Grunbeck MR25 User manual

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Backwash filter | MR25 –MR100
Operation manual

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Phone [phone]
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We reserve the right to technical modifications.
© by Grünbeck Wasseraufbereitung GmbH
Original operation manual
Edition: January 2023
Order no.: 100204170000_en_004

Table of contents
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Table of contents
Table of contents.............................................................. 3
1Introduction ............................................................. 4
1.1 Validity of the manual ............................................... 4
1.2 Product identification ................................................ 4
1.3 Symbols used........................................................... 6
1.4 Depiction of warnings ............................................... 6
1.5 Demands on personnel ............................................ 6
2Safety ....................................................................... 8
2.1 Safety measures ...................................................... 8
2.2 Product-specific safety instructions ........................... 9
2.3 Conduct in emergencies ......................................... 10
3Product description............................................... 11
3.1 Intended use .......................................................... 11
3.2 Product components .............................................. 12
3.3 Functional description............................................. 13
3.4 Accessories............................................................ 14
4Transport and storage........................................... 15
4.1 Shipping/Delivery/Packaging .................................. 15
4.2 Transport to/at the installation site .......................... 15
4.3 Storage .................................................................. 15
5Installation ............................................................. 16
5.2 Requirements for the installation site ...................... 17
5.3 Checking the scope of supply ................................. 18
5.4 Water installation.................................................... 19
6Start-up/commissioning........................................ 26
6.1 Closing the drain outlet........................................... 26
6.2 Checking the product.............................................. 27
6.3 Setting the month indicator ..................................... 28
6.4 Handing over the product to the
owner/operator/operating company ........................ 28
7Operation................................................................29
7.1 Installing Grünbeck’s myProduct app ......................29
7.2 Reading the water pressure ....................................30
7.3 Backwashing the filter .............................................31
8Maintenance and repair .........................................32
8.1 Cleaning .................................................................32
8.2 Intervals..................................................................32
8.3 Inspection ...............................................................33
8.4 Maintenance ...........................................................34
8.5 Spare parts .............................................................39
8.6 Wearing parts .........................................................39
9Troubleshooting.....................................................40
9.1 Observations ..........................................................40
10 Decommissioning ..................................................42
10.1 Temporary standstill................................................42
11 Dismantling and disposal ......................................43
11.1 Dismantling.............................................................43
11.2 Disposal..................................................................43
12 Technical specifications ........................................45
12.1 Backwash filter MR25/MR32 ...................................45
12.2 Pressure loss curves of MR25 (1") and MR32
(1¼") ......................................................................46
12.3 Backwash filter MR40/MR50 ...................................47
12.4 Pressure loss curves of MR40 (1½") and MR50
(2") .........................................................................48
12.5 Backwash filters MR65/MR80/MR100 .....................49
12.6 Pressure loss curves of MR65/MR80/MR100 ..........50
13 Operation log .........................................................51
13.1 Start-up/commissioning log .....................................51
13.2 Maintenance ...........................................................52

Introduction
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1 Introduction
This manual is intended for owners/operators/operating companies, users as well as quali-
fied specialists and ensures the safe and efficient handling of the product. The manual is an
integral part of the product.
●Carefully read this manual and the included manuals on the components before
you operate your product.
●Obey all safety and handling instructions.
●Keep this manual and all other applicable documents, so that they are available
when needed.
Illustrations in this manual are for basic understanding and can differ from the actual design.
1.1 Validity of the manual
This manual applies to the products below:
●Backwash filter MR25
●Backwash filter MR32
●Backwash filter MR40
●Backwash filter MR50
●Backwash filter MR65
●Backwash filter MR80
●Backwash filter MR100
1.2 Product identification
You can identify your product based on the product designation and the order no. indicated
on the type plate.
►Check whether the products given in chapter 1.1 correspond to your product.

Introduction
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The type plate is located on the front and the rear of the filter housing.
Designation
1
Obey the operation manual
2
EAC mark
3
Nominal connection diameter
4
Nominal flow
5
Nominal pressure
6
Water temperature in the drinking water sector
7
Maximum water temperature
Designation
8
Max./min. pore size
9
Product designation
10
Data matrix code
11
Order no.
12
Serial no.
13
QR code

Introduction
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1.3 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 technical service personnel only
1.4 Depiction of warnings
This manual contains information and instructions that you must obey for your personal
safety. The information and instructions are highlighted by a warning symbol and are struc-
tured as shown below:
1.4.1.1
1.4.1.2 SIGNAL WORD
1.4.1.3 Type and source of hazard
1.4.1.4
●Possible consequences
►Preventive measures
The signal words below are defined subject to the degree of danger and might be used in the
present document:
Warning symbol and
signal word
Consequences if the information/instructions are ignored
DANGER
Personal
injury
Death or serious injuries
WARNING
Possible death or serious injuries
CAUTION
Possible moderate or minor injuries
NOTE
Damage to
property
Possible damage to components, the product and/or its functions
or an object in its vicinity
1.5 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.

