OEG SecuFresh 22 Montage- Und Bedienungsanleitung Seite 27

Malfunction
Pump noise
Insufficient tapping
quantity
Insufficient tapping
temperature
Drinking water does
not heat up
The manufacturer recommends having the system serviced annually by authorised,
specialist personnel.
Cleaning the heat exchanger
Regularly clean the unit if deposit build-up can be expected due to unfavourable water
quality (e.g. extremely hard water or pronounced soiling). Cleaning maintains the flow
rates in the event of scale deposits, but it also reduces the service life.
There is the option of cleaning the unit by flushing it.
Flush the heat exchanger in the direction opposite to the normal flow direction using a
suitable cleaning solution.
Make sure any chemicals used for cleaning are suitable for stainless steel, copper or
nickel. Non-compliance may result in permanent damage to the heat exchanger! Always
observe the cleaning agent manufacturers' safety instructions and recommendations.
Use only chloride-free water or water with a low chloride content and water hardness for
cleaning solutions. Choose the cleaning agent to match the type of contamination and
resistance of the heat exchanger plates. It is important to obtain confirmation from the
cleaning agent manufacturer that the cleaning agent will not cause corrosion of the heat
exchanger plates to be cleaned. Clean the heat exchanger as per the cleaning agent
manufacturer's work instructions.
After cleaning, the acid remaining in the system must be neutralised and the metal
surfaces passivated. Passivation is mandatory to prevent any development of corrosion.
Always rinse the clean heat exchanger and system using a sufficient amount of fresh
water.
SecuFresh Fresh water station
Possible cause
Air in the system
Insufficient water pressure
Calcification in heat
exchanger
Incorrect thermostat setting Incorrect thermostat setting
Excessive pressure loss in the Check the piping, change if
piping on the heating side
Air in the system.
Hot water flow switch not
connected correctly or
faulty.
Stainless steel spiral sensor
calcified or faulty
Pump faulty
Remedy
Bleed
Check pressure, increase if
necessary
Decalcify/replace
necessary
Bleed
Check, replace if applicable
Check, replace if applicable
Check, replace if applicable
27
Malfunctions/ 7
troubleshooting
8
Maintenance / service
GB