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7.
Filter
Checking the filter life
The premium filter used with the product system is designed
for three functions:
1.
A coarse pre-filtration and fine 5 micron post filtration
membrane this is designed to reduce dirt, clay, rust,
debris and sediment.
2.
An activated carbon filter to improve the taste and
odour of the drinking water, which has an approximate
capacity of 1700 litres at 12.5 °Clark. You will notice this
element of the filter media is reaching its expiration
when you begin to taste and smell the chlorination of
the water.
3.
An ION selective filter: to reduce the water hardness
minerals and protect the boiler from calcification (scale)
whilst retaining other useful mineral content. The
capacity of this filter media is variable; please see the
"filter installation" section for further details. You may
not notice the filter reaching the expiration without
testing your water. Accordingly, the boiler will remind
you when it is time to check it. If you live in a known
high scale (hard water) area and do not replace the
filter frequently enough, the calcification (scale build
up) will reduce the energy efficiency of you boiler and
prematurely wear internal parts.
The filter life will depend greatly on many factors such as:
• Your water quality (hardness).
• Your preferred temperature setting.
• The number of people using the product.
• The usage frequency.
• The head bypass setting.
• The split usage of cold or boiled filtered water.
• The incoming water pressure and flow rate settings.
Only filtered water passing through the boiler is measured.
Cold filtered water is ignored and the above variables are
unknown, so the filter life indicator should only be used as
a reminder to test the filter function. You may find the filter
lasts longer or shorter than it suggests depending on the
above factors.
Due to our policy of continual improvement, we reserve the right to change specifications without prior notice.
Does my filter need replacing?
Your boiler displays a 'check filter reminder status bar' and has
an audible beep when it reaches its estimated end point. This
is based on 'average' volume and time limits and is designed
to help remind you to check the filter.
Each installation has a different number of people using it,
a different usage pattern and an individual water hardness "
°Clark". Because of this the boiler will only remind you when
to check the filter, you must judge for yourself if the filter
needs changing or not, as no two installations are the same.
The status bar time limit is 6 months. This reminder is
based on 19 °Clark (London) hardness of water and an
estimated 5 litres filter use per day. The filter volume at this
hardness is approximately 1020 litres. Research shows a near
50/50 split of average water use between domestic boiled
and ambient filtered water usage.
The volume limit is 1750 litres. Based on half the capacity of
the filter in the softer water conditions, this assumes 50% of
the water is used for cold drinking water only.
After these limits the reminder status bar will reach the
bottom and the boiler will beep each time when you
dispense hot water. This beep is to remind you to check the
filter, therefore ensuring the quality of water is consistent and
the boiler is protected from any scale build up.
We also operate an automated filter reminder scheme to
suggest when the filter is likely to need a replacement. Our
customer care team will call or email with a reminder when
replacement is likely to be required.
Irrespective of your water quality or usage pattern we
recommend that the filter is replaced at minimum every 6
months in areas of a hardness 9 °Clark or higher, and no later
than 12 months in areas of a hardness 8 °Clark or lower.
If you don't know the hardness (GB Clark rating) of your water,
test your unfiltered cold water, refer to your installer's guide,
check your postcode on your water supplier's website or
contact your service agent for more help.
The filter head should be replaced after 5 years of
n
#
service.
You will find that once you have changed the filter a
n
L
few times you will get a feel for your personal water
hardness and filter replacement schedule, the need
to check the filter will become less frequent and
quicker.
12
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