Grundfos Multifit MD Series, Multifit MLD Series Installation And Operating Instructions Manual

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Multilift MD, MLD

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

Other languages

http://net.grundfos.com/qr/i/98127059

English (GB) Installation and operating instructions

Caution

Note

English (GB)

Original installation and operating instructions

TABLE OF CONTENTS

1. Symbols used in this document

2. Scope of delivery

2.1 MD

2.2 MLD

3. General description

3.1 Applications

4. Transportation and storage

5. Product description

5.1 Lifting station

5.2 LC 221 controller

6. Operating LC 221 controller

6.1 Description of display

6.2 Setup menu

6.3 Information menu

6.4 Description of fault indications

7. Installation of lifting station

7.1 General description

7.2 Guidelines for installation of lifting station

7.3 Procedure for installation of lifting station

8. Installation of LC 221 controller

8.1 Location

8.2 Mechanical installation

8.3 Electrical connection

8.4 Setting of LC 221

8.5 Wiring diagrams

9. Startup

10. Maintenance and service

10.1 Mechanical maintenance

10.2 Motor

10.3 Electrical maintenance

10.4 Cleaning the level sensor

10.5 Contaminated lifting station or components

11. Fault finding

12. Technical data

12.1 Lifting station

12.2 Collecting tank

12.3 Pump

12.4 LC 221 controller

13. Disposal

Warning Prior to installation, read these installation and

operating instructions. Installation and operation must comply with local regulations and accepted codes of good practice.

Warning The use of this product requires experience with and

knowledge of the product. Persons with reduced physical, sensory or mental capabilities must not use this product, unless they are under supervision or have been instructed in the use of the product by a person responsible for their safety. Children must not use or play with this product.

Page

10 12 13 14

16 17 17

19 19 20 20 21

23 23 23 24 24

26 26 26 26

1. Symbols used in this document

Warning If these safety instructions are not observed, it may

2 2

4 6

result in personal injury.

Warning These instructions must be observed for

explosion-proof pumps.

If these safety instructions are not observed, it may result in malfunction or damage to the equipment.

Notes or instructions that make the job easier and ensure safe operation.

2. Scope of delivery

2.1 MD

Grundfos Multilift MD 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 LC 221 controller. The controller includes a power supply cable with plug.

An accessories bag containing the following items is also included:

• 1 x installation and operating instructions

• 1 x Quick guide for controller menu

• 1 x discharge adapter flange, DN 80, with connection piece, DN 100 (outer diameter, 110 mm)

• 1 x flexible hose, DN 100, and two clamps to connect the discharge pipe

• 1 x flexible hose, DN 70, and two clamps to connect the venting pipe

• 2 x screw and expansion anchor for tank fixation

• 3 x screw and washer for fastening a pipe plug in the inlet disk, if required

• 1 x socket seal, DN 100

• 1 x socket seal, DN 50, for diaphragm pump connection or inlet, DN 50

• 1 x gasket kit, DN 80, 4 bolts M16, nuts and washers (galvanised).

2.2 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 LC 221 controller. The controller includes a power supply cable with plug.

An accessories bag containing the following items is also included:

• 1 x installation and operating instructions

• 1 x Quick guide for controller menu

• 1 x discharge adapter flange, DN 80, with connection piece, DN 100 (outer diameter, 110 mm)

• 1 x flexible hose, DN 100, and two clamps to connect discharge pipe

• 1 x flexible hose, DN 70, and two clamps to connect venting pipe

• 4 x screw and expansion anchor for tank fixation

• 1 x socket seal, DN 150

• 1 x flexible hose connection with two clamps, DN 50, for diaphragm pump connection or inlet, DN 50

• 1 x gasket kit, DN 80, 4 bolts M16, nuts and washers (galvanized).

3. General description

Grundfos Multilift MD and MLD lifting stations are supplied complete with collecting tank, pumps, level sensor, LC 221 controller and connection accessories.

The following gives a description of the components.

English (GB)

Fig. 1 Multilift MD front and rear view

Pos. Description

1Pump 2 Lifting eye for pumps 3Nameplate 4 Venting 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

Non-return butterfly valve, DN 80, with inspection cover

and drain screw to lift up the valve flap Discharge adapter flange, DN 80, to pipe ∅110 w i th

flexible connection piece and 2 clamps Side or top inlet, DN 50 (seals are accessory).

Socket for MD; connecting piece for MLD Collecting tank with carrying handle moulded into tank

body Port for manually operated diaphragm pump, 1 1/2".

Socket with seal for MD; connecting piece with flexible connection hose and clamps for MLD

13 Horizontal inlet, DN 100 (seal is accessory)

Adjustable inlet disk, DN 100

(DN 150 optional as accessory)

15 Separate inspection cover

TM05 1521 2911

Fig. 2 Multilift MLD front and rear view

TM05 1522 2911

3.1 Applications

Note

Typ

Prod.-Nr.

P. c.

fHz

Serial no.

Phases

Gkg

98127055

0197

1/1

Qmax

Hmin

Hmax

Med max

Amb max

m /h

Made in Germany

96075419

DK - 8850 Bjerringbro, Denmark

English (GB)

Grundfos Multilift MD and MLD lifting stations are designed for the collection and pumping of domestic wastewater with no free flow to sewer level. Grundfos Multilift MD and MLD 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 multi-family houses, offices, schools, hotels, restaurants, public areas and other commercial buildings and similar industrial applications.

Do not pump rainwater with the Multilift MD and MLD 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 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. For drainage of greasy wastewater, use a grease separator according to EN 1825-2 between a canteen or commercial kitchen and the Multilift MD or MLD.

5.1 Lifting station

The Grundfos Multilift MD and MLD lifting stations are supplied complete with two single- or three-phase submersible pumps connected to the LC 221 controller incorporating a level sensor.

Type key, lifting station

Example M L D .22 .3 .4

Multilift lifting station L = large tank D = 2 pumps Output power, P

1 = single-phase motor 3 = three-phase motor

2 = 2-pole motor 4 = 4-pole motor

Nameplate, lifting station

/ 100 (W)

4. Transportation and storage

Warning

Fig. 3 Nameplate, lifting station

TM04 7639 2210

The motor 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.

For long periods of storage, the LC 221 controller must be protected against moisture and heat.

After a long period of storage, the pumps must be inspected before they are started up again. Make sure that the impellers can rotate freely.

5. Product description

The MD and MLD Multilift lifting stations are described in the following sections:

• section 5.1 Lifting station describing the lifting station with collecting tank, pumps, non-return valve and level sensor

• section 5.2 LC 221 controller describing the controller as well as the functions and operation of the controller.

In section 7. Installation of lifting station and the following sections, the above components are described as one unit.

Pos. Description

1 Type designation 2 Product number 3 Production code (year/week) 4 Frequency [Hz] 5 Number of phases + voltage [V] 6 Voltage [V] 7 Full-load current [A] 8 Motor input power P

[kW]

9 EAC and CE mark 10 Duty type 11 Serial number

12 Maximum flow rate [m

/h] 13 Minimum head [m] 14 Maximum head [m] 15 Maximum liquid temperature [°C] 16 Maximum ambient temperature [°C]

17 Weight [kg] 18 European norm identification code 19 Notified Body 20 Reference number for the Declaration of Performance

5.1.1 Collecting tank

Note

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, discharge pipe, venting pipe and a manually operated diaphragm pump, which is available as an accessory.

The MD 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. See section 7.3 Procedure for

installation of lifting station.

Furthermore, the MD collecting tank offers four horizontal inlets in the sides (2 x DN 100 and 2 x DN 50) and three vertical inlets at the top of the tank (2 x DN 150 and 1 x DN 50). The centres of the horizontal inlets are 120 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.

The MLD 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.

The tank volume and effective volume (volume between start and stop) for Multilift MD and MLD lifting stations appear from the following table:

Inlet level [mm] 180 250 315

Total tank volume [l] 130

Effective tank volume [l] 49 69 86

MLD

Inlet level [mm] 560

Total tank volume [l] 270

Effective tank volume [l] 190

Setting to the relevant start inlet level must be made during the start-up phase via the setup menu. See section 6.2 Setup menu.

The first step after power supply connection is a start-up phase with level setting.

To minimise sedimentation, the tank bottom is chamfered to lead the wastewater to the pump.

5.1.2 Pumps

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. The pump has a mechanical shaft seal.

See more technical data in section 12. Technical data. Single-phase motors are protected by a thermal switch in the

windings and run via a capacitor inside the controller cabinet. Three-phase motors are protected by a thermal switch in the

windings and an additional thermal circuit breaker in the cabinet of Multilift MD/MLD22, 24, 32 and 38 to cut out the motor in case of overload.

