11
Water filter maintenance
1. The water filter supplied with this unit is designed to both
protect the boiler and provide high quality drinking water
free of sediment, chlorine and other potentially harmful
contaminants.
2. Changing the filter cartridge every 6 months will keep the
boiler in good condition and maintain the quality of the
filtered drinking water. Franke will not accept
responsibility for boiler failures due to the build-up of
limescale if the filter cartridge has not been replaced at
the recommended 6 month intervals.
3. The occasional wash in warm soapy water is sufficient to
keep the plastic housing clean. Under no circumstances
should the plastic filter housing come into contact with
any proprietary cleaners such as kitchen sprays, bleach
etc. as contact with certain chemicals can degrade the
plastic and cause it to fail.
4. The plastic housing must be replaced every 10 years
due to the tendency of plastic materials to degrade and
weaken over time.
5. A smear of WRAS approved silicon grease applied to the
filter sump thread and to the rubber sealing ring in the
head of the filter at each cartridge change will make it
easier to unscrew the sump. Only a WRAS approved
alternative grease must be used for this purpose.
Non-approved greases may degrade both the seal and
the plastic housing and lead to eventual failure. Small
tubes of WRAS approved silicon grease are available at
www.frankefilterflow.co.uk.
6. The standard replacement filter cartridge for the Franke
Omni system is the Franke 08. The Franke 08 will
remove sediment, chlorine and other chemicals as well
as prevent limescale from damaging the boiler. It should
be replaced every 6 months. Other filters are available
for specialist applications, for more information visit
www.frankefilterflow.co.uk
Changing the filter cartridge
1. Operate the switch on the front of the boiler to switch off
the boiler power supply.
2. Shut off the water supply to the filter using the adjacent
stop-valve.
3. Press the red button at the top of the filter unit to exhaust
the pressure in the system. It will not be possible to
unscrew the filter canister if this operation is not carried
out.
4. Place a shallow container in the cabinet to catch any
water residues when removing the filter sump. Grip the
sump firmly and turn it firmly to the left to break the seal.
Unscrew the sump by hand until it separates from the
head of the filter.
5. If the old cartridge does not automatically fall free press
down on the top mount of the cartridge to release it.
Remove the old cartridge and discard the remaining water
in the sump.
6. Remove the new filter cartridge from its packaging, wet
the “O” seal and place it in the filter sump. Position the
sump, with the cartridge inside, under the filter head and
screw it in place. The cartridge should engage
automatically. Tighten the sump sufficient to make a water
tight seal.
7. Turn the water supply ‘on’ and check the system carefully
for leaks.
8. Operate the system and run the filtered water for a few
moments until the water runs clear. Run the boiling water
for a moment to release any trapped air.
9. Turn the boiler power supply back on.
