Magnetic NF 2 plus User manual

magnetic Demineralization
Rell station (NF plus)
Instructions for use
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magnetic GmbH & Co. KG
Am Richtbach 5
D-74547 Untermünkheim
Tel. [phone]
Fax [phone]
[e-mail]
www.magnetic-online.de
Managing Shareholder:
Michael Bader
VAT ID No.: DE 255 018 730
Commercial Register No.: HRA 571362
Register Court: Stuttgart
Version: NF_ENG_08.2020

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magnetic Demineralization
Rell station (NF plus)
Contents
The function .................................................................................................4
Use with heating system filling hose ...........................................................4
Permanent connection.................................................................................5
Operating the meausuring computer ..........................................................6
Replacing the mixed bed resin ...................................................................7
Calculating the capacity ..............................................................................8
Troubleshooting ...........................................................................................9
Technical data............................................................................................10
Maintenance ..............................................................................................11

4
Safety note
The magnetic®NF plus should be flushed with about 10 litres of water before each use to get rid of the first amount of
water flow through the device. A permanent connection with a heating system filling hose is not permitted. Unsupervised
use is not permitted.
The fresh water tap, the shut-off valves on the magnetic®NF plus and the boiler shut-off valve must always be closed and
the filling hose must always be removed after each use.
The mixed bed resin in the container must not get into the heating system. A fine-meshed strainer is integrated into the
outlet for safety reasons – it must not be removed.
1. Flushing the tank 2. Refill the heating system
3. Close tap/valves, remove hoses
The function
The magnetic®NF plus removes limescale and aggressive water constituents, like sulphates, nitrates and chlorides, from the
filling water. The device works on the basis of a mixed-bed-resin ion exchanger and delivers demineralised water quality for
every heating system size. This method does not add any chemicals to the water. The device works without external electrici-
ty connection.
Use with heating system filling hose
The magnetic®NF plus device must be pre-flushed with fresh drinking water if it is occasionally used for topping-up the heating
system with a hose in order to get rid of the first amount of water flow through the device. That is done by checking the demi-
neralisation with the integrated measuring computer. The filling hose must be vented before the subsequent filling process, i.e.
filled with water to prevent any air from the filling tap getting into the heating system.
!

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Permanent connection
The magnetic®NF plus is pressure-tested up to 6 bar and is therefore also suitable for a permanent connection between the
untreated water supply and the heating system.
A permanent connection can be subject to technical requirements depending on national or local regulations and such re-
quirements must be complied with. A system isolator must be additionally installed in front of the filling station if the place of
installation is subject to DIN EN 1717 (Germany).
NF 2 plus, 6 plus
NF 12 plus
NF 25 plus
Untreated water
backow preventer
Keep taps/valves closed
when not in use
Untreated water
Untreated water
backow preventer
backow preventer
Keep taps/valves closed
when not in use
Keep taps/valves closed
when not in use
The regulations of the water supply
utility must be observed for a permanent
connection to the drinking water network
(e.g. system isolator as per DIN EN 1717).
The taps/valves on the heating system
and drinking water network must be
closed after use.
Safety notes
!

6
Operating the measuring computer
The combined meter is battery-powered. It measures the flow rate in l/min, the total flow in litres and the content
of dissolved minerals, either in μS/cm (microsiemens/cm) or TDS. It is also possible to set a limit for the
maximum still tolerated mineral content in the demineralised water (outlet of the filling station). The limit value
and the total quantity value can be reset.
Switching the conductivity value to TDS / Manual measurement of the conductivity
The factory setting of the measuring computer is electrical conductivity displayed in “μs/cm”. To switch the measurement to
TDS in „ppm“, briefly press the power button. The measuring computer now shows „ppm“ (instead of „μS/cm“).
Press the “A” key to display the current conductivity value (μs/cm). The maximum settable conductivity value is 1999 μs/cm.
Automatic monitoring of the conductivity / Set limit
Press the “S” key to set the limit value for the conductivity in the display. The increase step is 15 μs/cm. A longer pressing of
the “S” key resets the value back to zero.
Switch to automatic mode after you have set a limit value. Do that by pressing the “A” key to first do a manual test. Then
press the “A” key again to switch to the automatic mode. “Auto” will then be shown in the display.
The conductivity will then be measured again every 20 litres. The LED on the left above the display blinks green for 30 se-
conds if the measured value is below the previously set limit value. The LED will start to blink red and an alarm tone will be
emitted if the measured value exceeds the set limit value.
Switching between automatic and manual monitoring
Press the “A” key to switch from automatic to manual mode and thus reset the last measured value of the automatic monito-
ring.
set
limit
hold for
3 seconds to
switch on /off
automatic /
manual
measurement
hold for
3 seconds to
reset the total liter

