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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 Central Contact Germany Sales Phone +49 9074 41-0 Service Phone +49 (0)9074 41-333 service@gruenbeck.de Availability Monday to Thursday 7:00 am - 6:00 pm Friday 7:00 am – 4:00 pm Subject to technical modifications. © by Grünbeck Wasseraufbereitung GmbH Original operation manual Edition: January 2024 Order no.: 100232920000_en_024...

  • Page 3: Table Of Contents

    Requirements for the installation site ....... 25 Checking the scope of supply ........26 12.1 Backwash filters MRA25/MRA32 ......88 Water installation ............. 27 12.2 Pressure loss curves of MRA25 (1") and MRA32 Electrical installation ..........35 (1¼") .................90 12.3 Backwash filters MRA40/MRA50 ......91 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 following products: ● 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 Observe the Operation Manual Maximum water temperature Date of manufacture Water temperature in the drinking water sector DVGW test mark Nominal pressure CE mark Nominal flow Disposal information...

  • Page 6: Symbols Used

    Introduction Symbols used Symbol Meaning Danger and risk Important information or prerequisite 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 is only allowed to be carried out by technical service personnel Depiction of warnings This manual contains information with which you must comply for your own personal safety.

  • 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 Prerequisites • No special expertise Operator/user • Knowledge of the tasks assigned •...

  • Page 8: 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 9 Safety 2.1.3 Electrical dangers There is an immediate danger of fatal injury from electric shock when touching live compo- nents. Damage to the insulation or individual components can be life-threatening. ● Only have a qualified electrician carry out electrical work on the system. ●...

  • Page 10: 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 11: 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 from the product. 2. De-energise the product. a Unplug the power supply unit from the socket. 3. Locate the leak. 4.

  • Page 12: 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 13 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 Outlet pressure gauge Taiwan adapter (type A/B), optional Brush Power supply unit Sieve bottom Control unit with display Suction nozzle (valve) Water meter screw connection...
  • Page 14 Product description Designation Designation Filter funnel Flushing water connection with free outlet Flat seal Nozzle screw Double socket 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 (external sig- Connection cable of power supply unit, 2 m in...

  • Page 15: 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 > 100 µm in size 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 16 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 16 | 104...
  • Page 17 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 18 Product description 3.3.2 Parallel operation of two filters (cascade) Parallel piping and cascade function Parallel piping for various sizes and materials (refer to chapter Accessories 3.4). Via the DI1 input and the DO1 output, two control units/filters can be operated in combina- tion.

  • Page 19: Accessories

    Product description Accessories Your product can be retrofitted 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 coun- try. 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 20 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 21: Transport And Storage

    Transport and storage Transport and storage Dispatch/delivery/packaging The product is packed in a cardboard box at the factory and secured with a foam bag. ► Check immediately upon receipt for completeness and transport damage. ► In case of visible transport damage, proceed as follows: •...

  • Page 22: 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 23 Installation Installation example: Backwash filter with optional accessories Designation Designation Inlet shut-off valve Outlet shut-off valve Socket Safety solenoid valve (optional) Inlet and outlet pressure sensors (optional) Drain connection provided by the client on site Optional equipment ► When installing an optional safety solenoid valve and/or pressure sensors, take into consideration the space required for installation, maintenance and operation (refer to chapter 5.4.5).
  • Page 24 Installation Installation example: Backwash filter with flange connections Designation Designation Inlet shut-off valve Drain connection provided by the client on site Outlet shut-off valve Optional adapter kit Socket 24 | 104...

  • Page 25: 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 26: 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 Nozzle screw...

  • Page 27: 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 28 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 29 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 30 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 Pay attention to the marking of the flow direction on the filter.
  • Page 31 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 chap- ter 12.5).
  • Page 32 Installation 2. Position the filter in the pipe. a Pay attention to the marking of the flow direction on the filter. 3. Tighten the filter at the flange screw connections without applying tension. a If necessary, install an (optional) adapter kit to ensure the function of the butter- fly valves.
  • Page 33 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 34 Installation 5.3.4.2 Installing the drain connection and the waste water pipe Designation Designation Waste water pipe to be provided by the client Drain connection DN 50 on site on site ► Install a drain connection (not included in the scope of supply). ►...

