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8.14 Cartridge filter
This section is only relevant, if the AQpure system is
Note
equipped with an activated carbon filter module. See
fig. 5, pos. 10.
The cartridge filter ensures that no residual particles remain in
the water (e.g. from the upstream GAC filter). It needs to be
replaced after a certain period of time depending on the feed
water quality. See section:
8.3 Basic maintenance
system indicates the requirement for this maintenance task with a
warning or an alarm. See section:
Position of the component
See fig. 9, pos. 42.
8.14.1 Filter cartridge specification
The filter cartridge must comply with the following specification:
Pore size
Material
Type
Diameter external
Diameter internal
Length
8.14.2 Preparations
The following tools are required for this maintenance task:
•
filter housing key (optional)
•
flat container
•
cloth
•
nylon brush
•
water-tight foil
8.14.3 Cartridge filter overview
42.1
42.7
42.6
42.5
Fig. 27 Cartridge filter maintenance
Pos. Description
42.1 O-ring
42.2 Filter cartridge
42.3 Centring ring
42.4 Filter housing key
44
schedule. The
7.5 Warnings and
alarms.
[μm]
5
PP
meltblown
114 / 4.5
[mm / inch]
26 / 1
508 / 20
42.7
42.2
42.8
42.3
42.2
42.4
Pos. Description
42.5 Top part
42.6 Deaeration valve
42.7 Filter housing
42.8 Centring nipple
8.14.4 Maintenance of cartridge filter
1. Unless the system is already stopped due to an active alarm,
stop the system by pressing the [Stop] button on the HMI.
Warning
Danger from running system!
Make sure, that the Grundfos Eye has stopped
rotating before starting any work on the system
components or lines!
The following steps refer to fig.: 6-9.
2. Once the system is stopped, solenoid valve (43) is closed
automatically.
3. Cover all electrical components around and below the working
area with water-tight foil, so that no water can ingress and
damage those components.
4. Place a flat container under the cartridge filter.
5. Close manual valve (33).
The following steps refer to fig.: 27.
6. Place a cloth on deaeration valve (42.6) and carefully press it
down to depressurise the filter. Some pressurised water may
come out.
7. Use filter housing key (42.4) or your hands to loosen the filter
housing (42.7).
8. Remove filter cartridge (42.2) from filter housing (42.7).
9. Pour the water from filter housing (42.7) into the flat container
or a suitable drain.
10. Put on chemically resistant gloves and tight-fitting protective
goggles.
11. Clean filter housing (42.7) and top part (42.5) with clean
potable water and a nylon brush.
– If necessary, a 0.05 % sodium hypochlorite solution can be
used for cleaning. Observe section:
12. Centring ring (42.3) is delivered together with the new filter
cartridge.
13. Place centring ring (42.3) on the new filter cartridge as shown
in the figure.
14. Put new filter cartridge (42.2) into filter housing (42.7).
– Make sure, that filter cartridge (42.2) is placed exactly
centred in filter housing (42.7).
– Cartridge (42.2) must be slipped onto centring nipple (42.8)
at the bottom of filter housing.
15. Replace O-ring (42.1).
16. Check, that O-ring (42.1) is placed correctly in the filter
housing.
17. Screw filter housing (42.7) with new filter cartridge back into
top part (42.5).
– Make sure, that the filter cartridge is exactly centred. Only a
centred cartridge ensures proper filtering.
– Tighten the filter housing carefully using filter housing key
(42.4) or your hands.
The following steps refer to fig.: 6-9.
18. Slowly open manual valve (33).
– Check, if water leaks from the filter. In case of leakage,
carefully try to retighten the filter housing. If this does not
help, close manual valve (33) again and check the O-ring.
19. Remove the water-tight foil and the flat container without
getting any water on electrical components.
20. If the alarm of the maintained component is active, press the
[Reset] button on the HMI to restart the system. Otherwise
press the [Start] button to restart the system.
8.6 Cleaning
agents.
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