Brita PROGUARD Coffee Mode D'emploi page 77

# Error
Issue with
coffee machine
(corrosion,
5
limescale
deposits, gypsum
deposits)
Pressure needle
on manometer:
• Pressure
regularly <1,7 bar
• Pressure
<1,2 bar
Temporary
6 pressure drop into
the red area
(<1.3 bar)
Permanent
pressure rise into
the yellow area
(>2.8 bar)
Root cause
Water consumption outside of
product specification (too low,
too high)
In case of limescale deposits:
Bypass of the PURITY C Quell ST
pre-filter not set correctly
Membrane clogged
(Non-electric) pump defective
Insufficient line pressure
(Non-electric) pump defective
Time-limited pressure drop into the red area is possible if the storage tank
is empty AND water is drawn from the coffee machine at the same time
(via the now automatically opened bypass valve) since the flow pressure
(dynamic pressure) is lower than the back pressure (static pressure). As
soon as water is no longer drawn off from the coffee machine, the needle
moves back into the yellow range. The phenomenon is normal and is not
a problem.
A very quick, sudden stop of the water supply by the downstream coffee
machine can lead to an increased pressure display on the manometer. As
a result, the pressure needle remains in the upper yellow area (> 2.8 bar)
until water is drawn from the coffee machine again. The phenomenon is
due to the design of the coffee machine and is not a problem.
Measures service technician
Make sure that the usual water
consumption of the coffee machine
meets the specifications of
PROGUARD Coffee
Minimum
required filtrate 10 litres/day
withdrawal
Maximum 80 litres/day
permissible
30,000
filtrate
litres/year
withdrawal
The water consumption of the
coffee machine should not exceed
the maximum filtrate production
per hour (depending on the inlet
pressure) too often, otherwise the
bypass valve will open too often.
3 bar ~10l/h
4 bar ~13l/h
5 bar ~16l/h
6 bar ~20l/h
• Measure the raw water quality
• Use the app to calculate the
recommended bypass setting
• If necessary, adjust the bypass
of the pre-filter head and note the
result it in the service log
Replace the PURITY C150
PROGUARD cartridge
Replace the (non-electric) pump
Check the line pressure. If the line
pressure is <3 bar, install an electric
booster pump
Replace the (non-electric) pump
EN
77