  • Page 35: 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 36 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 37 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 38 Installation Dismantling 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 39 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 9. Set the switch S1 to ON (refer to chapter 5.4.4). 10.
  • Page 40 Installation 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/fault message Output contact Output 2 Inactive/backwash active/cascade/warning/fault message Fault signal, Normally closed con- tact/normally open contact...
  • Page 41 Installation X1 (J5) Power supply/communication DIGIN1 2 DIG IN1 2: +24 V= Input DIG IN1 1: GND DIGIN1 1 PWR (power) +24V 60 W Feed from power supply unit X2 (J2) Periphery (sensors and actuators) Connectors for pressure sensors and safety solenoid valve X3 (J1) Drive unit Connectors for drive unit (motor and gearing) X4 (J8) Position sensor technology...
  • Page 42 Installation ► Check whether the required minimum distance for the installation of the pressure sensors is available on the back of the filter. If space is limited, the pressure sensors can be mounted on the front of the filter instead of the pressure gauges.
  • Page 43 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 44 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 45 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 46 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 47: Start-Up

    Start-up Start-up The initial start-up of the product must be carried out by a qualified specialist only. How to start up the product 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 48 Start-up 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 49: Checking The Product

    Start-up » The backwash process takes place in 3 steps: 1st Open valve, 2. Backwash, 3. Close valve. n Set the backwash interval to 2 d … 180 d/1 h … 47 h. o Set the required Differential pressure (only for version with pressure sensors, preset to 0.4 bar).

  • Page 50: Setting The Month Indicator

    Start-up 1. Open the shut-off valves. 2. Open the nearest water withdrawal point after the filter as far as it will go. a Apply the maximum operating pressure. » The filter is vented. 3. Check the filter for leaks. 4. Perform a manual backwash (refer to chapter 7.7). a Check that the water is properly flushed to the drain.

  • Page 51: Handing Over The Product To The Owner/Operating Company

    Start-up Handing over the product to the owner/operating company ► Explain to the owner/operating company how the product works. ► Use the manual to brief the owner/operating company and answer any questions. ► Inform the owner/operating company about the need for inspections and mainte- nance.

  • Page 52: Operation/Handling

    Operation/handling Operation/handling 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 53: Operating Panel

    Operation/handling Operating 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 54: Display

    Operation/handling 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 55 Operation/handling 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 56: Making Settings

    Operation/handling 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 Δ-p Backwash Differential pressure evaluation Active •...
  • Page 57 Operation/handling Level Parameters Setting range Comments 0 … 3 Signal A message appears if the differential pressure cannot undershoot the limit Backwash attempts value within the set number of back- wash attempts. • Filter element is too dirty • Differential pressure signal is per- manently pending Error memory Message Maintenance...
  • Page 58 Operation/handling Level Parameters Setting range Comments Backwash 3/3 The backwash process is terminated Valve closes 2 d … 180 d Backwash interval Select or set the time of the backwash interval 1 h … 47 h 0.2 … 0.4 … 3.0 bar Differential pressure Set to release the backwash process (with connected pressure sensors...

  • Page 59: Modbus Rtu

    Operation/handling Modbus RTU In addition to digital/binary interfaces, the control unit can be integrated via an RS485 inter- face using Modbus. In order to establish a connection with the control unit, the host must have the same com- munication parameters (refer to parameters for Modbus RTU). The filter can be included as a node in an existing bus that has a host.
  • Page 60 Operation/handling ► Check the set parameters in the control unit. 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 7.5.1...
  • Page 61 Operation/handling Register Access Size Data type Designation Unit byte μA 30001 uint16_t Measured value pressure sensor 1 μA 30002 uint16_t Measured value pressure sensor 2 30003 uint16_t Scaled measured value pressure sensor refer to pres- sure value unit Fixed-point value with two decimal places 30004 uint16_t...

  • Page 62: Reading The Water Pressure

    Operation/handling 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 rate). 2. Read the inlet and outlet pressure on the pressure gauges. 3.

  • Page 63: Starting A Manual Backwash

    Operation/handling 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 64: 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/operating company is responsible for compliance with the prescribed maintenance and repair work.

  • Page 65: 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 the owner/operating company, determine which components have to be in- spected and maintained at which intervals (load-dependent). These intervals are subject to the actual conditions, e.g.: Water condition, degree of impurities, envi- ronmental influences, consumption, etc.

  • Page 66: Inspection

    Maintenance and repair Inspection You, as owner/operating company, can carry out the regular inspections yourself. ► Conduct an inspection at least every 2 months. 1. Open several water withdrawal points (generate max. flow rate). 2. Check the installation for leaks and function. a Pay attention to leaks and puddles on the floor.
  • Page 67 Maintenance and repair 6. Visually check the (optional) safety solenoid valve and the (optional) pressure sen- sors 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). 67 | 104...