If the phase sequence for three-phase pumps is wrong, the controller will indicate fault and prevent the pump(s) from starting. For correction of phase sequence, see fig. 14. For direction of rotation, see section 10.2 Motor.

If the motor is overloaded, it will stop automatically. When it has cooled to normal temperature, it will

restart automatically.

Performance curves are available in the databooklet, which you can download via the QR code or link below:

http://net.grundfos.com/qr/i/98288126

5.1.3 Shaft seal

The pumps have three shaft seals, the oil chambers in between are filled for life and therefore require no maintenance. For replacement in case of service, please see service instructions.

5.1.4 Motor cable

The motor cable is fitted to the motor via a cable entry. The enclosure class is IP68. The length of the cable is either 4 m or 10 m.

Nameplate, motor

6 7

Prod.-Nr.

Phases

DK - 8850 Bjerringbro, Denmark

98189706 - A

P. c .

1217 001

Serial no.

400

1/1

I P1 P2

5.3

2.8

2.2

V A

S3-40%-1min

0.77

1405

IP68

Made in Germany

min

-1

98189706

Fig. 4 Nameplate, motor

Pos. Description

1 Product number and model 2 Production code (year/week) 3 Frequency 4 Number of phases 5 Rated voltage 6 Rated current 7 Input power 8 Shaft power

9 Serial number 10 Operating mode 11 Powe r factor 12 Rated speed 13 Insulation class 14 Weight 15 Production country

English (GB)

TM03 3618 0506

5.1.5 Non-return valve

Note

English (GB)

The DN 80 non-return valve includes a drain screw to lift up the internal flap in order to drain the discharge pipe in case of maintenance or service. The valve is designed and tested according to EN12050-4. See fig. 5.

Loosen the lock nut a little before turning the drain screw.

Fig. 5 Butterfly (double) non-return valve, DN 80

5.2 LC 221 controller

The LC 221 is a level controller specially designed for controlling and monitoring the Grundfos lifting stations, Multilift MD and MLD. The basis for the control is the signal received continuously from the piezoresistive, analogue level sensor.

The level controller switches the MD and MLD Multilift pumps on and off according to the liquid level measured by the level sensor. When the first start level is reached, the first pump will start, and when the liquid level has been lowered to the stop level, the pump will be stopped by the controller. If the liquid level rises up to the second start level, the second pump will also start, and when the liquid level has been lowered to the stop level, the pumps will be stopped by the controller.

Starts alternate between the two pumps. In case of pump failure in one pump, the other pump will take

over (automatic pump changeover). An alarm will be indicated in case of high water-level in the tank,

pump failure, etc. Furthermore, the level controller has many more functions as

described below.

TM051530 2911

5.1.6 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 analogue signal. The control box uses the analogue signal to start and stop the pump and to indicate high water-level alarm. The pressure tube is fixed underneath the screw cap and can be taken out for maintenance, service and for cleaning the inside of the tube. An O-ring ensures tightness.

The hose is supplied in lengths of 4 or 10 m. The hose must be connected to the controller.

Fig. 6 Screw cap with hose, DN 100 tube

Fig. 7 LC 221 level controller for Multilift MD and MLD

The LC 221 controller has the following functions:

• on/off control of two wastewater pumps based on a continuous signal from a piezoresistive level sensor with alternating operation and automatic changeover in case of pump failure

• motor protection with motor-protective circuit breaker and/or current measurement as well as connection of thermal switches

• motor protection via operating-time limitation with subsequent emergency operation. Normal operating times are max. 25 seconds (MD) and 55 seconds (MLD), and the operating

TM05 0332 1011

time is limited to three minutes (see section 6.4 Description of

fault indications, fault code F011).

• automatic test runs (2 seconds) during long periods of inactivity (24 hours after last operation)

• re-starting delay up to 45 seconds after returning from power cut-off to mains operation (in order to even out the mains load when several appliances are started up at the same time)

TM05 1859 3811

• setting of delay times:

Type

Prod.-No.

P.c.

Phases U

Serial no.

max

TAmb max

IPump max

98189707

LC 221.1.230.1.10.30/150 MPU

98189707

1221

250

V01

0012

220-240

3 2

5.2 40

Ucontact max

IFuse max

TAmb min

Icontact max

c < 10 kA

IP55

Made in Germany

• automatic current measurement for alarm indications

• setting of current values:

• operating indication of:

• alarm indication of:

• selection of automatic alarm resetting

• fault log of up to 20 alarms

• selection between different start levels

• selection of maintenance interval (0, 3, 6 or 12 months). As standard, the LC 221 has four potential-free outputs for:

Furthermore, LC 221 has six digital inputs for the following functions:

For updates and further adjustments, a PC Tool can be connected. See service instructions.

To allow for the situation that the normal power supply should fail, a battery (accessory) can be installed which activates an acoustic alarm (buzzer). The buzzer is activated as long as the fault exists. It cannot be reset.

In case of sectional power failure, the common alarm output which is a potential-free changeover contact can be used to forward the alarm signal to a control room by means of an external power source.

– stopping delay (time from the stop level is reached till the

pump is stopped) - reduces water hammer if pipes are long

– starting delay (time from the start level is reached till the

pump is started)

– alarm delay (time from a fault appears till an alarm is

indicated). This prevents short-time high-level alarm in case of temporary high inflow to the tank.

– overcurrent (preset) – rated current (preset) – dry running current (preset).

– operating mode (auto, manual) – operating hours – impulses (number of starts) – highest measured motor current.

– pump status (running, fault) – phase sequence failure and missing phase – thermal-switch failure – high-water alarm (5 seconds delay) – time for service/maintenance (selectable).

– pump running – pump failure – high water-level alarm – common fault.

– connecting an analogue sensor (4-20 mA or 0-5 V) – connecting up to four level switches and pressure sensors

instead of analogue sensor. An additional float switch can be connected to the alarm input as backup for the analogue sensor.

– connecting a separate level switch to be used for flood

detection outside Multilift MD or MLD. Lifting stations are often installed in a sump inside the basement - the lowest point in the building. In case of e.g. groundwater inflow or water pipe burst, an alarm will be indicated by the controller.

– connecting a piezoresistive pressure sensor PCB

(pre-assembled) – connecting an external alarm reset – connecting the thermal switch of the motor.

Type key, LC 221 controller

Example LC 221 .2 .230 .1 .10 .30

LC 221 = controller type 1 = one-pump controller

2 = two-pump controller Voltage [V] 1 = single-phase

3 = three-phase Max. operating current [A] Capacitors [μF] Starting method:

[ ] = DOL SD = Star-delta

Nameplate, LC 221 controller

The controller type, voltage variant, etc. are stated in the type designation on the nameplate situated on the side of the controller cabinet.

Fig. 8 Example of an LC 221 nameplate

Pos. Description

1 Type designation 2 Product number 3 Production code (year, week) 4 Number of phases 5 Maximum pump input current 6 Maximum voltage at potential-free contact 7 Maximum backup fuse 8 Minimum ambient temperature

9Version 10 Serial number 11 Rated voltage 12 Power consumption 13 Maximum current at potential-free contact 14 Weight 15 Maximum ambient temperature 16 Frequency

English (GB)

TM054782 3311

5.2.1 Design

English (GB)

The LC 221 level controller incorporates the necessary components to control and protect the pumps, such as relays and capacitors for single-phase motors, contactors for three-phase motors and additional motor-protective circuit breaker (> Multilift MD22 or MLD22).

The control panel offers a user interface with operating buttons and a display for indication of operating conditions and fault indications.

Furthermore, it has an integrated piezoresistive pressure sensor which is activated by compressed air directly via the pressure tube inside the collecting tank. Finally, it has terminals for power supply, connection to the pump and the inputs and outputs mentioned in section 5.2 LC 221 controller.

The front cover is closed by four bayonet fastenings with quarter turn locks. On the left side, the locks are extended and connected to the cabinet bottom with hinge strings. The cabinet offers the possibility of being mounted on a wall without opening it first. A drilling template and six screws with rubber guides are enclosed.

5.2.2 Control panel

Display (pos. 1)

The display shows all relevant operating data and fault indications. The operation and fault indications are described in section

6.1 Description of display.

Operating buttons (pos. 2)

The level controller is operated by the operating buttons placed under the display. The functions of the operating buttons are described in the table below:

Operating

button

Status LEDs (pos. 3)

The upper LED (green) is on when the power supply is on. The lower LED flashes (red) in case of fault to make the fault visible from a long distance and is thus an addition to the display symbols and fault codes.

