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Grunbeck MRA25 Operation Manual

Backwash filter
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Backwash filter | MRA25 – MRA100
Operation manual

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  • Page 1 We understand water. Backwash filter | MRA25 – MRA100 Operation manual...
  • Page 2 General Contact Germany International Sales Phone +49 9074 41-145 Service Phone 09074 41-333 service@gruenbeck.de Availability Monday to Thursday 7:00 am - 6:00 pm Friday 7:00 am - 4:00 pm We reserve the right to technical modifications. © by Grünbeck Wasseraufbereitung GmbH Original operation manual Edition: July 2023 Order no.: 100232920000_en_004...

  • Page 3: Table Of Contents

    Requirements for the installation site ....... 26 Checking the scope of supply ........27 12.1 Backwash filters MRA25/MRA32 ......89 Water installation ............. 28 12.2 Pressure loss curves of MRA25 (1") and MRA32 Electrical installation ..........36 (1¼") .................91 12.3 Backwash filters MRA40/MRA50 ......92 12.4 Pressure loss curves of MRA40 (1½") and MRA50...

  • Page 4: Introduction

    Illustrations in this manual are for basic understanding and can differ from the actual design. Validity of the manual This manual applies to the products below: ● Backwash filter MRA25 ● Backwash filter MRA32 ● Backwash filter MRA40 ● Backwash filter MRA50 ●...
  • Page 5 Introduction The type plate is located on the front and the rear of the filter housing. Designation Designation Obey the operation manual Water temperature in the drinking water sector Date of manufacture Nominal pressure CE mark Nominal flow Disposal information Nominal connection diameter Max./min.

  • Page 6: Symbols Used

    Introduction Symbols used Symbol Meaning Danger and risk Important information or requirement Useful information or tip Written documentation required Reference to further documents Work that must be carried out by qualified specialists only Work that must be carried out by qualified electricians only Work that must be carried out by technical service personnel only Depiction of warnings This manual contains information and instructions that you must obey for your personal...

  • Page 7: Demands On Personnel

    Introduction Demands on personnel During the individual life cycle phases of the product, different people carry out work on the product. The respective tasks require different skills. 1.5.1 Qualification of personnel Personnel Requirements • No special expertise required User • Knowledge of the tasks assigned •...
  • Page 8 Introduction 1.5.3 Personal protective equipment ► As an owner/operator/operating company, make sure that the required personal protective equipment is available. The components below fall under the heading of personal protective equipment (PPE): Protective gloves Protective footwear 8 | 104...

  • Page 9: Safety

    Safety Safety Safety measures ● Only operate your product if all components are installed properly. ● Obey the local regulations on drinking water protection, accident prevention and occupational safety. ● Do not make any changes, alterations or extensions on your product. Only use genuine spare parts for maintenance or repair.
  • Page 10 Safety 2.1.3 Electrical hazards There is an immediate danger of fatal injury from electric shock when touching live parts. Damage to the insulation or individual components can be lethal. ● Only have a qualified electrician carry out electrical work on the system. ●...

  • Page 11: Product-Specific Safety Instructions

    Safety Product-specific safety instructions SELV (Safety Extra Low Voltage): Protection by means of safety extra low voltage The product is only and exclusively designed for operation and use with SELV. By using the power supply unit supplied with the system, this requirement is fulfilled. Do not modify the product as this can affect compliance with safety standards and result in serious injury or damage to property.

  • Page 12: Conduct In Emergencies

    Safety Conduct in emergencies 2.3.1 In case of water leaks 1. Close the shut-off valves for the water flow upstream and downstream of the product. 2. De-energise the product. a Unplug the power supply unit from the socket. 3. Locate the leak. 4.

