tank
[ ] One pump
Number of pumps
D Two pumps
OG One grinder pump
DG Two grinder pumps
22 Power [W] Output power, P2 /
100 [W]
1 Singe-phase motor Number of phases
3 Three-phase motor
2 2-pole motor Number of poles
4 4-pole motor
13
English (GB)

2.5.2 Nameplate, lifting station
The nameplate is located on the tank.
1
2
16
17
15
14
13
12
7
8
9
10
6
5
4
3
11
TM047639
Pos. Description
1 Type designation
2Model, product number, production site,
production code, year and week, counter
3 Operating mode
4 Frequency
5 Rated voltage
6 Full-load current
7 Motor input power, P1
8Reference number for the declaration of
performance
9 Approvals
10
Year of first declaration of performance,
notified body number and applied standard
(Construction Products Regulation)
11 Production country
12 Weight
13 Max. ambient temperature
14 Max. liquid temperature
15 Max. head
16 Min. head
17 Max. flow rate
2.5.3 Nameplate, motor, MULTILIFT M, MD, MLD
7
8
9
6
5
4
1
2
311
12
13
14
15
10
16
TM033618
Pos. Description
1 Product number, Model
2 Production code (year and week)
3 Frequency
4 Number of phases
5 Rated voltage
6 Full-load current
7 Input power
8 Shaft power
9 Approvals
10 Serial number
11 Operating mode
12 Power factor
13 Rated speed
14 Insulation class
15 Weight
16 Production country
14
English (GB)

2.5.4 Nameplate, motor, MULTILIFT MOG, MDG
1
2
3
4
5
6
7
8
9
10
11
12
13
15
14
16
17
18
19
20
21
22
23
24
25
TM046534
Pos. Description
1 Type designation
2 Product number
3 Production code (year and week)
4 Max. head
5 Number of phases
6 Rated input power
7 Rated speed
8 Rated voltage, Δ
9 Rated voltage, Y
10 Frequency
11 Weight without cable
12 Operating mode
13 CE marking
14 Enclosure class according to IEC
15 Max. installation depth (not filled out, see
nameplate for lifting station)
16 Max. flow rate (not filled out, see nameplate
for lifting station)
17 Max. liquid temperature
18 Output power
19 Power factor
20 Rated current, Δ
21 Rated current, Y
Pos. Description
22 Starting capacitor
23 Operating capacitor
24 Insulation class
25 Production country
15
English (GB)

3. Receiving the product
3.1 Transportation
Do not stack the product.
WARNING
Falling objects
Death or serious personal injury
‐Secure the product during transport to
prevent it from tilting or falling down.
CAUTION
Back injury
Minor or moderate personal injury
‐Use lifting equipment.
CAUTION
Crushing of feet
Minor or moderate personal injury
‐Wear safety shoes when moving the
product.
The motor lifting bracket is only intended
for lifting the pump. Never lift or lower the
lifting station by means of the lifting
bracket.
Lift the lifting station by the collecting tank
lifting brackets.
3.2 Inspecting the product
Before installing the product, do the following:
1. Check that the product is as ordered.
2. Check that no visible parts have been damaged.
3. If parts are damaged or missing, contact your
local Grundfos sales company.
3.3 Scope of delivery
3.3.1 MULTILIFT M, MD
Grundfos MULTILIFT M (one pump) and MD (two
pumps) lifting stations are supplied complete with
collecting tank, non-return valves, a sensor unit with
cable and one or two pumps with cable, both
connected to the level controller. The controller
includes a power supply cable with plug.
An accessories bag containing the following items is
also included:
• 1 × installation and operating instructions
• 1 × quick guide for controller menu
• 1 × outlet adapter flange, DN 80, with connecting
piece, DN 100 (outer diameter, 110 mm)
• 1 × flexible hose, DN 100, and two clamps to
connect the outlet pipe
• 1 × flexible hose, DN 70, and two clamps to
connect the vent pipe
• 2 × screw and expansion anchor for tank fixation
• 3 × screw and washer for fastening a pipe plug in
the inlet disk, if required
• 1 × socket seal, DN 100
• 1 × socket seal, DN 50, for diaphragm pump
connection or inlet, DN 50
• 1 × gasket kit, DN 80, 4 bolts M16, nuts and
washers (galvanised).
3.3.2 MULTILIFT MLD
Grundfos MULTILIFT MLD lifting stations are supplied
complete with collecting tank, butterfly-non-return
valves, a sensor unit with cable and two pumps with
cable, both connected to the level controller. The
controller includes a power supply cable with plug.
An accessories bag containing the following items is
also included:
• 1 × installation and operating instructions
• 1 × quick guide for controller menu
• 1 × outlet adapter flange, DN 80, with connecting
piece, DN 100 (outer diameter, 110 mm)
• 1 × flexible hose, DN 100, and two clamps to
connect the outlet pipe
• 1 × flexible hose, DN 70, and two clamps to
connect the vent pipe
• 4 × screw and expansion anchor for tank fixation
• 1 × socket seal, DN 150
• 1 × flexible hose connection with two clamps, DN
50, for diaphragm pump connection or inlet, DN
50
• 1 × gasket kit, DN 80, 4 bolts M16, nuts and
washers (galvanised).
16
English (GB)