Selector switch (pos. 4)

Description

• go left in the main menu.

• go up in the submenus.

• decrease values in the submenus.

• confirm a selection.

• activate the submenus.

• reset the buzzer.

• go right in the main menu.

• go down in the submenus.

• increase values in the submenus.

Fig. 9 Control panel

Pos. Description

1 Display 2 Operating buttons 3Status LEDs 4 ON-OFF-AUTO selector switch

Switch Description of function

The operating mode is selected by the ON-OFF-AUTO selector switch which has three different positions: POS I: Starts the pump manually. The operating time protection is active and indicates alarm after three minutes. Normal operating times are up to max. 25 seconds (MD) and 55 seconds (MLD).

TM05 1860 3811

POS O:

• Stops the pump when running and cuts off the power supply to the pump. The three symbols "Settings locked", "Information" and "Setup" will be visible.

• Resets fault indications.

POS AUTO: Automatic operation. The pump will start and stop according to the signal from the level sensor.

5.2.3 Internal layout of LC 221

Note: Cable connections for pos. 8-15:

Use a cable tie if leads protrude more than 20 mm from the cable sheath.

Figure 10 shows the internal layout of LC 221.

English (GB)

20 7

>20

Fig. 10 Internal layout LC 221 (three-phase PCB as example)

Pos. Description Comments Terminal designation

1 Terminals for power supply PE, N, L3, L2, L1 2 Terminals for connecting pump 1 PE, N, W1, V1, U1 3 Terminals for connecting pump 2 PE, N, W2, V2, U2 4 Terminals for thermal switch, pump 1 T1, T2 5 Terminals for thermal switch, pump 2 T1, T2 6 Terminals for external reset 230 V 11, 12 7 Terminals for external alarm (outside the tank) 230 V 13, 14 8 Terminals for common fault

9 Terminals for high water-level alarm X10 10 Terminals for failure, pump 2 X9 11 Terminals for failure, pump 1 X8 12 Terminals for operation, pump 2 X7

Potential-free changeover NO/NC

contacts with max. 250 V / 2 A.

Attention: Connect these terminals

to supply network potential or low

voltage but do not mix the two.

X11

13 Terminals for operation, pump 1 X6

Terminals for level switches Digital 81-88

Terminals for additional high water-level alarm (inside the tank)

Digital 81, 82

15 Terminals for analogue sensor 0-5 V or 4-20 mA 91 (GND), 92 (Signal), 93 (12 V) 16 Service connector to PC Tool 17 Connector for GENIbus interface module Not in use for this application -

18 Control circuit fuse

Fine-wire fuse:

100 mAT / 20 mm x ∅5

19 Piezoresistive pressure sensor module 0-5 V 20 DIP switches Not in use for this application -

Non-rechargeable batteries only.

21 Connector for battery, 9 V

The controller is not equipped with a

charging device.

TM05 3597 1612 - TM05 3719 1712

6. Operating LC 221 controller

English (GB)

6.1 Description of display

The display of the LC 221 level controller is shown in fig. 11.

TM05 1861 3811

Fig. 11 LC 221 display

The table below describes the symbols shown in the display as well as the corresponding functions and indications.

Symbol Function Description

Settings locked

Automatic operating mode

Information

Setup

Alarm

Impulse counter The symbol is visible when the number of starts in the information menu is shown in the display.

The symbol is visible when the setup menu is locked. This prevents unauthorised persons from making changes to the settings. To unlock the buttons, enter the code 1234.

The symbol is visible when the level controller is in automatic mode, i.e. when the selector switch is in position AUTO.

The symbol is visible when there is information about faults, operating hours, number of starts, max. current of pump. The symbol will be visible if the level controller detects a fault and the fault will be written into the fault log. After you have entered the fault log, the symbol will switch off. See section 6.3 Information menu.

The setup menu holds information about setup for start level, rated current, the stop-, start- and alarm delay, selection of maintenance interval, reset (automatic or manual) and reset back to factory settings. For the procedure and a description of the settings, see section 6.2 Setup menu.

The symbol is visible if an alarm situation occurs. The type of alarm will appear from the information menu. The symbol disappears when the fault has disappeared.

Settable times and fault indication

The symbol is visible when the operating hours in the information menu and the delays set in the setup menu are shown in the display. The symbol flashes when max. operating time has been exceeded.

Symbol Function Description

In automatic mode, faults are indicated by means of a code, and in normal operation these two values are shown:

• the liquid level in the tank, if the pump is not running

• the current consumption, if the pump is running. If both pumps are running, the current consumption shown is the value for both pumps.

In the information menu, the following information is indicated:

• fault codes

Values in the form of digits

• operating hours

•impulses

• max. measured motor current.

In the setup menu, the following information is indicated:

•set start level

• set delays

•set currents

• sensor calibration (presettings for piezoresistive level sensor)

• service intervals

• total reset to factory settings.

English (GB)

Pump operation and pump fault in pump 1

Pump operation and pump fault in pump 2

Phase-sequence fault

Thermal-switch failure

High-water alarm The symbol is visible if the liquid level in the tank reaches max. level.

Liquid level The symbol is visible when the current liquid level is indicated in the middle of the display.

The symbol is visible when pump 1 is running and flashes when pump 1 has a fault. In case of fault, it can be combined with other symbols or fault codes in the display.

The symbol is visible when pump 2 is running and flashes when pump 2 has a fault. In case of fault, it can be combined with other symbols or fault codes in the display.

(Only three-phase pumps) The symbol flashes in case of a phase-sequence fault and missing phase. See section 6.4 Description of fault indications.

The symbol is visible if the motor temperature exceeds the permissible value and the thermal switch cuts out the pump.

6.2 Setup menu

L_01 Start level [mm]

Setup menu

3.8

I_02 Rated current [A]

T_01 Stop delay [sec.]

T_02 Start delay [sec.]

T_03 Alarm delay [sec.]

Manual/

Automatic

0, 3, 6, 12

EXIT

EXIT Back to main menu

G_01 Reset to factory settings

A_01 Reset alarm

M_01 Maintenance interval [month]

180 250 315

English (GB)

All settings are preset except for the start level. The start level depends on the inlet height and must be set during the start-up phase. See section 8.4 Setting of LC 221. However, in case adjustments are required, settings can be made via the setup menu. To open the setup menu, mark the symbol using the button and press the button . Navigate through the menu by means of the buttons and . Select the desired menu item by pressing the button . Enter values or select settings from a list by means of the buttons and . Save the settings by pressing the button . See also fig. 12.

The following settings can be made:

•start level

• rated current

• stop delay

•start delay

• alarm delay

• time for maintenance

• alarm reset (manually or automatically)

• reset to factory settings.

Fig. 12 Menu structure for setup menu

TM06 6676 2016

6.3 Information menu

EXIT

EXIT Back to main menu

R_03 Measured max. motor current [A]

3.9

007200

000020

20 faults from 01 to 20 20 F006 … 01 F002

R_02 Impulse counter

R_01 Hour counter

F_01 Fault LOG

Information menu

All status data and fault indications can be seen in the information menu. The information menu can be seen in all operating modes (ON-OFF-AUTO). To open the information menu, mark the symbol using the button and press the button . Navigate through the menu by means of the buttons and . Select the desired menu item by pressing the button . See also fig. 13.

In the information menu the following data can be read:

• fault indications

• operating hours

• number of starts

• max. measured motor current.

English (GB)

Fig. 13 Menu structure for information menu

TM05 1809 3811

6.4 Description of fault indications

English (GB)

If a fault occurs, the symbol will be visible, an audible alarm will be given by the buzzer and the fault code will be written by means of the 14-segment characters in the display. To see the kind of fault, if it is automatically reset and the code is not longer visible, open the fault log (see fig. 13). When you leave the fault log, the symbol will disappear.

The last 20 faults are stored in the fault log as fault codes. The meaning of the fault codes are described in the table below:

Reset of

Fault

code

F001

Meaning

Phase sequence failure

Displayed

text

F001 ●

Flashing symbols

fault

indications

Auto Man

Description

(Only three-phase pumps) The phase sequence between control board and power supply is wrong. See fig. 14.

F002

F003 High liquid level F003 ●●The liquid level is high in relation to preset value.

F004 Sensor failure SENSOR - ●●Sensor signal out of range or lost.

F005

F006

F007

F008

F011

F012

F013 External fault EXT - ●

F014 Battery failure BAT - ●●The battery is empty and must be replaced.