  • Page 13: Product Description

    Product description Product description Intended use ● The MRA backwash filters are designed for the filtration of drinking and industrial water. ● The filters are suitable for the filtration of process, boiler feed, cooling and air con- ditioning water (only in partial flow). ●...
  • Page 14 Product description Version with screw connections 1" (DN 25), 1¼" (DN 32), 1½" (DN 40), 2" (DN 50) Designation Designation Universal adapter (type C), Euro plug Brush Taiwan adapter (type A/B), optional Sieve bottom Power supply unit Suction nozzle (valve) Control unit with display Filter element Water meter screw connection...
  • Page 15 Product description Version with flange connections DN 65, DN 80, DN 100 Designation Designation Blind plug Connections for pressure sensors Flange connection acc. to DIN EN 1092-1 Connection for safety solenoid valve Holes for cable gland M12/M20 Connection cable of power supply unit, (external signal line) 2 m in length 15 | 104...

  • Page 16: Functional Description

    Product description Functional description The unfiltered raw water flows into the filter from the inlet side and from the inside out through the filter element and to the pure water outlet. Thus, foreign particles of a size > 100 µm are retained. Depending on their size and weight, foreign particles stick to the filter element, or they fall straight down into the filter funnel.
  • Page 17 Product description 3.3.1 Backwash via control unit Designation Designation Outlet pressure sensor (optional) Microswitch Inlet pressure sensor (optional) Drive unit Safety solenoid valve (optional) Cam disc Nozzle screw 17 | 104...
  • Page 18 Product description Backwash process The control unit releases backwash processes by way of set time intervals and monitors the number of backwash processes. The backwash lock can be activated by means of a lock time. When optional pressure sensors are used, the control unit can also start a backwash via the adjustable differential pressure (preset to 0.4 bar).
  • Page 19 Product description 3.3.2 Parallel operation of two filters Parallel piping Parallel piping for various sizes and materials (refer to chapter Accessories 3.4). 19 | 104...

  • Page 20: Accessories

    Product description Accessories You can retrofit your product with accessories. Please contact your local Grünbeck repre- sentative or Grünbeck’s headquarters in Hoechstaedt/Germany for details. Take into consideration that the availability of accessories can differ from country to country. As per DIN EN 13433-1, filter elements with pore sizes of 50 μm, 200 μm and 500 μm are not permitted for drinking water systems and might only be used after consultation with Grünbeck.
  • Page 21 Product description Illustration Product Order no. PVC version DN 80 Filter connection DN 50 552 200 DN 100 Filter connection DN 65 552 201 DN 100 Filter connection DN 80 552 205 DN 125 Filter connection DN 80 552 210 DN 150 Filter connection DN 100 552 215...

  • Page 22: Transport And Storage

    Transport and storage Transport and storage Shipping/Delivery/Packaging The product is packed in a cardboard box at the factory and secured with a foam bag. ► Upon receipt, immediately check for completeness and transport damage. ► In case of visible transport damage, proceed as follows: •...

  • Page 23: Installation

    Installation Installation The installation of the product represents a major intervention into the drinking water sys- tem and must be carried out by a qualified specialist only. In accordance with DIN EN 806-2 and DIN EN 1717, the product is to be installed in the wa- ter pipe downstream of the water meter and upstream of distribution pipes and the appli- ances to be protected.
  • Page 24 Installation Installation example: Backwash filter with optional accessories Designation Designation Inlet shut-off valve Safety solenoid valve (optional) Socket Piping to be provided by the client on site Inlet and outlet pressure sensors (optional) Drain connection DN 50 acc. to DIN EN 1717 Outlet shut-off valve Optional equipment ►...
  • Page 25 Installation Installation example: Backwash filter with flange connections Designation Designation Inlet shut-off valve Piping to be provided by the client on site Outlet shut-off valve Drain connection DN 50 acc. to DIN EN 1717 Socket Optional adapter kit 25 | 104...

  • Page 26: Requirements For The Installation Site

    Installation Requirements for the installation site Obey the local installation directives, general guidelines and technical specifications. ● Protection from frost, severe heat exposure and direct sunlight ● Protection from chemicals, dyes, solvents and their vapours ● Ambient temperature and radiation temperature in the immediate vicinity •...