Introduction
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1.5.1 Qualification of personnel
Personnel
Requirements
User
•No special expertise required
•Knowledge of the tasks assigned
•Knowledge of possible dangers in case of incorrect behaviour
•Knowledge of necessary protective equipment and protective measures
•Knowledge of residual risks
Owner/operator/
operating company
•Product-specific expertise
•Knowledge of statutory regulations on work safety and accident prevention
Qualified specialist
•Electrical engineering
•Sanitary engineering
(HVAC and plumbing)
•Transport
•Professional training
•Knowledge of relevant standards and regulations
•Knowledge of detection and prevention of potential hazards
•Knowledge of statutory regulations on accident prevention
Technical service
(Grünbeck's technical service/
authorised service company)
•Extended product-specific expertise
•Trained by Grünbeck
1.5.2 Authorisations of personnel
The table below describes which tasks may be carried out by whom.
User
Owner/
operator/
operating
company
Qualified
specialist
Technical
service
Transport and storage
X
X
X
Installation and mounting
X
X
Start-up/commissioning
X
X
Operation and handling
X
X
X
X
Cleaning
X
X
X
X
Inspection
X
X
X
X
Maintenance
semi-annually
X
X
X
X
annually
X
X
Troubleshooting
X
X
X
Repair
X
X
Decommissioning and
restart/recommissioning
X
X
Dismantling and disposal
X
X
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

Safety
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2 Safety
2.1 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.
●Keep the premises locked against unauthorised access to protect imperilled or un-
trained persons from residual risks.
●Comply with the maintenance intervals (refer to chapter 8.2). Failure to comply can
result in the microbiological contamination of your drinking water system.
●Be aware of a possible risk of slipping due to leaking water on the floor.
2.1.1 Mechanical hazards
●You must never remove, bridge, or otherwise tamper with safety equipment.
●For all work on the product that cannot be carried out from the ground, use stable,
safe and self-standing access aids (e.g. stepladders).
●Make sure that the product is properly secured and that the stability of the product
is guaranteed at all times.
●Potential risk of pinching and cuts on threaded connections. Use protective gloves
when connecting the product and during maintenance work.
2.1.2 Pressure-related hazards
●Components can be under pressure. There is a risk of injuries and damage to
property due to escaping water and unexpected movement of components. Check
the pressure lines and the product for leaks at regular intervals.
●Before starting any repair and maintenance work, make sure that all affected com-
ponents are depressurised.

Safety
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2.1.3 Groups of persons requiring protection
●Children should be supervised to make sure that they do not play with the product.
●This product must not be used by persons (including children) with limited abilities,
lack of experience or knowledge. Unless they are supervised, have been instructed
on the safe use of the product and understand the resulting hazards.
●Cleaning and maintenance must not be carried out by children.
2.2 Product-specific safety instructions
WARNING
Excessive contamination of the filter element
●Health risk due to contamination of the drinking water.
►Comply with the intervals and recommendations for inspection and maintenance
of the filter.
When using the product in hot water filtration, e.g. for heating water:
WARNING
Hot water and hot surfaces
●Burns due to hot surfaces on components at temperatures of more than 55 °C.
●Scalding due to escaping hot water, e.g. during backwash.
►For hot water filtration, install a fixed waste water pipe at the flushing water con-
nection of filter.
►Use suitable protective gloves when working on the product.
Labels on the product
Hot surfaces/medium
In case of hot water filtration make sure that the product is labelled for risk of hot water.
The affixed information and pictograms must be clearly legible.
They must not be removed, soiled or painted over.
►Obey all warnings and safety instructions.
►Immediately replace illegible or damaged symbols and pictograms.

Safety
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2.3 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 filter.
2. Locate the leak.
3. Eliminate the cause of the water leak.

Product description
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3 Product description
3.1 Intended use
●The MR 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).
●The filters protect the water pipes and connected water-carrying system parts from
malfunctions and corrosion damage due to undissolved impurities (particles) such
as rust particles, sand, etc.
●The filters are designed according to the stipulations of DIN EN 13443-1 as well as
DIN 19628 and are intended for installation into drinking water system according to
DIN EN 806-2 (installation immediately downstream of the water meter).
3.1.1 Application limits
●Water temperature ≤ 90 °C
●Water temperature ≤ 30 °C when used in the drinking water sector (DVGW)
●Pressure range ≤ 16 bar
●Pressure range ≤ 10 bar in case of a media temperature of 90 °C
3.1.2 Foreseeable misuse
The filters cannot be used in the areas below:
●In the negative pressure range.
●For circulation water that has been treated with chemicals.
●For oils, greases, solvents, soaps and other lubricating media and neither for the
separation of water-soluble substances.
●For installation in vertical water pipes.