F015

F016

F017

F018

F019

F117 F117 ●

F020

One phase missing

Overtemperature, pump 1

Overtemperature, pump 2

Overcurrent, pump 1

Overcurrent, pump 2

Operating time exceeded, pump 1F011 ●●

Operating time exceeded, pump 2F012 ●●

Relay or contactor does not open, pump 1

Relay or contactor does not close, pump 1

Relay or contactor does not open, pump 2

Relay or contactor does not close, pump 2

Display communication failure

High level alarm in tank

F002 ●●

TEMP ●●

F007 ●

F008 ●

RELAY ●

RELAY

RELAY ●

RELAY

Display is

off.

F020 ●

(Only three-phase pumps) One phase is missing.

Motor thermal switches connected to the controller will stop pump 1 in case of overheating.

Motor thermal switches connected to the controller will stop pump 2 in case of overheating.

Pump 1 is stopped if an overcurrent is measured for a certain period of time (blockage protection).

Pump 2 is stopped if an overcurrent is measured for a certain period of time (blockage protection).

The pump has run for more than the allowed operating time and the controller has stopped the pump for a defined cool-down period in order to prevent overheating. The operating time and cool down period depends on the pump. See duty type on nameplate. Check that the outlet isolating valve is open. Check that the non-return valve is functioning. A leaky non-return valve can allow liquid in the outlet pipe to flow back in to the collecting tank. Remove any blockage from the venting system, see fig. 33.

An external level switch can be connected to the controller to give an alarm when basement outside the lifting station is flooded by groundwater or water from burst water pipe.

Pump 1 receives a signal to stop, but does not react. This situation is detected by current measurement.

Pump 1 receives a signal to start, but does not react. This situation is detected by current measurement.

Pump 2 receives a signal to stop, but does not react. This situation is detected by current measurement.

Pump 2 receives a signal to start, but does not react. This situation is detected by current measurement.

Communication failure between the main board and the display. As the display is off, the fault code can be found via PC tool only.

●

Check the patch cable RJ45 between the main board and the display.

Communication failure between the main board and the display. The display is still on and is displaying the fault code F117. Check the patch cable RJ45 between the main board and the display.

Alarm triggered by the additional float switch inside the tank. The piezoresistive sensor has failed to detect the start level. The float switch is triggered and starts a pump for 20 seconds (preset value, changeable via PC tool). Check the tank, the level sensor hose and the hose connections for any air leakage. The level sensor hose is connected correctly to the pneumatic coupling underneath the controller when you cannot pull it out without pressing the locking mechanism.

If a fault occurs, the red LED will flash, the symbol will be visible and the fault will be added to the fault log. Furthermore,Hthe buzzer will be activated, the symbol will be visible, the corresponding symbols will flash and the fault code will be displayed. When the fault has disappeared or has been removed, the controller will automatically switch to normal operation again. However, the controller enables resetting of the fault indication (visible and acoustic alarms) either manually (Man) or automatically (Auto).

If manual resetting was selected in setup menu, the acoustic alarm and red LED can be reset by pressing the button . The fault indication will be reset when the fault has disappeared, has been removed or the ON-OFF-AUTO switch has been set to OFF position.

You can get an overview of faults in the fault log in information menu.

The symbol will be visible as long as the fault log is open. If automatic resetting was selected in menu setup, the red LED

and the symbol will disappear, and the buzzer will be deactivated again after the fault has disappeared, has been removed or the ON-OFF-AUTO switch has been set to OFF position. However, even if automatic resetting was selected, some of the fault indications have to be reset manually. See the table above.

Every 30 minutes the fault indication will be written from the short-term memory into the long-term memory.

English (GB)

Fig. 14 Changing phases of a three-phase controller with

phase inverter

TM05 3455 0616

7. Installation of lifting station

472165

English (GB)

7.1 General description

When installing the Multilift MD or MLD lifting station, make sure that all local regulations covering venting, access to the stations, etc. are observed.

7.1.1 Installation sketches

Fig. 15 Installation sketch, Multilift MD

Fig. 16 Installation sketch, Multilift MLD

TM05 1864 3811

TM05 1865 3811

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 96002011 6 Gasket kit, DN 80, with bolts, nuts and washers 96001999 7 Inlet disk with socket seal, DN 150, for replacement 98079681

7.2 Guidelines for installation of lifting station

Note

Caution

Note

The guidelines for correct mechanical installation of lifting station are according to EN 12056-4.

See section 7.1.1 Installation sketches.

• 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, it is advisable (in certain countries required) to install a drainage pump in a separate pump sump below floor level in order to drain the room. See figures 15 and 16.

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 discharge 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. See figures 15 and 16.

• For discharge pipes, DN 80 and upwards, install an isolating valve in the discharge 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 discharge 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 venting 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 discharge 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).

7.3 Procedure for installation of lifting station

7.3.1 Inlet pipe connections, Multilift MD

1. Check the scope of delivery. For scope of delivery see section 2. Scope of delivery.

2. Prepare the adjustable inlet on the back of Multilift MD. The turnable inlet disk has a DN 100 inlet and allows the inlet height to be adjusted to any height between 180 and 315 mm above floor level. The most common heights, 180, 250 and 315 mm, are marked beside the inlet. See fig. 17. An inlet disk with a DN 150 inlet is available as an accessory. See fig. 18. The screws around the outer ring of the inlet disk are not fully tightened allowing the inlet disk to be turned. This will allow the inlet to be adjusted to the desired inlet height. When the desired inlet height has been set, tighten all screws. All screws must be tightened to max. 9 Nm.

Before connecting Multilift MD, consider that when turning the inlet disk to fit to the height of the inlet pipe, the lifting station and the discharge will move sideways accordingly (max. 72.5 mm). See fig. 17.

Fig. 17 DN 100 inlet disk, adjustable from 180 to 315 mm

above the floor to the middle of the inlet pipe

English (GB)

TM05 0351 1011

TM051669 3411

Fig. 18 Optional DN 150 inlet disk, adjustable from 207 to

279 mm above the floor to the middle of the inlet pipe

English (GB)

Caution

Note

Caution

DN 50 - ∅43 DN 100 - ∅100 DN 150 - ∅150

Fig. 19 Untightened screw in outer ring

Multilift MD lifting stations are supplied with loose screws in the outer ring of the turnable inlet disk. See fig. 19. Check and tighten all screws to max. tightening torque of 9 Nm before connecting the inlet pipe.

If the main inlet is not to be used it can easily be plugged using a standard DN 100 pipe plug fastened with three screws and washers. See fig. 20.

4. Prepare the connection for diaphragm pump (optional). Use cup drill, ∅43, for DN 50 connection socket. To avoid sharp cutting edges, the hole must be deburred.

TM05 0336 1011

TM05 1242 2511

Fig. 21 Cutting or drilling of optional connection holes

5. Connect the inlet pipe to the tank. Install an isolating valve between inlet pipe and lifting station to avoid inflow during maintenance and service. We recommend an easy-to-handle PVC isolating valve.

Fig. 20 Plugging the main inlet

3. Prepare optional inlets by cutting out the desired one. Use cup drills ∅150 for DN 150, ∅100 for DN 100 and ∅43 for DN 50 inlets. The cutting line is recessed. To avoid sharp cutting edges, the holes must be deburred. The socket seals are provided with collars.

TM05 0329 1011 - TM05 0352 1011

TM05 1503 2811

Fig. 22 Installation of isolating valve

Make sure that weight from inlet, discharge and vent pipes does not rest on the tank. Long pipe sections, valves, etc. must be supported.

Warning Never step on the lifting station.

7.3.2 Inlet pipe connections, Multilift MLD

Note

1. Check the scope of delivery. For scope of delivery, see section 2. Scope of delivery.

2. Prepare the ∅150 inlet. Use a cup drill ∅150 to drill out the hole along the recessed line. See fig. 21. The tank minimum inlet level for MLD is approximately 560 mm. See fig. 23.

3. Prepare the additional ∅50 inlet. Cut along the stepped line of the ∅50 inlet port on top of the tank.

Fig. 23 Minimum inlet level for MLD

7.3.3 Further connections for Multilift MD and MLD

1. Connect the discharge pipe. Install an isolating valve between the non-return valve and the supplied flexible connection hose, DN 100 (internal diameter 110 mm). A flexible connection can be ensured if a distance of approx. 3 cm is left between the pipe ends of the connection piece and the discharge pipes.

4. Fix the tank to the floor.

Fig. 25 Fixing point for fixation of tank to the floor

8. Installation of LC 221 controller

Warning Before making any connections in LC 221 or working

on pump, pit, etc., make sure that the power supply has been switched off and that it cannot be accidentally switched on.

The installation must be carried out by authorised personnel in accordance with local regulations.

