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10 Cleaning / maintenance
10.1 Care
To protect the casing, avoid leaning anything against the device
or putting objects on the device. Outdoor components can be
wiped clean with a damp cloth and domestic cleaner.
CAUTION!
Never use cleaning agents containing sand, soda, acid or
chloride, as these can damage the surfaces.
CAUTION!
For cleaning and maintenance, especially when removing
covers, the entire system must be disconnected from the
power supply beforehand.
10.2 Cleaning the heating system
The ingress of oxygen into the heating water circuit may result
in the formation of oxidation products (rust), particularly if steel
components are used. These enter the heating system via the
valves, the circulating pumps and/or plastic pipes. A diffusion-
resistant installation is therefore essential, especially with re-
gard to the piping of underfloor heating systems.
Residue from lubricants and sealants may also contaminate the
heating water.
In the event of severe contamination leading to a reduction in
the performance of the liquefier in the heat pump, the system
must be cleaned by a heating technician.
Based on current information, we recommend using a 5%
phosphoric acid solution for cleaning purposes. However, if
cleaning needs to be performed more frequently, a 5% formic
acid solution should be used.
In both cases, the cleaning fluid should be at room tempera-
ture. We recommend flushing the heat exchanger in the direc-
tion opposite to the normal flow direction.
To prevent acidic cleaning agents from entering the heating
system circuit, we recommend connecting the flushing device
directly to the flow and return of the liquefier of the heat pump.
It is then important that the system be thoroughly flushed using
appropriate neutralising agents to prevent any damage from
being caused by cleaning agent residue remaining in the sys-
tem.
Acids must be used with care and the regulations of the em-
ployers liability insurance associations must be adhered to.
The instructions of the cleaning agent manufacturer must al-
ways be observed.
EN-28
10.3 Corrosion protection anode
The corrosion protection anode installed in the domestic hot
water cylinder should be electrically checked on a regular basis
(at least every two years after commissioning) and be replaced
as necessary. Electrical checking is carried out by means of a
suitable ammeter, without draining the cylinder.
Procedure:
1)
Unplug the PE cable from the protection anode tab.
2)
Connect the ammeter (0 to 50 mA) between the PE cable
and the tab.
3)
Evaluation of wear on the protection anode:
Measured value > 1 mA
order.
Measured value < 1 mA
tested and/or replaced.
11 Faults / troubleshooting
This heat pump is a quality product and is designed for trouble-
free operation. Should a fault occur, however, it will be indi-
cated on the heat pump manager display. In this case, consult
the "Faults and troubleshooting" page in the operating instruc-
tions of the heat pump manager. If you cannot correct the fault
yourself, please contact your after-sales service technician.
CAUTION!
Work on the system must only be performed by authorised
and qualified after-sales service technicians.
12 Decommissioning/disposal
Before removing the heat pump, disconnect it from the power
source and close all valves. The heat pump must be dismantled
by trained personnel. Observe all environmental requirements
regarding the recovery, recycling and disposal of materials and
components in accordance with all applicable standards.
CAUTION!
The dismantling and handling of refrigerating machine oils
and refrigerants are subject to local and national regulations.
This work must only be carried out by specialist companies.
Do not attempt to open, drain or dispose of the system
yourself. There is a risk of injury and death.
452172.66.01-EN · FD 0204
LIA 0608HWCF M - LIA 0911HWCF M
protection anode is in working
protection anode must be
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Troubleshooting
