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Summary of Contents for Grundfos Multifit MD Series
- Page 1 GRUNDFOS INSTRUCTIONS Multilift MD, MLD Installation and operating instructions Other languages http://net.grundfos.com/qr/i/98127059...
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Page 2: Table Of Contents
Setup menu Information menu 2.1 MD Description of fault indications Grundfos Multilift MD lifting stations are supplied complete with Installation of lifting station collecting tank, butterfly-non-return valves, a sensor unit with General description cable and two pumps with cable, both connected to the LC 221 Guidelines for installation of lifting station controller. -
Page 3: General Description
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. Fig. 1 Multilift MD front and rear view Fig. -
Page 4: Applications
Grundfos Multilift MD and MLD lifting stations connected to the LC 221 controller incorporating a level sensor. are designed for the collection and pumping of the following... - Page 5 5.1.1 Collecting tank The gas-, odour- and pressure-tight collecting tank is made of wastewater resistant polyethylene (PE) and has all necessary http://net.grundfos.com/qr/i/98288126 ports for the connection of inlet pipes, discharge pipe, venting pipe and a manually operated diaphragm pump, which is available as an accessory.
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Page 6: Lc 221 Controller
The LC 221 is a level controller specially designed for controlling internal flap in order to drain the discharge pipe in case of and monitoring the Grundfos lifting stations, Multilift MD and maintenance or service. The valve is designed and tested MLD. - Page 7 • setting of delay times: Type key, LC 221 controller – stopping delay (time from the stop level is reached till the Example LC 221 .2 .230 .1 .10 .30 pump is stopped) - reduces water hammer if pipes are long –...
- Page 8 5.2.1 Design Display (pos. 1) The display shows all relevant operating data and fault indications. The LC 221 level controller incorporates the necessary The operation and fault indications are described in section components to control and protect the pumps, such as relays and 6.1 Description of display.
- Page 9 5.2.3 Internal layout of LC 221 Figure shows the 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. Fig. 10 Internal layout LC 221 (three-phase PCB as example) Pos.
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Page 10: Operating Lc 221 Controller
6. Operating LC 221 controller 6.1 Description of display The display of the LC 221 level controller is shown in fig. 11. 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... - Page 11 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.
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Page 12: Setup Menu
6.2 Setup menu The following settings can be made: • start level 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 • rated current phase. See section 8.4 Setting of LC 221. -
Page 13: Information Menu
6.3 Information menu In the information menu the following data can be read: • fault indications All status data and fault indications can be seen in the information menu. The information menu can be seen in all operating modes • operating hours (ON-OFF-AUTO). -
Page 14: Description Of Fault Indications
6.4 Description of fault indications 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. - Page 15 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.
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Page 16: Installation Of Lifting Station
7. Installation of lifting station 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. -
Page 17: Guidelines For Installation Of Lifting Station
7.2 Guidelines for installation of lifting station 7.3 Procedure for installation of lifting station The guidelines for correct mechanical installation of lifting station 7.3.1 Inlet pipe connections, Multilift MD are according to EN 12056-4. 1. Check the scope of delivery. See section 7.1.1 Installation sketches. - Page 18 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. 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.
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Page 19: Installation Of Lc 221 Controller
7.3.2 Inlet pipe connections, Multilift MLD 4. Fix the tank to the floor. 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. -
Page 20: Electrical Connection
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 press the button to save the desired value. -
Page 21: Wiring Diagrams
8.5 Wiring diagrams Fig. 29 Wiring diagram, three-phase Multilift MD/MLD.22.3.4 with contactors Fig. 27 Wiring diagram, single-phase Multilift MD/MLD.12.1.4 and MD/MLD.15.1.4 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 Fig. 28 Wiring diagram, three-phase Multilift MD/MLD.12.3.4 and MD/MLD.15.3.4... -
Page 22: Startup
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. -
Page 23: Mechanical Maintenance
10.1 Mechanical maintenance • 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. -
Page 24: Cleaning The Level Sensor
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. -
Page 25: Fault Finding
The lifting station is undersized. Recalculate the inflow parameters and compare with the size and pumping volume of the lifting station. Contact the nearest Grundfos sales company for ordering a new product if needed. 3. The pump(s) is/are a) The level sensor fails. The sensor gives wrong... -
Page 26: Technical Data
1. Use the public or private waste collection service. symbol reaches its end of life, take it to a collection 2. If this is not possible, contact the nearest Grundfos company point designated by the local waste disposal or service workshop. - Page 27 Appendix Fig. A - Dimensional sketches - MD...
- Page 28 Fig. B - Dimensional sketches - MLD...
- Page 29 BOMBAS GRUNDFOS DO BRASIL Turkey Siu Wai Industrial Centre GRUNDFOS Pumper A/S Av. Humberto de Alencar Castelo Branco, GRUNDFOS POMPA San. ve Tic. Ltd. Sti. 29-33 Wing Hong Street & Strømsveien 344 Gebze Organize Sanayi Bölgesi CEP 09850 - 300...
- Page 30 98127059 1218 ECM: 1217058 www.grundfos.com...
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