8.1 Location

TM03 3613 0406TM05 1866 3811

Warning Do not install the LC 221 controller in explosion

hazard areas.

LC 221 can be installed at ambient temperatures ranging from 0 °C to +40 °C.

Enclosure class: IP55. Install the controller as close as possible to the lifting station. When installed outdoors, LC 221 must be placed in a protective

shed or enclosure. LC 221 must not be exposed to direct sunlight.

English (GB)

TM05 0334 1011

Fig. 24 Isolating valve on top of non-return valve

2. Connect the venting pipe. The DN 70 venting port on top of the tank is open. Connect the venting pipe to the venting port via a flexible connection piece. The venting pipe must be led out above the roof into the open air in accordance with local regulations. Check the use of venting valves (accessory) according to local regulations if venting above the roof is impossible. A flexible connection can be ensured if a distance of approx. 3 cm is left between the venting pipe end and the venting port.

3. Connect the diaphragm pump (optional). Fit the diaphragm pump on the discharge side. To facilitate servicing of the diaphragm pump, we recommend fitting a 1 1/2" isolating valve to the tank port.

8.2 Mechanical installation

Warning When drilling the holes, take care not to damage any

cables or water and gas pipes. Ensure a safe installation.

LC 221 can be mounted without removing the front cover.

Proceed as follows:

• Mount LC 221 on a plane wall surface.

• Mount LC 221 with the cable entries pointing downwards (additional cable entries, if required, must be fitted in the bottom plate of the cabinet).

• Mount LC 221 with four screws through the mounting holes in the back plate of the cabinet. Drill the mounting holes with a 6 mm drill using the drilling template supplied with the controller. Fit the screws into the mounting holes and tighten securely. Fit the plastic caps.

English (GB)

Fig. 26 Mounting of controller to the wall

8.3 Electrical connection

Warning The protective earth (PE) of the power outlet must be

connected to the protective earth of the product. The plug must have the same PE connection system as the power outlet.

Warning The installation must be fitted with a residual current

device (RCD) with a tripping current less than 30 mA.

Warning The product must be connected to an external main

switch with a minimum contact gap of 3 mm (0.12 inch) in all poles.

Warning LC 221 must be connected in accordance with the

rules and standards in force for the application in question.

Warning Before opening the cabinet, switch off the power

supply.

The operating voltage and frequency are marked on the controller nameplate. Make sure that the controller is suitable for the power supply on which it will be used.

All cables/wires must be fitted through the cable entries and gaskets.

The power outlet must be placed near the cabinet as the controller is supplied with a 1.5 m cable.

Maximum back-up fuse is stated on the controller nameplate.

8.4 Setting of LC 221

Only the start level corresponding to the inlet level to the collecting tank needs to be set. All other values are preset but can be adjusted if required.

Select the height of the inlet pipe, 180, 250 or 315 mm above floor level, using the buttons and , and press the button to save the desired value. If the height of the inlet pipe is between two values, e.g. 220 mm above the floor, choose the nearest lower value (180 mm). Now the controller is ready for automatic mode.

The following values can be changed, if necessary:

Start level

The start level must be set according to the inlet pipe height above floor level (180, 250 and 315 mm). Stop and alarm levels are preset.

Rated current

Preset value from factory according to the rated current of the motor. The protection against pump blockage is a preset value for overcurrent.

Stop delay

The stop delay increases the effective volume and reduces the quantity of residual water in the tank. It also prevents water hammer. The non-return valve closes more softly. The preset value is 0.

Start delay

TM05 1940 4011

Normally there is no need to make adjustments for lifting stations except on a houseboat or pontoon boat. The preset value is 0.

Alarm delay

High temporary inflow can cause short-time high-level alarm. This situation may arise when a backwash filter of a swimming pool is connected to Multilift MD. Preset value is 5 seconds.

Maintenance interval

The maintenance/service interval can be set to 0, 3, 6 or 12 months and is indicated in the "SERVICE" display (no acoustic signal).

Reset alarm

It is possible to set the controller to reset some alarms automatically when the fault disappears; however, most alarms must be reset manually. See section 6.4 Description of fault

indications. Preset value is AUTO.

Reset to factory settings

The controller will reboot, and start-up settings will have to be made again. See section 6.2 Setup menu.

8.4.1 External alarm

Lifting stations are often installed in sumps below the basement of buildings. That is the deepest point in the building, and an additional alarm level switch can be placed outside the lifting station to detect flooding caused by leakages, pipe bursts or groundwater inflow.

The external alarm can be connected to a level switch (230 V / 2 A) at terminals 13, 14.

8.5 Wiring diagrams

Fig. 27 Wiring diagram, single-phase Multilift MD/MLD.12.1.4

and MD/MLD.15.1.4

English (GB)

TM05 3595 1612TM05 3596 1612

Fig. 29 Wiring diagram, three-phase Multilift MD/MLD.22.3.4

with contactors

TM05 3593 1612TM05 3594 1612

Fig. 28 Wiring diagram, three-phase Multilift MD/MLD.12.3.4

and MD/MLD.15.3.4

Fig. 30 Wiring diagram, three-phase Multilift MD/MLD.24.3.2,

MD/MLD.32.3.2 and MD/MLD.38.3.2 with motor-protective circuit breaker

9. Startup

Note

English (GB)

Warning Before starting any work on a pump used for

pumping liquids which could be hazardous to health, clean and vent the pump, pit, etc., thoroughly according to local regulations.

Warning Before making any connections in LC 221 or working

on pump, pit, etc., make sure that the power supply has been switched off and that it cannot be accidentally switched on.

Prior to start-up, the connection and settings must have been carried out according to sections 8.3 Electrical connection and

8.4 Setting of LC 221.

Start-up must be carried out by authorised personnel. Proceed as follows:

1. Check all connections.

2. Connect the plug to the power supply and follow the controller start-up sequence. Note: It will take up to 45 seconds to boot the controller. This time can be reduced to 5 seconds by pressing the OK button. When the power supply is connected for the first time, three values for the start level can be chosen (180, 250 or 315 mm above floor level) according to the inlet height to the collecting tank. If the inlet height is between two levels, choose the lower level for start in the display. All other settings are preset. Some settings can be changed. See section 8.4 Setting of LC 221. Now the controller is ready for automatic mode (selector switch in pos. AUTO).

3. Open the isolating valves in discharge and inlet lines.

4. Activate a sanitary appliance connected to the inflow of the Multilift MD or MLD and monitor the increasing liquid level in the tank up to the start level. Check the starts and stops at least twice.

If the pump cable was disconnected from the controller, for instance to lead the cable through an empty cable conduit, check the direction of rotation of the pump. See section 10.2 Motor.

10. Maintenance and service

The Multilift MD and MLD require a minimum of maintenance.

Warning Before carrying out maintenance and service on

lifting stations used for pumping liquids which might be hazardous to health, make sure that the lifting station has been thoroughly flushed with clean water and that the discharge pipe has been drained. Rinse the parts in water after dismantling. Make sure that the isolating valves have been closed. The work must be carried out in accordance with local regulations.

Warning Before making any connections in LC 221 or working

on lifting stations, make sure that the power supply has been switched off and that it cannot be accidentally switched on.

According to EN 12056-4 lifting stations must be checked at the following regular intervals:

• every 12 months in single-family houses

• every 6 months in multi-family dwellings

• every 3 months in commercial and industrial applications. During the check, local regulations must be observed. The periodic checks of the lifting station must be carried out by

authorised personnel and must comprise electrical and mechanical maintenance.

Check the following points:

• Discharge and inlet connections Check all connections to the lifting station for tightness and leakages. Make sure that weight from the inlet, discharge and venting pipes does not rest on the tank. Long pipe sections, valves, etc. must be supported.

• Power consumption See nameplate.

• Cable entry Make sure that the cable entry is watertight and that the cables are not bent sharply and/or pinched.

• Pump parts Remove eight screws and dismantle the pump from the tank and check that the vent hole of the pump housing is clear. When the pumps is mounted again, we recommend to replace the O-ring between pump and tank. Make a test run with clean water. In case of noise, vibration or abnormal running, contact Grundfos.

• Ball bearings Check the shaft for noisy or heavy operation. Replace defective ball bearings. A general overhaul of the pump is usually required in case of defective ball bearings or poor motor function. This work must be carried out by the manufacturer or an authorised service workshop.

Cleaning the non-return valve (if required)

Proceed as follows:

1. Close the isolating valves in the discharge pipe and in the

inlet pipe (if fitted) or drain the discharge pipe by tightening the drain screw on the side of the non-return valve. See fig. 5.

2. Clean the non-return valve via its inspection cover.

Replace the gasket of the inspection cover when reassembling the non-return valve.