  • Page 27: Checking The Scope Of Supply

    Installation Checking the scope of supply Filters with screw connections for sizes: 1" (DN 25), 1¼" (DN 32), 1½" (DN 40), 2" (DN 50) Filters with flange connections for sizes: DN 65, DN 80, DN 100 Designation Designation Universal adapter (type C), Euro plug Flushing water connection Taiwan adapter (type A/B), optional Locknut...

  • Page 28: Water Installation

    Installation Water installation The filter must only be installed horizontally and free of mechanical stress. ► Use protective gloves and protective footwear during the installation. ► Install the filter with an auxiliary person. In case of hot water filtration WARNING Hot water and hot surfaces ●...
  • Page 29 Installation ► Check the flow direction given on site. ► Refit the filter’s pressure gauges, if necessary: Designation Designation Closing plug Pressure gauges for inlet and outlet pressure 1. Unscrew the closing plugs with O-ring as well as the pressure gauges. 2.
  • Page 30 Installation » The filter has been modified for flow direction from right to left. » The pressure gauges face forward when the filter is installed. The optional pressure sensors can be mounted on the back or, alternatively, on the front of the filter (refer to chapter 5.4.5).
  • Page 31 Installation 1. Install the water meter screw connection in the pipe. » The distance between the two seals must have the dimensions below: For 1"/1¼" = 190 mm and for 1½"/2" = 206 mm 2. Position the filter in the pipe. a Comply with the marking of the flow direction on the filter.
  • Page 32 Installation Installing the backwash filter (MRA DN 65 – DN 100) with flange connection 5.3.3 The backwash filters MRA DN 65, DN 80 and DN 100 are designed with flange connection PN 16 according to DIN EN 1092-1. ► Comply with the Technical specifications for the flange connection (refer to chapter 12.5).
  • Page 33 Installation 2. Position the filter in the pipe. a Comply with the marking of the flow direction on the filter. 3. By way of the screw connections, screw the filter to the flanges free of any me- chanical stress. a If necessary, install an (optional) adapter kit to ensure the function of the butter- fly valves.
  • Page 34 Installation 5.3.4 Installing the connection for the backwash water In case of MRA backwash filters with automatic backwash, it is mandatory to install a waste water pipe with drain connection. Refer to chapter 5.4.6, before installing an optional safety solenoid valve. CAUTION Splashing hot water during backwash ●...
  • Page 35 Installation 5.3.4.2 Installing the drain connection and the waste water pipe ► Install a drain connection (not included in the scope of supply). Refer to the mounting instructions of the drain connection (order no. 100105420000). ► Install a waste water pipe as HT piping to the drain connection. Designation Designation Waste water pipe to be provided by...