  • Page 68: 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 69 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 70 Maintenance and repair » The power supply unit remains unplugged. 4. Remove the drain connection. 5. Remove the connector socket 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 71 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 72 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 73 Maintenance and repair 6. Check the tight fit of the flushing water connection and the double socket. a Clean the nozzle screw with citric acid if there are deposits and impurities. 7. Mount the drain connection. 8. Remove the connector socket of the optional safety solenoid valve. 8.4.2.4 Putting the filter back into operation 1.
  • Page 74 Maintenance and repair 2. Open the shut-off valves on the inlet and the outlet. 3. Check the optional safety solenoid valve for leaks and integrity. a Clean the nozzle screw with citric acid if there are deposits and impurities. b Check the tight fit of the flushing water connection to the nozzle screw. c Check the connecting cable and the connector socket for a tight fit.

  • Page 75: 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 obtain 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 76: Fault

    Fault Fault WARNING Contaminated drinking water due to stagnation ● Infectious diseases ► Have malfunctions eliminated immediately. Signals The product displays messages. ● Warning message (orange) ● Malfunction (red) The display of the warning message or fault remains active until the condition is rectified. Designation Designation Current message...
  • Page 77 Fault Designation Designation Error memory list Display of the 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 inter- ► Check the connection rupted ►...

  • Page 78: Observations

    Fault Fault 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, if • Filter element is dirty necessary •...

  • Page 79: Manually Closing The Filter's Suction Nozzle

    Fault 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 80 Fault 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 81 Fault 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 82: 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 af- ter downtimes.

  • Page 83: Dismantling And Disposal

    Dismantling and disposal Dismantling and disposal 11.1 Dismantling The following work must be carried out by qualified specialists 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 84 Dismantling and disposal 11.2.2 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 85 Dismantling and disposal Removing the sensor technology 1. Loosen the plug-in connections on the filter head. 2. Loosen 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 86 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 87 Dismantling and disposal Designation Designation Mechanical components Electronic components 11.2.3 Disposal of electronic components ► Dispose of the removed electronic components according to the national regula- tions separately from your household waste. ► Find out about local regulations on the separate collection of electrical and elec- tronic products.

  • Page 88: 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 89 Technical specifications Connection data MRA25 MRA32 Nominal connection diameter DN 25 DN 32 1¼” Connection diameter 1" Drain connection DN 50 Mains connection 100 – 240 Power supply unit Rated voltage range Rated frequency 50/60 Filter Voltage ≤ 2.5 Current input ≤...

  • Page 90: 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 90 | 104...

  • Page 91: Backwash Filters Mra40/Mra50

    Technical specifications 12.3 Backwash filters MRA40/MRA50 Dimensions and weights MRA40 MRA50 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 Clearance required for the replacement of the filter element ≥...
  • Page 92 Technical specifications Connection data MRA40 MRA50 Nominal connection diameter DN 40 DN 50 Connection diameter 1½" 2" Drain connection DN 50 Mains connection 100 – 240 Power supply Rated voltage range unit Rated frequency 50/60 Filter Voltage ≤ 2.5 Current input ≤...

  • Page 93: 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 93 | 104...

  • Page 94: 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 counter- flanges; flanges PN 16 acc. to DIN EN 1092-1 Overall height above centre of connec- tion Overall height up to centre of connec- tion ≥...
  • Page 95 Technical specifications Connection data MRA65 MRA80 MRA100 Nominal connection diameter DN 65 DN 80 DN 100 Drain connection DN 50 Mains connection 100 – 240 Power supply Rated voltage range unit Rated frequency 50/60 Filter Voltage ≤ 2.5 Current input ≤...

  • Page 96: Pressure Loss Curves Of Mra65/Mra80/Mra100

    Technical specifications 12.6 Pressure loss curves of MRA65/MRA80/MRA100 Designation Designation Pressure loss in bar Flow rate in m 96 | 104...

  • Page 97: Accessories

    Technical specifications 12.7 Accessories MRA25/MRA32/MRA40/MRA50 MRA65/MRA80/MRA100 Designation Designation Pressure sensors Safety solenoid valve 97 | 104...
  • Page 98 Technical specifications Technical specifications Pressure sensors Threaded connection G1/8 0 – 16 Pressure range Electrical connection Circular connector M12 (female connector, A cod- ing) 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 99: 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 log Customer Name Address Installation/accessories Drain connection acc. to DIN EN 1717 Floor drain present Safety device Operating values Water pressure raw water inlet...

  • Page 100: Maintenance

    Operation log 13.2 Maintenance Date Work performed Signature 100 | 104...
  • Page 101 Operation log Date Work performed Signature 101 | 104...
  • Page 102 EU guidelines in terms of its design, construction and execution. This certificate will become invalid if the system is modified in a 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 If you have any questions or suggestions regarding this operation manual, please contact the Technical Documentation Department at Grünbeck Wasserauf- bereitung GmbH 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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Mra100Mra32Mra40Mra50Mra65Mra80

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