10.1 Mechanical maintenance

Caution

Note

• Remove possible deposits and/or sludge build-up in the collecting tank.

• Remove any blockages on the inlet side of the lifting station. A blockage will typically be a large solid object.

• Check and replace the gaskets of connections at valves, etc., if necessary.

• Check the tank for cracks and deformations. These may occur in case of faulty assembly and therefore excessive stress on the tank.

Note: The above list is not complete. The lifting station may be installed in environments which require thorough and frequent maintenance.

10.2 Motor

Check the direction of rotation of the pump in the following way:

• Turn off the power.

• Unscrew the lifting eye on top of motor. See fig. 31.

• The top of the motor shaft is now visible. See fig. 32. Check that rotor and impeller can be turned freely by turning the shaft with a large slotted screwdriver.

English (GB)

TM05 0344 1011TM05 0330 1011

Fig. 33 Vent holes in pump housing and collecting tank

Fig. 31 Lifting eye

Fig. 32 Top of slotted motor shaft

If the pump has been disassembled, remember to align the vent hole in the pump with the vent hole in the tank when remounting the pump to the tank. See figures 33 and 34.

TM05 0338 1011TM05 0339 1011

Fig. 34 Alignment marks on tank and pump flange

10.3 Electrical maintenance

• Check the gasket of the LC 221 cabinet front cover and of the cable entries.

• Check the cable connections.

• Check the controller functions.

• Check and clean the level sensor. See section 10.4 Cleaning

the level sensor.

• If LC 221 is installed in a particularly moist environment in a basement, we recommend checking the terminals on the PCB in order to identify possible corrosion. In typical installations, the contacts will work for several years and do not require any inspection.

• Replace the 9 V battery, if fitted, in connection with annual service.

The above list is not complete. LC 221 may be installed in environments which require thorough and frequent maintenance.

10.4 Cleaning the level sensor

English (GB)

1. Push the ON-OFF-AUTO selector switch to position OFF ( ). See section 5.2.2 Control panel.

2. Loosen the screw cap by turning it counterclockwise. See fig. 35.

3. Lift the pressure tube carefully out of the collecting tank. Do not lift it by means of the hose.

4. Check for possible deposits on or in the pressure tube. See section 5.1.6 Level sensor.

5. Scrape off any deposits. If necessary, remove the hose from the controller, and rinse the tube and hose with clean water at low pressure. Make sure no water remains in the hose.

6. Refit the pressure tube by screwing the screw cap on to the tank. Reconnect the hose to the controller.

7. Check the sensor by test running Multilift MD, MLD.

Fig. 35 Removing the level sensor

10.5 Contaminated lifting station or components

Warning If a Multilift lifting station has been used for a liquid

which is injurious to health or toxic, it will be classified as contaminated.

If Grundfos is requested to service the lifting station, Grundfos must be contacted with details about the pumped liquid, etc. before the lifting station is returned for service. Otherwise Grundfos can refuse to accept the lifting station for service.

Lifting stations which have been in contact with the pumped liquid must be thoroughly cleaned before they are returned to Grundfos.

Any costs of returning the lifting station are to be paid by the customer.

However, any application for service (no matter to whom it may be made) must include details about the pumped liquid if the lifting station has been used for liquids which are injurious to health or toxic.

TM05 0545 1011

11. Fault finding

Warning Before carrying out any work on lifting stations used for pumping liquids which might be hazardous to health, make sure that

the lifting station has been thoroughly flushed with clean water and that the discharge pipe has been drained. Rinse the parts in water after dismantling. Make sure that the isolating valves have been closed. The work must be carried out in accordance with local regulations.

Before making any connections in the LC 221 or work on lifting stations, etc., it must be ensured that the power supply has been switched off and that it cannot be accidentally switched on.

Fault Cause Remedy

1. The pump(s) does/do not run.

2. The sensor signal is out of range. All pumps are started and high level alarm is on.

3. The pump(s) is/are starting/stopping too frequently and even if there is no inflow.

4. One pump starts sometimes without visible reason.

a) No power supply.

None of the indicator lights are on. With battery back-up: See section 5.2 LC 221 controller.

b) The ON-OFF-AUTO selector switch is in position

OFF ( ), see section 6. Operating LC 221

controller.

c) Control circuit fuses are blown. Check and eliminate the cause. Replace the control

d) The motor-protective circuit breaker has cut out

the pump (only relevant if a motor-protective circuit breaker has been installed). The pump symbol in the display is flashing and the red indicator light for fault is flashing. The fault indication in the display is RELAY and the fault code is F018.

e) Motor/supply cable is defective or the connections

have become loose.

f) The fault indication in the display is SENSOR and

in the fault code is F005 and/or F006.

g) The module power circuit board or the LCD board

is defective. a) Discharge valves are not all opened. Open all discharge isolating valves. b) There is a blockage in the tank or pump. Remove blockage. c) The pump venting is not working, which means

that the pump cannot built pressure. d) The lifting station is undersized. Recalculate the inflow parameters and compare with

a) The level sensor fails. The sensor gives wrong

signal. b) The operating time protection is activated, the

pump and time symbols are flashing, the red LED

is flashing and the display indicates fault code

F011 and/or F012. If the pump runs longer than 3

minutes, a protection program of the controller will

stop the pump for 3 minutes and the other pump

will take over. At the next start impulse, the first

pump will be activated again. If the venting

problem persists, the pump will be stopped after 3

minutes and so on.

Note: Normal operating times are up to

60 seconds depending on duty point and effective

tank volume. c) The thermal switch has cut out the pump. The

pump and thermal switch symbols on the display

are flashing, and the red indicator light for fault is

permanently on. The fault indication in the display

is TEMP and in the fault code is F005 and/or

F006.

a) Test run 24 hours after last operation. No action necessary. It is a safety function that

Switch on the power supply or wait until the power cut is over. During the power cut, drain the collecting tank with diaphragm pump.

Push the ON-OFF-AUTO selector switch into position ON ( ) or AUTO ( ).

circuit fuses. Check the pump and tank as well as the setting of the motor-protective circuit breaker. If the pump is

blocked, remove the blockage. If the setting of the motor-protective circuit breaker is wrong, readjust it (compare the setting with the nameplate).

Check motor and supply cable. Replace cable or retighten connections if necessary. Clean the level sensor (see section 10.4 Cleaning the

level sensor), and start up again. Check the cable and

the connection on the controller board. If the signal is still wrong, please call Grundfos service.

Replace the PCB or LCD board.

Remove blockage from the pump venting hole, located above the impeller.

the size and pumping volume of the lifting station. Contact the nearest Grundfos sales company for ordering a new product if needed.

Clean the level sensor (see section 10.4 Cleaning the level sensor). Check that the discharge valve is open. Check the venting of the pump housing. If blocked clean the vent hole. See fig. 33.

Allow the pump to cool. After cooling, the pump will restart automatically unless the LC 221 has been set to manual restarting. See section 8.4 Setting of LC

221. If so, the ON-OFF-AUTO selector switch must be

pushed into position OFF ( ) for a short period. Check the inflow parameters and the non-return valve. The risk is low, but if the non-return valve flap is leaky,

liquid in the discharge pipe can flow back. A high number of starts without cooling time in

between over a longer period can cause thermal cut-out. Consider S3 duty. See section 12. Technical

data.

See also section 10.4 Cleaning the level sensor.

prevents the shaft sealing from seizing up.