  • Page 36: Electrical Installation

    Installation Electrical installation The filters are equipped with a permanently connected power supply unit at the factory. The filters are only and exclusively designed for use with SELV (Safety Extra low Voltage). Repairs on the electrical system must be carried out by a qualified electrician only. DANGER Lethal voltage of 230 V ●...
  • Page 37 Installation 5.4.1.1 Plugging the adapter into the power supply unit 1. Move the slider downwards. 2. Plug the adapter into the power supply unit. 3. Check that the slider has locked the inserted adapter. 5.4.2 Connecting the power supply unit to the power supply Splash water can escape at the drain outlet and damage the power supply unit/power sup- ply due to a short-circuit.
  • Page 38 Installation NOTE Incorrect routing of the connection cable ● The connection cable can be damaged. This can result in a short-circuit. ► Route the connection cable in a way that it is not crushed, kinked, entangled or forms knots. ► Make sure that the connection cable does not touch other lines such as the water pipe, for instance.
  • Page 39 Installation Removing the control head 1. Loosen the rear screw of the control cover. 2. Lift the control unit by slightly tilting it forward. 3. Disconnect the plug connections of the position sensor technology X4, the drive unit X3 and the functional grounding. 4.
  • Page 40 Installation 8. Connect the signal lines to the terminal strip of the circuit board. a Comply with the terminal diagram or the label on the control head. Label of terminal strip The serial number label of the control unit is marked with a dot. The external input DIG IN (terminals 12 + 13) is supplied with voltage from an external source.
  • Page 41 Installation 13. Program the assigned inputs and outputs during start-up/commissioning (refer to chapter 7.4). a Use the keys to select the menu level b Set the parameters in the Inputs/Outputs menu. Parameters Setting options Input Inactive/backwash lock/backwash release/cascade Input contact Output 1 Inactive/backwash active/cascade/warning/error message Output contact...
  • Page 42 Installation X1 (J5) Power supply/communication Terminal Colour Function Signal Comments HS04 If the control unit is not the last link in a bus line – set HS04 to OFF Main switch for terminating resistor RS485 interface If the control unit is the termination in a bus line –...
  • Page 43 Installation 5.4.5 Installing the (optional) pressure sensors To measure the differential pressure, one pressure sensor is installed upstream of the filter element (inlet pressure) and one pressure sensor is installed downstream of the filter ele- ment (outlet pressure). The limit value of the differential pressure (preset at 0.4 bar) is programmed in the control unit.
  • Page 44 Installation Mounting the pressure sensors on the back Designation Designation Connecting cable with circular connector Blind plug M12x1 for pressure sensors Pressure sensors 1. Remove both blind plugs. 2. Screw in both pressure sensors (with inserted O-rings). Designation Designation Connection socket for inlet pressure Connection socket for outlet pressure 3.
  • Page 45 Installation Mounting the pressure sensors on the front Analogue reading of the inlet and outlet pressure on the pressure gauges would no longer be possible. ► If space is limited, mount the pressure sensors on the front of the filter. 1.
  • Page 46 Installation 5.4.6 Installing the (optional) safety solenoid valve When installing the safety solenoid valve, make sure not to damage the plug connection and the safety solenoid valve. ● The filter must be de-energised (voltage-free), so that no backwash will be re- leased during the installation of the safety solenoid valve.
  • Page 47 Installation Connecting the safety solenoid valve In idle mode, the safety solenoid valve is normally closed. In case of a backwash, the safety solenoid valve is supplied with power and opened. In the event of a power failure during backwash, the safety solenoid valve is closed automati- cally.

  • Page 48: Start-Up/Commissioning

    Start-up/commissioning Start-up/commissioning The initial start-up of the product must be carried out by a qualified specialist only. Putting the product into operation 6.1.1 Initial start-up Upon delivery, the valve of the backwash filter is open. The valve is closed automatically during start-up/commissioning.
  • Page 49 Start-up/commissioning You can also perform a guided start-up/commissioning later. e Confirm the query Drain connection established? with OK. Set the unit bar/psi/kPa for the pressure measurement (with connected pres- sure sensors only). g In case of hot water filtration, confirm the indication Use with hot water with OK –...
  • Page 50 Start-up/commissioning » The backwash process takes place in 3 steps: 1. Open valve, 2. Backwash, 3. Close valve. n Set the backwash interval to 180 d … 2 d/1 h … 47 h. o Set the required Differential pressure (only for version with pressure sensors, preset to 0.4 bar).

  • Page 51: Checking The Product

    Start-up/commissioning Checking the product ► Carry out the steps below after installation and after each maintenance: 1. Open the shut-off valves. 2. Open the closest water withdrawal point downstream of the filter to the maximum. a Apply the maximum operating pressure. »...

  • Page 52: Setting The Month Indicator

    Start-up/commissioning Setting the month indicator Designation Maintenance ring ► Set the maintenance ring to the month of the next maintenance. Handing over the product to the owner/operator/operating company ► Explain to the owner/operator/operating company how the product works. ► Use the manual to brief the owner/operator/operating company and answer any questions.

