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9
Cleaning / maintenance
9.1 Maintenance
To protect the cover, avoid leaning anything against the device
or putting objects on the device. External parts can be wiped
clean with a damp cloth and domestic cleaner.
NOTE
i i i i
Never use cleaning agents containing sand, soda, acid or
chloride, as these can damage the surfaces.
9.2 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 either case, the cleaning fluid should be at room
temperature. We recommend flushing the heat exchanger in
the direction 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 adhered to.
The manufacturer's instructions regarding cleaning agent must
be complied with at all times.
9.3 Corrosion Protection Anode
The corrosion protection anode installed in the hot water cylin-
der should be electrically checked on a regular basis, at least
every two years after start-up, and be replaced if necessary.
Electrical checking is carried out by means of a suitable amme-
ter, without draining the tank.
Procedure:
1)
Unplug PE cable from protection anode tab.
2)
Connect ammeter (0...50 mA) between PE cable and tab.
3)
Evaluation
of
Measured value > 1 mA protection anode is in working
order.
Measured value < 1 mA protection anode must be
tested or replaced.
EN-8
protection
anode
452162.66.25-EN · FD 0402
10 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!
Before opening the device, ensure that all circuits are
disconnected from the power supply!
After disconnecting the power supply, always wait for at least 5
minutes to allow stored electric charges to dissipate.
CAUTION!
Work on the system must only be performed by authorised
and qualified after-sales service technicians.
11 Decommissioning / disposal
Before removing the hydro tower, disconnect it from the power
source and close all valves. The heat pump must be installed by
trained personnel. Observe all environmental requirements re-
garding the recovery, recycling and disposal of materials and
components in accordance with all applicable standards.
wear:
HWK 332HC
www.dimplex.de
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