English (GB)

12. Technical data

English (GB)

12.4 LC 221 controller

12.1 Lifting station

Weight:

Temperature range:

Flood conditions: Max. 2 m for 7 days

Sound pressure level:

Depending on variant. See nameplates

0-40 °C For short periods up to 60 °C (max. 5 minutes per hour)

< 70 dB(A) according to EN 12050-1 and the Machinery Directive

12.2 Collecting tank

Material: PE (polyethylene)

12.3 Pump

Motor

Mains frequency: 50 Hz Isolation class: F (155 °C) Impeller type: Vortex Enclosure class: IP68 pH-range: 4-10 Starts per hour: Max. 60 Max density of liquid: 1100 kg/m

Controller

Voltage variants, rated voltages:

Voltage tolerances for LC 221: - 10 %/+ 6 % of rated voltage Mains frequency for LC 221: 50/60 Hz Supply system earthing: For TN systems Controller power consumption: 6 W

Control circuit fuse:

Ambient temperature:

During operation:

In stock: Enclosure class: IP55 Potential-free contacts: NO/NC, max. 250 VAC / 2 A Input external reset: 230 V

Cabinet of LC 221

External dimensions:

Material:

Weight:

1 x 230 V, 3 x 230 V, 3 x 400 V

Fine-wire fuse: 100 mAT / 250 V / 20 mm x ∅5

0 to +40 °C (must not be exposed to direct sunlight)

-30 to +60 °C

Height = 390 mm Width = 262 mm Depth = 142 mm

ABS (acrylonitrile butadiene styrene)

Depending on variant. See nameplate

Component Material

Pump housing Cast iron Impeller PPE+PS

Pump shaft

Motor cable Polychloroprene O-rings NBR rubber

Multilift MD Multilift MLD

MD/MLD.12.1.4

MD/MLD.12.3.4 3 x 400 V 1.8 / 1.5 3.7 / 19 CEE 3P+N+E, 16 A

MD/MLD.15.1.4 1 x 230 V 2.3 / 1.7 10.1 / 39

MD/MLD.15.3.4 3 x 400 V 2.3 / 1.8 4 / 19 CEE 3P+N+E, 16 A MD/MLD.22.3.4 MD/MLD.22.3.4 3 x 400 V 5.5 / 29.7 CEE 3P+N+E, 16 A MD/MLD.24.3.2 3 x 230 V MD/MLD.24.3.2 3 x 400 V 5.5 / 39 CEE 3P+N+E, 16 A MD/MLD.32.3.2 3 x 230 V MD/MLD.32.3.2 3 x 400 V 6.7 / 39 CEE 3P+N+E, 16 A MD/MLD.38.3.2 MD/MLD.38.3.2 3 x 400 V 7.5 / 39 CEE 3P+N+E, 16 A

S3 -50 %, 1 min.

S3 -40 %, 1 min.

Stainless steel, DIN W.-Nr. 1.4301

Duty Voltage [V]

1 x 230 V 1.9 / 1.4 9 / 39

3 x 230 V

Power P1 / P2

[kW]

2.8 / 2.3

3.1 / 2.6

4.0 / 3.4

4.6 / 3.9

/ I

1/1

start

10.2 / 51.5

9.7 / 88.7

88.7

13 / 88.7

[A] RPM [min-1]

1430 4

1410 4

1430 4

2920 2

2880 2

Number of

poles

Plug type

E/F, I

CEE 3P+E 16 A

13. Disposal

This product or parts of it must be disposed of in an environmentally sound way:

1. Use the public or private waste collection service.

2. If this is not possible, contact the nearest Grundfos company or service workshop.

The crossed-out wheelie bin symbol on a product means that it must be disposed of separately from household waste. When a product marked with this symbol reaches its end of life, take it to a collection

point designated by the local waste disposal authorities. The separate collection and recycling of such products will help protect the environment and human health.

Appendix 1

Fig. A - Dimensional sketches - MD

Appendix

TM05 0441 1011

Appendix

Fig. B - Dimensional sketches - MLD

TM05 0442 1011

Argentina

Bombas GRUNDFOS de Argentina S.A. Ruta Panamericana km. 37.500 Centro Industrial Garin 1619 Garín Pcia. de B.A. Phone: +54-3327 414 444 Telefax: +54-3327 45 3190

Australia

GRUNDFOS Pumps Pty. Ltd. P.O. Box 2040 Regency Park South Australia 5942 Phone: +61-8-8461-4611 Telefax: +61-8-8340 0155

Austria

GRUNDFOS Pumpen Vertrieb Ges.m.b.H. Grundfosstraße 2 A-5082 Grödig/Salzburg Tel.: +43-6246-883-0 Telefax: +43-6246-883-30

Belgium

N.V. GRUNDFOS Bellux S.A. Boomsesteenweg 81-83 B-2630 Aartselaar Tél.: +32-3-870 7300 Télécopie: +32-3-870 7301

Belarus

Представительство ГРУНДФОС в Минске 220125, Минск ул. Шафарнянская, 11, оф. 56, БЦ «Порт» Тел.: +7 (375 17) 286 39 72/73 Факс: +7 (375 17) 286 39 71

E-mail: minsk@grundfos.com

Bosnia and Herzegovina

GRUNDFOS Sarajevo Zmaja od Bosne 7-7A, BH-71000 Sarajevo Phone: +387 33 592 480 Telefax: +387 33 590 465 www.ba.grundfos.com e-mail: grundfos@bih.net.ba

Brazil

BOMBAS GRUNDFOS DO BRASIL Av. Humberto de Alencar Castelo Branco, 630 CEP 09850 - 300 São Bernardo do Campo - SP Phone: +55-11 4393 5533 Telefax: +55-11 4343 5015

Bulgaria

Grundfos Bulgaria EOOD Slatina District Iztochna Tangenta street no. 100 BG - 1592 Sofia Tel. +359 2 49 22 200 Fax. +359 2 49 22 201 email: bulgaria@grundfos.bg

Canada

GRUNDFOS Canada Inc. 2941 Brighton Road Oakville, Ontario L6H 6C9 Phone: +1-905 829 9533 Telefax: +1-905 829 9512

China

GRUNDFOS Pumps (Shanghai) Co. Ltd. 10F The Hub, No. 33 Suhong Road Minhang District Shanghai 201106 PRC Phone: +86 21 612 252 22 Telefax: +86 21 612 253 33

COLOMBIA

GRUNDFOS Colombia S.A.S. Km 1.5 vía Siberia-Cota Conj. Potrero Chico, Parque Empresarial Arcos de Cota Bod. 1A. Cota, Cundinamarca Phone: +57(1)-2913444 Telefax: +57(1)-8764586

Croatia

GRUNDFOS CROATIA d.o.o. Buzinski prilaz 38, Buzin HR-10010 Zagreb Phone: +385 1 6595 400 Telefax: +385 1 6595 499 www.hr.grundfos.com

GRUNDFOS Sales Czechia and Slovakia s.r.o.

Čajkovského 21 779 00 Olomouc Phone: +420-585-716 111

Denmark

GRUNDFOS DK A/S Martin Bachs Vej 3 DK-8850 Bjerringbro Tlf.: +45-87 50 50 50 Telefax: +45-87 50 51 51 E-mail: info_GDK@grundfos.com www.grundfos.com/DK

Estonia

GRUNDFOS Pumps Eesti OÜ Peterburi tee 92G 11415 Tallinn Tel: + 372 606 1690 Fax: + 372 606 1691

Finland

OY GRUNDFOS Pumput AB Trukkikuja 1 FI-01360 Vantaa Phone: +358-(0) 207 889 500

France

Pompes GRUNDFOS Distribution S.A. Parc d’Activités de Chesnes 57, rue de Malacombe F-38290 St. Quentin Fallavier (Lyon) Tél.: +33-4 74 82 15 15 Télécopie: +33-4 74 94 10 51

Germany

GRUNDFOS GMBH Schlüterstr. 33 40699 Erkrath Tel.: +49-(0) 211 929 69-0 Telefax: +49-(0) 211 929 69-3799 e-mail: infoservice@grundfos.de Service in Deutschland: e-mail: kundendienst@grundfos.de

Greece

GRUNDFOS Hellas A.E.B.E. 20th km. Athinon-Markopoulou Av. P.O . B o x 71 GR-19002 Peania Phone: +0030-210-66 83 400 Telefax: +0030-210-66 46 273

Hong Kong

GRUNDFOS Pumps (Hong Kong) Ltd. Unit 1, Ground floor Siu Wai Industrial Centre 29-33 Wing Hong Street & 68 King Lam Street, Cheung Sha Wan Kowloon Phone: +852-27861706 / 27861741 Telefax: +852-27858664

Hungary

GRUNDFOS Hungária Kft. Tópark u. 8 H-2045 Törökbálint, Phone: +36-23 511 110 Telefax: +36-23 511 111

India

GRUNDFOS Pumps India Private Limited 118 Old Mahabalipuram Road Thoraipakkam Chennai 600 096 Phone: +91-44 2496 6800

Indonesia

PT. GRUNDFOS POMPA Graha Intirub Lt. 2 & 3 Jln. Cililitan Besar No.454. Makasar, Jakarta Timur ID-Jakarta 13650 Phone: +62 21-469-51900 Telefax: +62 21-460 6910 / 460 6901

Ireland

GRUNDFOS (Ireland) Ltd. Unit A, Merrywell Business Park Ballymount Road Lower Dublin 12 Phone: +353-1-4089 800 Telefax: +353-1-4089 830

Italy

GRUNDFOS Pompe Italia S.r.l. Via Gran Sasso 4 I-20060 Truccazzano (Milano) Tel.: +39-02-95838112 Telefax: +39-02-95309290 / 95838461