  • Page 53: Operation

    Operation Operation The filter is operated automatically and does not require any manual operation. The control unit carries out the release of a backwash and issues messages in the event of a malfunction. ► Inspect the filter at regular intervals (refer to chapter 8.3). ►...

  • Page 54: Control Panel

    Operation Control panel Designation Meaning/Function Display Menu levels: Home/Information/Settings Basic display Display • If there is no entry for 5 minutes, the display switches off Information on possible operation by means of operating keys • Select, confirm, backwash Navigation bar •...

  • Page 55: Display

    Operation Display Home ► Use the keys to select the menu level Depending on the equipment (with/without pressure sensors) and the settings of the filter, the home screen can display different values. Designation Designation Current value Inlet pressure Backwash via differential pressure is active Current value Outlet pressure Backwash via external signal is active Backwash via time is active...
  • Page 56 Operation In the menu level Information, you can call up the values below: ● Number of backwashes performed in total ● Number of backwashes since maintenance ● Days passed since last maintenance ● Maintenance carried out ● Initial start-up of the filter Date ●...

  • Page 57: Making Settings

    Operation Making settings Faulty operation can lead to dangerous operating states and might cause personal injury. In the tables below, the factory settings are greyed out. Level Parameters Setting range Comments Backwash criterion Δp Backwash Differential pressure evaluation Active • Automatic detection when pressure Inactive sensors are plugged in;...
  • Page 58 Operation Level Parameters Setting range Comments < 0 … 2 … 16 bar Messages/ Message Inlet pressure Prog. output closes if the set value errors (inlet pressure) is undershot • Menu item only appears if pressure 0 = Disabled = Default sensors are connected and activated 0 …...
  • Page 59 Operation Level Parameters Setting range Comments Cancel process? Yes/No To cancel, select Yes Backwash 2/3 Cancel To cancel the process during backwash Backwash active Cancel process? Yes/No To cancel, select Yes Backwash 3/3 Backwash process is terminated Valve closes 180 d … 2 d Backwash interval Select or set the time of the backwash interval...

  • Page 60: Modbus Rtu

    Operation Modbus RTU In addition to digital/binary interfaces, the control unit can be integrated via an RS485 inter- face using Modbus. To establish a connection with the control unit, the host must have the same communica- tion parameters (refer to parameters for Modbus RTU). The filter can be included as a node in an existing bus that has a host.
  • Page 61 Operation 0 … 225 Modbus RTU Address Baud rate 9600/19200/38400 Parity None Even/Odd 0 … 1 … 127 Stop bits 100 … 60,000 ms Timeout In milliseconds Frame size The value of 256 bytes is statically 128/256/512 kB stored and cannot be changed 7.5.2 Function Codes To address the registers of the register sections listed below, the following function codes...
  • Page 62 Operation Register Access Size Data type Designation Unit byte μA 30001 uint16_t Scaled measurement value Pressure sensor 1 μA 30002 uint16_t Scaled measurement value Pressure sensor 2 30003 uint16_t Scaled measurement value See unit of Pressure sensor 1 pressure value Fixed-point value with two decimal places 30004...

  • Page 63: Reading The Water Pressure

    Operation Reading the water pressure You can see on the pressure gauges whether the filter element is dirty. Designation Designation Inlet pressure Outlet pressure 1. Open several water withdrawal points (generate max. flow). 2. Read the inlet and outlet pressure on the pressure gauges. 3.

  • Page 64: Starting A Manual Backwash

    Operation Starting a manual backwash You can start a backwash manually at any time. During the backwash, filtered pure water is still available. 1. Press key combination simultaneously. 2. Start the backwash with the enter key Yes. You can cancel the backwash process with key combination The backwash process takes place in 3 steps: 1.

  • Page 65: Maintenance And Repair

    Maintenance and repair Maintenance and repair Maintenance and repair includes cleaning, inspection and maintenance of the product. The responsibility for inspection and maintenance is subject to local and national require- ments. The owner/operator/operating company is responsible for compliance with the pre- scribed maintenance and repair work.