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Replacing the mixed bed resin: NF 2 plus, 6 plus
1. Close the ball valves, screw off
the tank
2. Dispose of used resin
with domestic waste, rell
with new resin
3. Screw on the tank, re-
set measuring computer,
see instructions for use
Replacing the mixed bed resin: NF 12 plus, 25 plus
«0»
«0»
1. Close all valves, remove safety strainer on the
drain tap
2. Connect a hose to the drain tap, with the other
hose end in the supplied water permeable collec-
tion bag
3. Connect the inlet to a drinking water tap with
a hose
4. Open the inlet tap and the drain tap and ush
out the resin until clear water comes out - the resin
is then completly emptied.
5. Close the inlet tap and open the vent tap
on the lid. Air can now get into the device and
water in the lling station can ow out of the
drain tap.
6. Used mixed bed resin can be disposed of
with the normal household waste.
7. Close the drain tap, remove the hose and
reinstall the safety strainer.
8. Rell with new resin.
9. Then vent the device again.
10. Put on the lid, connect the hoses and reset the
measuring computer.

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The capacity (range) of the mixed bed resin depends on the water hardness. It can be read from the diagram below or calcu-
lated with the capacity number of the amount of resin.
The conversion from μS/cm to water hardness gives only an approximate value and is only possible for un-
treated drinking water. Other water types contain not only limescale (calcium carbonate) but also other dissolved
minerals. The capacity would then be less because the filling station removes all minerals.
!
0
500
1000
1500
2000
2500
3000
1 2 4 6 8 10 12 14 16 18 20 22 24 26 28
CAPACITY IN LITER
TOTAL HARDNESS IN °DH
CAPACITY REFILL STATION (NF plus)
NF 2 plus NF 6 plus
Capacity of the mixed bed resin
0
1000
2000
3000
4000
5000
6000
7000
8000
1 2 4 6 8 10 12 14 16 18 20 22 24 26 28
CAPCITY IN LITER
TOTAL HARDNESS IN °DH
CAPACITY REFILL STATION (NF plus)
NF 12 plus NF 25 plus
Refill station Capacity figure at 1° dH
NF 2 plus 4500 liter
NF 6 plus 10000 liter
NF 12 plus 24000 liter
NF 25 plus 48000 liter
The capacity figure is used and divided by the raw water hardness in ° dH. The result is the capacity of the mixed bed resin in
liter.

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Troubleshooting
Fault Solution
No display or battery
symbols appears
Low battery power alert
The “battery” symbol on the display will blink when the batteries are drained.
The last measured and displayed value and the settings will be stored and
recovered when the battery replacement is completed.
Inserting/replacing the batteries
Remove the four front screws of the housing (see illustration below) and insert
three batteries (AAA alkaline) into the battery holder. The front part of
the housing can be turned by 90° or 180° if desired before fastening with the
screws.
Video
The resin is exhausted
quicker than calculated
Loss of capacity
There is probably no fault. It could be that the untreated water contains not
only limescale (calcium carbonate) but also other dissolved substances (sulphates,
nitrates, chlorides) which are removed and thus reduce the capacity.

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Technical Data
NF 2 plus, 6 plus NF 12 plus NF 25 plus
Description
magnetic®NF plus for the production of deionized heating system water in accordance with the latest directives/standards
(VDI 2035 and SWKI BT 102-01), on the basis of ion exchange. Resin container made of stainless steel or polyglass bottle
with floor stand or wall-mounting bracket. Head part with integrated shut-off valves and vent valve. Easy resin replacement
by user possible. Integrated measuring counter for flow rate, total water flow quantity, water quality and limit value checking.
Battery-powered with automatic switch-on function. Suitable for permanent connection if the specific requirements and plan-
ning directives (e.g. DIN EN 1717) are complied with.
Refill station NF 2 plus NF 6 plus NF 12 plus NF 25 plus
Annual consumption < 250 l < 500 l < 2500 l < 10000 l
Capacity at 1°dH 4.5 m310 m3 24 m348 m3
Fill rate 5 l/min 7 l/min 17 l/min 20 l/min
Operating pressure < 6 bar < 6 bar <6 bar < 6 bar
Max Temp. 60 °C 60 °C 60 °C 60 °C
Installation Length 490 mm 490 mm 370 mm 370 mm
Height 460 mm 560 mm 1022 cm 1490 mm
Empty weight 5 kg 5 kg 13 kg 23 kg
Resin filling 2.7 l 6.5 l 12.5 l 25 l

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Date Resin changed Liter total Signature
Maintenance
Installer: Object:
Date of installation: Serial number:

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www.magnetic-online.de
magnetic GmbH & Co. KG
Am Richtbach 5
D-74547 Untermünkheim
Tel. [phone]
Fax [phone]
[e-mail]
www.magnetic-online.de
Managing Shareholder:
Michael Bader
VAT ID No.: DE 255 018 730
Commercial Register No.: HRA 571362
Register Court: Stuttgart