3.3.3 MULTILIFT MOG, MDG
Grundfos MULTILIFT MOG (one pump) and
MULTILIFT MDG (two pumps) lifting stations are
supplied complete with collecting tank, a sensor unit
with cable and one or two pumps with cable,
connected to the level controller. The controller
includes a power supply cable with plug.
An accessories bag containing the following items is
also included:
• 1 × installation and operating instructions
• 1 × quick guide for controller menu
• 1 × oval outlet flange, 1 1/4" (MOG) 2 × oval outlet
flanges, 1 1/4" (MDG)
• 1 × flexible hose, DN 70, and two clamps to
connect the vent pipe
• 2 × screw and expansion anchor for tank fixation
• 3 × screw and washer for fastening a pipe plug in
the inlet disk, if required
• 1 × socket seal, DN 100
• 1 × socket seal, DN 50, for diaphragm pump
connection or inlet, DN 50.
4. Mechanical installation
WARNING
Explosive environment
Death or serious personal injury
‐Do not install the product in hazardous
environments.
WARNING
Biological hazard
Death or serious personal injury
‐In existing installations, install an
isolating valve before the tank inlet if
necessary.
‐If no isolating valve is installed, wear
protective clothing.
CAUTION
Back injury
Minor or moderate personal injury
‐Use lifting equipment.
CAUTION
Biological hazard
Minor or moderate personal injury
‐According to EN 12056-4, venting must
take place above the roof.
CAUTION
Fall hazard
Minor or moderate personal injury
‐Do not step on the lifting station.
CAUTION
Crushing of feet
Minor or moderate personal injury
‐Wear safety shoes when moving the
product.
Ensure that weight from the inlet, outlet
and ventilation pipes does not rest on the
tank. Long pipe sections and valves must
be supported.
Do not stand on the lifting station.
When installing the MULTILIFT lifting station, ensure
all local regulations covering venting and access to
the stations are observed.
17
English (GB)

4.1 Installation requirements
The guidelines for correct mechanical installation of
lifting stations are according to EN 12056-4.
• Install the lifting station in a properly lit and vented
room with 60 cm free space around all parts to be
serviced and operated.
• Provide a pump sump below the floor level. If a
lifting station is installed in a basement with the
risk of penetrating groundwater, we
recommend (and in certain countries it is required)
to install a drainage pump in a separate pump
sump below floor level in order to drain the room.
See fig. Installation sketch.
The collecting tank, pump and cables may
be flooded (max. 2 m for 7 days).
The controller must be installed in a dry
and well-ventilated place.
• All pipe connections must be flexible to reduce
resonance.
• Lifting stations must be secured against uplift and
twist.
• All outlet pipes from lifting station, diaphragm
pump and drainage pump must have a bend
above the local backwater level. The highest point
of the bend/reversed water seal must be above
street level.
• For outlet pipes, DN 80 and upwards, install an
isolating valve in the outlet pipe. Also provide an
isolating valve in the inlet line.
• Surface water must not be discharged into the
lifting station inside the building. It must have its
own pumping station outside the building.
• Lifting stations must be provided with an approved
non-return valve according to EN 12050-4.
• The volume of the outlet pipe above the non-
return valve up to the backwater level must be
smaller than the effective tank volume.
• In general, a lifting station for black wastewater
must be vented above roof level. However, it
is permitted to lead the ventilation, as a secondary
ventilation, into the main building ventilation
system. Special vent valves (accessory) must be
placed outside the building.
• If the wastewater is discharged into a collecting
line, this collecting line must have a filling ratio of
at least h/d = 0.7. The collecting line must be at
least one nominal diameter bigger after the outlet
pipe connection.
• The controller must be placed in a flood-safe
place and be equipped with an alarm.
• Use a diaphragm pump for simple, manual
draining of the collecting tank in case of pump
failure (not obligatory).
Related information
4.2 Installation sketches
18
English (GB)

4.2 Installation sketches
4 7 2 1 6 5
3
TM051864
Installation sketch, MULTILIFT M and MD
3
4
6 5
TM051865
Installation sketch, MULTILIFT MLD
19
English (GB)

4 6 2 1 5
3
TM052143
Installation sketch, MULTILIFT MOG and MDG
Pos. Accessories Product number
1 Socket seal, DN 100 97726942
2 Socket seal, DN 50 98079669
3 Diaphragm pump, 1 1/2" 96003721
4 PVC isolating valve, DN 100 96615831
5
Cast-iron isolating valve, DN 80 M, MD, MLD: 96002011
1 1/2" complete pre-assembly outlet pipework (See detailed pipework
below)
MOG: 98085356
MDG: 98085358
6 Gasket kit, DN 80, with bolts, nuts and washers 96001999
7 Inlet disk with socket seal, DN 150, for replacement 98079681
20
English (GB)