  • Page 66: Intervals

    Maintenance and repair Intervals By way of regular inspections and maintenance, malfunctions can be detected in time and product failures might be prevented. ► As owner/operator/operating company determine which components must be in- spected and maintained at which intervals (load-dependent). These intervals are subject to the actual conditions such as: water condition, degree of contamination, environmental impacts, consumption, etc.

  • Page 67: Inspection

    Maintenance and repair Inspection You as owner/operator/operating company can carry out the regular inspections yourself. ► Carry out an inspection at least every 2 months. 1. Open several water withdrawal points (generate max. flow). 2. Check the installation for leaks and function. a Pay attention to leaks and puddles on the floor.
  • Page 68 Maintenance and repair 6. Visually check the (optional) safety solenoid valve and the (optional) pressure sensors for damage. ► Perform a manual backwash in case of increasing contamination of the filter ele- ment and/or decreasing water pressure in the pipe network (refer to chapter 7.7). 68 | 104...

  • Page 69: Maintenance

    Maintenance and repair Maintenance Some regular work is necessary to ensure the proper functioning of the product in the long term. DIN EN 806-5 recommends regular maintenance to ensure trouble-free and hygienic operation of the product. Contaminated drinking water due to contamination during maintenance WARNING and repair work ●...
  • Page 70 Maintenance and repair 8.4.2 Annual maintenance The work below must be carried out by a qualified specialist only. ► Carry out the work below in addition to the semi-annual maintenance: ● Check the O-rings for wear and tear (refer to chapter 8.4.2.2) ●...
  • Page 71 Maintenance and repair » The power supply unit remains unplugged. 4. Remove the drain connection. 5. Remove the cable plug of the optional safety solenoid valve. 8.4.2.2 Opening and checking the filter Designation Designation O-ring Thread and O-ring of the pipe nozzle Filter funnel Sieve bottom Filter element...
  • Page 72 Maintenance and repair Designation Designation O-ring inside (Ø 89 mm) Brushes O-ring outside (Ø 98 mm) 6. Remove the filter element. 7. Check the brush/es for wear and tear. 8. Check the filter element for damage and dirt deposits. 9. Check the O-rings of the filter element (outside and inside) for wear and tear. Depending on the filter size, different filter elements are combined.
  • Page 73 Maintenance and repair 8.4.2.3 Closing the filter 1. Fit the O-rings to the filter elements. Slide the filter elements with the larger Ø pointing forward over the suction nozzle into the filter housing. 2. Position the sieve bottom between the pipe nozzle and the lower suction nozzle. 3.
  • Page 74 Maintenance and repair 6. Check the flushing water connection for a tight fit. 7. Mount the drain connection. 8. Mount the cable plug of the optional safety solenoid valve. 8.4.2.4 Putting the filter back into operation 1. Check the tight fit of the filter in the pipe. 2.
  • Page 75 Maintenance and repair 3. Check the optional safety solenoid valve for leaks and integrity. a In case of deposits and impurities, clean the nozzle screw with citric acid. b Check the flushing water connection with the nozzle screw for a tight fit. c Check the connecting cable and the cable plug for a tight fit.

  • Page 76: Spare Parts

    Maintenance and repair Spare parts For an overview of the spare parts, refer to our spare parts catalogue at www.gruenbeck.com. You can order the spare parts from your local Grünbeck representative. As per DIN EN 13433-1, filter elements with pore sizes of 50 μm, 200 μm and 500 μm are not permitted for drinking water systems and can only be used after consultation with Grünbeck (refer to Accessories 3.4).

  • Page 77: Troubleshooting

    Troubleshooting Troubleshooting WARNING Contaminated drinking water due to stagnation ● Infectious diseases ► Have malfunctions remedied immediately. Messages The product displays messages. ● Warning message (orange) ● Malfunction (red) The display of the warning message or malfunction remains active until the condition is rectified.
  • Page 78 Troubleshooting Designation Designation Error memory list Display of stored messages ► Reset the error memory list after the error message has been rectified. 9.1.2 Warnings (orange) Warning Explanation Remedy Check Modbus connection Contact to Modbus RTU ► Check the connection interrupted ►...