Product description
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3.2 Product components
Designation
1
Water meter screw connection
2
Seal
3
Filter housing
4
Backwash handwheel
5
Pressure gauge for inlet pressure
6
Pressure gauge for outlet pressure
7
Brush
8
Sieve bottom
Designation
9
Suction nozzle
10
Filter element
11
O-ring for filter element
12
O-ring for filter funnel
13
Filter funnel
14
Flange connection
15
Flushing water connection with free outlet
16
Locknut

Product description
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3.3 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.
Due to the growing contamination of the filter element, the differential pressure between the
raw water inlet and the pure water outlet increases.
The differential pressure can be read on the pressure gauges.
The drain is opened by turning the handwheel to the right as far as it will go, and a backwash
is carried out. When the backwash handwheel is turned, the brush turns with the backwash
handwheel and sweeps over the filter surface of the filter element. The filter element is
cleaned. The impurities are removed by the brush and the suction nozzle sucks them into
the drain outlet.
The drain outlet is closed by turning the backwash handwheel to the left as far as it will go,
and the backwash process is terminated.

Product description
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3.4 Accessories
You can retrofit your product with accessories. Please contact your local Grünbeck repre-
sentative or Grünbeck’s headquarters in Hoechstaedt/Germany for details.
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 may only be used after consultation with
Grünbeck.
Designation
Order no.
1" / 1¼"
1½" / 2" / DN 65
DN 80 / DN 100
50 µm filter element
107 052
107 053
107 054
200 µm filter element
107 072
107 073
107 074
500 µm filter element
107 082
107 083
107 084
Illustration
Product
Order no.
Drain connection DN 50
188 875
For professional installation according to DIN EN 1717 with integrated si-
phon to discharge the backwash water to the drain.
Adapter kit
As spacer flange, to ensure the function of the butterfly valves directly
mounted on the filter.
Scope of supply:
2 Flanges, 4 seals, 16 screws M16x120 mm with washers and nuts
For DN 80 with flange connection
106 804e
For DN 100 with flange connection
106 805e

Transport and storage
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4 Transport and storage
4.1 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:
•Do not accept the delivery or only accept it under reserve.
•Record the extent of damage on the transport documents or on the delivery
note of the carrier.
•Initiate a complaint.
4.2 Transport to/at the installation site
►Transport the product in its original packaging only.
CAUTION
Unhandy size of the product during transport
●Crushing due to the product falling down.
►Transport or lift the product with two people.
►Use personal protective equipment (refer to chapter 1.5.3).
4.3 Storage
►Protect the product from the impacts below when storing it:
•Dampness, moisture
•Environmental impacts such as wind, rain, snow, etc.
•Frost, direct sunlight, severe heat exposure
•Chemicals, dyes, solvents and their vapours

Installation
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5 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.
Installation example: Backwash filter with screw connections
Designation
1
Inlet shut-off valve
2
Outlet shut-off valve
Designation
3
Piping provided by the client on site
4
Drain connection DN 50 acc. to DIN EN 1717

Installation
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Installation example: Backwash filter with flange connections
Designation
1
Inlet shut-off valve
2
Outlet shut-off valve
3
Piping provided by the client on site
Designation
4
Drain connection DN 50 acc. to DIN EN 1717
5
Optional adapter kit
5.2 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
•≤ 25 °C for applications in the drinking water sector
•≤ 40 °C for purely technical applications
●Protection from heat sources in the drinking water sector (e.g. heating systems,
boilers and warm water pipes)
●Access for maintenance work (take note of space required)
●Sufficiently illuminated as well as aerated and ventilated

Installation
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Space required
●Clearance above the filter head for operation ≥ 80 mm
●Clearance for removal of the filter element downwards (refer to chapter 12)
●Clearance at the front for operation ≥500 mm
Water installation
●Floor drain or corresponding safety device with water stop function
●Drain connection ≥ DN 50
●Shut-off valves upstream and downstream of the product
5.3 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
1
Water meter screw connections
2
Seals
3
Filter with screw connections
4
Flushing water connection
5
Locknut
Designation
6
Operation manual
7
Adhesive label “Hot surfaces” for hot water fil-
tration
8
Filter with flange connections
►Check the scope of supply for completeness and damage.

Installation
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5.4 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
●Burns due to hot surfaces on components at temperatures of more than 55 °C.
●Scalding due to escaping hot water, e.g. during backwash.
►Use suitable protective gloves when working on the product.
►Provide protection from hot surfaces in case of hot water filtration
►Visibly attach the warning label “Hot surfaces” on the filter housing
(refer to chapter 2.2).
5.4.1 Changing the direction of flow
Designation
1
Flow from left to right
Designation
2
Flow from right to left
►Check the flow direction given on site.

Installation
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►Refit the filter’s pressure gauges, if necessary:
Designation
1
Closing plugs
Designation
2
Pressure gauges for inlet pressure and outlet
pressure
1. Unscrew the closing plugs with O-ring and the pressure gauges.
2. Rotate the filter by 180°.
3. Install the closing plugs with O-ring and the pressure gauges.
» The filter has been modified for flow direction from right to left.
» The pressure gauges face forwards when the filter is installed.