Japan

GRUNDFOS Pumps K.K. 1-2-3, Shin-Miyakoda, Kita-ku, Hamamatsu 431-2103 Japan Phone: +81 53 428 4760 Telefax: +81 53 428 5005

Korea

GRUNDFOS Pumps Korea Ltd. 6th Floor, Aju Building 679-5 Yeoksam-dong, Kangnam-ku, 135-916 Seoul, Korea Phone: +82-2-5317 600 Telefax: +82-2-5633 725

Latvia

SIA GRUNDFOS Pumps Latvia Deglava biznesa centrs Augusta Deglava ielā 60, LV-1035, Rīga, Tālr.: + 371 714 9640, 7 149 641 Fakss: + 371 914 9646

Lithuania

GRUNDFOS Pumps UAB Smolensko g. 6 LT-03201 Vilnius Tel: + 370 52 395 430 Fax: + 370 52 395 431

Malaysia

GRUNDFOS Pumps Sdn. Bhd. 7 Jalan Peguam U1/25 Glenmarie Industrial Park 40150 Shah Alam Selangor Phone: +60-3-5569 2922 Telefax: +60-3-5569 2866

Mexico

Bombas GRUNDFOS de México S.A. de C.V. Boulevard TLC No. 15 Parque Industrial Stiva Aeropuerto Apodaca, N.L. 66600 Phone: +52-81-8144 4000 Telefax: +52-81-8144 4010

Netherlands

GRUNDFOS Netherlands Velu we zo om 35 1326 AE Almere Postbus 22015 1302 CA ALMERE Tel.: +31-88-478 6336 Telefax: +31-88-478 6332 E-mail: info_gnl@grundfos.com

New Zealand

GRUNDFOS Pumps NZ Ltd. 17 Beatrice Tinsley Crescent North Harbour Industrial Estate Albany, Auckland Phone: +64-9-415 3240 Telefax: +64-9-415 3250

Norway

GRUNDFOS Pumper A/S Strømsveien 344 Postboks 235, Leirdal N-1011 Oslo Tlf.: +47-22 90 47 00 Telefax: +47-22 32 21 50

Poland

GRUNDFOS Pompy Sp. z o.o. ul. Klonowa 23 Baranowo k. Poznania PL-62-081 Przeźmierowo Tel: (+48-61) 650 13 00 Fax: (+48-61) 650 13 50

Portugal

Bombas GRUNDFOS Portugal, S.A. Rua Calvet de Magalhães, 241 Apartado 1079 P-2770-153 Paço de Arcos Tel.: +351-21-440 76 00 Telefax: +351-21-440 76 90

Romania

GRUNDFOS Pompe România SRL Bd. Biruintei, nr 103 Pantelimon county Ilfov Phone: +40 21 200 4100 Telefax: +40 21 200 4101 E-mail: romania@grundfos.ro

Russia

ООО Грундф ос Россия ул. Школьная, 39-41 Москва, RU-109544, Russia Тел. (+7) 495 564-88-00 (495) 737-30-00 Факс (+7) 495 564 8811

E-mail grundfos.moscow@grundfos.com

Serbia

Grundfos Srbija d.o.o. Omladinskih brigada 90b 11070 Novi Beograd Phone: +381 11 2258 740 Telefax: +381 11 2281 769 www.rs.grundfos.com

Singapore

GRUNDFOS (Singapore) Pte. Ltd. 25 Jalan Tukang Singapore 619264 Phone: +65-6681 9688 Telefax: +65-6681 9689

Slovakia

GRUNDFOS s.r.o. Prievozská 4D 821 09 BRATISLAVA Phona: +421 2 5020 1426 sk.grundfos.com

Slovenia

GRUNDFOS LJUBLJANA, d.o.o. Leskoškova 9e, 1122 Ljubljana Phone: +386 (0) 1 568 06 10 Telefax: +386 (0)1 568 06 19 E-mail: tehnika-si@grundfos.com

South Africa

GRUNDFOS (PTY) LTD Corner Mountjoy and George Allen Roads Wilbart Ext. 2 Bedfordview 2008 Phone: (+27) 11 579 4800 Fax: (+27) 11 455 6066 E-mail: lsmart@grundfos.com

Spain

Bombas GRUNDFOS España S.A. Camino de la Fuentecilla, s/n E-28110 Algete (Madrid) Tel.: +34-91-848 8800 Telefax: +34-91-628 0465

Sweden

GRUNDFOS AB Box 333 (Lunnagårdsgatan 6) 431 24 Mölndal Tel.: +46 31 332 23 000 Telefax: +46 31 331 94 60

Switzerland

GRUNDFOS Pumpen AG Bruggacherstrasse 10 CH-8117 Fällanden/ZH Tel.: +41-44-806 8111 Telefax: +41-44-806 8115

Taiwan

GRUNDFOS Pumps (Taiwan) Ltd. 7 Floor, 219 Min-Chuan Road Taichung, Taiwan, R.O.C. Phone: +886-4-2305 0868 Telefax: +886-4-2305 0878

Thailand

GRUNDFOS (Thailand) Ltd. 92 Chaloem Phrakiat Rama 9 Road, Dokmai, Pravej, Bangkok 10250 Phone: +66-2-725 8999 Telefax: +66-2-725 8998

Turkey

GRUNDFOS POMPA San. ve Tic. Ltd. Sti. Gebze Organize Sanayi Bölgesi Ihsan dede Caddesi,

2. yol 200. Sokak No. 204 41490 Gebze/ Kocaeli Phone: +90 - 262-679 7979 Telefax: +90 - 262-679 7905 E-mail: satis@grundfos.com

Ukraine

Бізнес Центр Європа Столичне шосе, 103 м. Київ, 03131, Україна Телефон : (+38 044) 237 04 00 Факс.: (+38 044) 237 04 01

E-mail: ukraine@grundfos.com

United Arab Emirates

GRUNDFOS Gulf Distribution P.O. Box 16768 Jebel Ali Free Zone Dubai Phone: +971 4 8815 166 Telefax: +971 4 8815 136

United Kingdom

GRUNDFOS Pumps Ltd. Grovebury Road Leighton Buzzard/Beds. LU7 4TL Phone: +44-1525-850000 Telefax: +44-1525-850011

U.S.A.

GRUNDFOS Pumps Corporation 9300 Loiret Blvd. Lenexa, Kansas 66219 Phone: +1-913-227-3400 Telefax: +1-913-227-3500

Uzbekistan

Grundfos Tashkent, Uzbekistan The Representative Office of Grundfos Kazakhstan in Uzbekistan 38a, Oybek street, Tashkent Телефон: (+998) 71 150 3290 / 71 150 3291 Факс: (+998) 71 150 3292

Addresses Revised 14.03.2018

Grundfos companies

98127059 1218

ECM: 1217058

www.grundfos.com

Trademarks displayed in this material, including but not limited to Grundfos, the Grundfos logo and “be think innovate” are registered trademarks owned by The Grundfos Group. All rights reserved. © 2018 Grundfos Holding A/S, all rights reserved.

Grundfos Multifit MD Series, Multifit MLD Series Installation And Operating Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

English (GB)

1. Symbols used in this document

2. Scope of delivery

2.1 MD

2.2 MLD

3. General description

3.1 Applications

5.1 Lifting station

4. Transportation and storage

5. Product description

5.1.1 Collecting tank

5.1.2 Pumps

5.1.3 Shaft seal

5.1.4 Motor cable

5.1.5 Non-return valve

5.2 LC 221 controller

5.1.6 Level sensor

5.2.1 Design

5.2.2 Control panel

5.2.3 Internal layout of LC 221

6. Operating LC 221 controller

6.1 Description of display

6.2 Setup menu

6.3 Information menu

6.4 Description of fault indications

7. Installation of lifting station

7.1 General description

7.1.1 Installation sketches

7.2 Guidelines for installation of lifting station

7.3 Procedure for installation of lifting station

7.3.1 Inlet pipe connections, Multilift MD

7.3.2 Inlet pipe connections, Multilift MLD

7.3.3 Further connections for Multilift MD and MLD

8. Installation of LC 221 controller

8.1 Location

8.2 Mechanical installation

8.3 Electrical connection

8.4 Setting of LC 221

8.4.1 External alarm

8.5 Wiring diagrams

9. Startup

10. Maintenance and service

10.1 Mechanical maintenance

10.2 Motor

10.3 Electrical maintenance

10.4 Cleaning the level sensor

10.5 Contaminated lifting station or components

11. Fault finding

12. Technical data

12.4 LC 221 controller

12.1 Lifting station

12.2 Collecting tank

12.3 Pump

13. Disposal

Appendix