  • Page 79: Observations

    Troubleshooting Error Explanation Remedy ► Check the filter element for Error Filter element After 3 consecutive backwash pro- cesses, the differential pressure contamination still exceeds the limit value ► Replace the filter element, • Filter element is dirty if necessary •...

  • Page 80: Manually Closing The Filter's Suction Nozzle

    Troubleshooting Observation Explanation Remedy ► Check O-ring and seals for de- Water loss in the system Defective connections formation or wear and tear ► Check filter housing and filter funnel for damage ► Check connection points (water meter screw connection or flange connection) for damage ►...
  • Page 81 Troubleshooting ► Proceed as follows: 1. Unplug the power supply unit from the socket. 2. Close the shut-off valves upstream and downstream of the filter. 3. Disconnect the connecting lines from the safety solenoid valve and the pressure sensors. 4. Loosen the rear screw of the control cover. 5.
  • Page 82 Troubleshooting 10. Lift the drive unit off the filter housing. 11. Loosen the nut. 12. Remove the cam disc. 13. Use an open-end wrench or screwdriver to turn the pipe nozzle to the left until it reaches the mechanical stop. »...

  • Page 83: Decommissioning

    Decommissioning Decommissioning It is not necessary to take your product out of operation. In case of longer absences, e.g. holidays, precautionary hygiene measures according to VDI 3810-2 and VDI 6023-2 must be taken in order to maintain drinking water hygiene after periods of standstill.

  • Page 84: Dismantling And Disposal

    Dismantling and disposal Dismantling and disposal 11.1 Dismantling The work below must be carried out by a qualified specialist only. 1. Close the shut-off valves upstream and downstream of the filter. 2. Open a water withdrawal point. » The pressure in the pipe network is being relieved. 3.
  • Page 85 Dismantling and disposal 11.2.1 Removal of electronic components Electrical and electronic equipment must be removed in accordance with EU Directive 2012/19/EU and disposed of separately for recycling. If this symbol (crossed-out wheelie bin) is on the product, this product or its electrical and electronic components must not be disposed of as household waste.
  • Page 86 Dismantling and disposal Removing the sensor technology 1. Disconnect the plug-in connections on the filter head. 2. Disconnect the circular connector on the pressure sensors. 3. Remove the pressure sensors. 4. Loosen the 4 screw connections of the safety solenoid valve element. 5.
  • Page 87 Dismantling and disposal 8. Disconnect the plug-in connections of the position sensor technology and the drive unit from the circuit board. 9. Remove the control head. Removing the drive unit 10. Loosen the nuts of the cover. 11. Lift the cover. 12.
  • Page 88 Dismantling and disposal Designation Designation Mechanical components Electronic components 11.2.2 Disposal of electronic components ► Dispose of the removed electronic components separately from your household waste in accordance with national regulations. ► Find out about the local regulations on the separate collection of electrical and electronic products.

  • Page 89: Technical Specifications

    Technical specifications Technical specifications 12.1 Backwash filters MRA25/MRA32 Dimensions and weights MRA25 MRA32 Total height Installation with screw connection length without screw connection Overall height above centre of connection Overall height up to centre of connection ≥ 215 ≥ 215...
  • Page 90 Technical specifications Connection data MRA25 MRA32 Nominal connection diameter DN 25 DN 32 Connection diameter 1" 1¼" Drain connection DN 50 Power supply 100 – 240 Power Rated voltage range supply unit Rated frequency 50/60 Filter Voltage ≤ 2.5 Current input ≤...

  • Page 91: Pressure Loss Curves Of Mra25 (1") And Mra32 (1¼")

    Technical specifications 12.2 Pressure loss curves of MRA25 (1") and MRA32 (1¼") Designation Designation Pressure loss in bar Flow rate in m 91 | 104...

