Id.: 17-16-26-3017-03 | 6.2017
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6.
MAINTENANCE
The device must be visually inspected once a year. The electrical and hardware installation of the device
as well as the state of the evaporator have to be inspected. In case irregularities and impurities are
detected on the evaporator or clotting of the channels between the lamellas, contact the authorised
maintenance worker to perform cleaning.
CAUTION
The servicing and maintenance of the device can only be performed by a person authorised
by the manufacturer. In case of a malfunction, first contact the installer who installed the
device.
6.1 Cleaning the water filter
NOTE
Cleaning of water filters on the return into the device is advised to be performed at least
once yearly.
CAUTION
A blocked water purifying component and magnetic filter can lead to a malfunction of the
device or incorrect functioning of the device. In case the display displays a warning of flow
malfunction (”Caution, flow!”).
6.2 Monitoring the pressure in the heating system
NOTE
Periodically, once yearly, check the water temperature in the heating system.
NOTE
In case the pressure falls (i.e. Leakage of the system) the display displays a warning of flow
malfunction (”Caution, flow!”).
6.3 Cleaning of the heat conductors
6.3.1 Cleaning of the heating system (water side)
Residue of grease and sealants in pipes can pollute the condenser of the device up to a point where
cleaning is necessary. In this case the authorised person should perform the cleaning with a mild
solution (up to 5 %) of phosphorous acid which should be heated to room temperature. The condenser
has to be completely disconnected from the heating system and rinsed with diluted phosphorous acid
in the opposite direction of normal flow.
After cleaning the condenser has to be rinsed thoroughly with an agent neutralising the acid detergent
so as to prevent contamination of the heating system.
CAUTION
Acid detergents should be used carefully, instructions of the manufacturer and
environmental regulations must be followed. The cleaning can only be performed by a
qualified person.
If any doubts about using the detergents arise, consult with the manufacturer of the detergent.