  • Page 92: Backwash Filters Mra40/Mra50

    Technical specifications 12.3 Backwash filters MRA40/MRA50 Dimensions and weights MRA40 MRA50 Total height Installation length with screw connection without screw connection Overall height above centre of connection Overall height up to centre of connection ≥ 215 ≥ 215 Clearance required for the replacement of the fil- ter element ≥...
  • Page 93 Technical specifications Connection data MRA40 MRA50 Nominal connection diameter DN 40 DN 50 Connection diameter 1½" 2" Drain connection DN 50 Power supply 100 – 240 Power Rated voltage range supply unit Rated frequency 50/60 Filter Voltage ≤ 2.5 Current input ≤...

  • Page 94: Pressure Loss Curves Of Mra40 (1½") And Mra50 (2")

    Technical specifications 12.4 Pressure loss curves of MRA40 (1½") and MRA50 (2") Designation Designation Pressure loss in bar Flow rate in m 94 | 104...

  • Page 95: Backwash Filters Mra65/Mra80/Mra100

    Technical specifications 12.5 Backwash filters MRA65/MRA80/MRA100 Dimensions and weights MRA65 MRA80 MRA100 Total height Installation length without counterflanges; flanges PN 16 acc. to DIN EN 1092-1 Overall height above centre of connection Overall height up to centre of connection ≥ 215 ≥...
  • Page 96 Technical specifications Connection data MRA65 MRA80 MRA100 Nominal connection diameter DN 65 DN 80 DN 100 Drain connection DN 50 Power supply 100 – 240 Power Rated voltage range supply unit Rated frequency 50/60 Filter Voltage ≤ 2.5 Current input ≤...

  • Page 97: Pressure Loss Curves Mra65/Mra80/Mra100

    Technical specifications 12.6 Pressure loss curves MRA65/MRA80/MRA100 Designation Designation Pressure loss in bar Flow rate in m 97 | 104...

  • Page 98: Accessories

    Technical specifications 12.7 Accessories MRA25/MRA32/MRA40/MRA50 MRA65/MRA80/MRA100 Designation Designation Pressure sensors Safety solenoid valve 98 | 104...
  • Page 99 Technical specifications Technical specifications Pressure sensors Threaded connection G1/8 0 – 16 Pressure range Electrical connection Circular connector M12 (female connector, A coding) 4 – 20 Output signal Precision +/- 0.5 % MSP Protection IP67 Connecting line M12, 3-pin (female connector, A coding) for M8 (plug, A coding) Order no.

  • Page 100: Operation Log

    Operation log Operation log ► Document the initial start-up and all maintenance activities. ► Copy the maintenance report. Backwash filter MRA ______________ Serial no.: ______________________ 13.1 Start-up/commissioning log Customer Name Address Installation/Accessories Drain connection acc. to DIN EN 1717 Floor drain available Safety device Operating values Water pressure at raw water inlet...

  • Page 101: Maintenance

    Operation log 13.2 Maintenance Date Work performed Signature 101 | 104...
  • Page 102 EU guidelines in terms of its design, construction and execution. This certificate becomes void if the system is modified in any way not approved by us. Backwash filter MRA25 – MRA100 Serial no.: Refer to type plate The aforementioned system also complies with the following directives and provisions: •...
  • Page 103 Publisher's information Technical documentation Should you have any questions or suggestions regarding this operation manual, please contact Grünbeck Wasseraufberei- tung GmbH’s Department for Technical Documentation di- rectly. Email: dokumentation@gruenbeck.de...
  • Page 104 Grünbeck Wasseraufbereitung GmbH Josef-Grünbeck-Str. 1 89420 Hoechstaedt/Germany +49 9074 41-0 +49 9074 41-100 info@gruenbeck.com For more information www.gruenbeck.com go to www.gruenbeck.com...

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Mra100

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