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LAW 6IMR - LAW 14ITR
10 Cleaning / maintenance
10.1 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.
ATTENTION!
Never use cleaning agents containing sand, soda, acid or chloride, as
these can damage the surfaces.
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-re-
sistant installation is therefore essential, especially with regard 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% phos-
phoric acid solution for cleaning purposes. However, if cleaning
needs to be performed more frequently, a 5% formic acid solu-
tion should be used.
In both cases, the cleaning fluid should be at room temperature.
We recommend flushing the heat exchanger in the direction op-
posite to the normal flow direction.
To prevent acidic cleaning agents from entering the heating sys-
tem circuit, we recommend connecting the flushing device di-
rectly 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 system.
Acids must be used with care, and the regulations of the employ-
ers' liability insurance associations adhered to.
The instructions of the cleaning agent manufacturer must always
be observed.
EN-18
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 if
necessary. The electrical inspection is carried out using a suita-
ble 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)
Assessment of the protection anode wear:
Measured value> 1 mA
Measured value< 1 mA
checked or replaced.
11 Faults / troubleshooting
LAWC devices are high-quality products and should work without
problems. Should a fault occur, however, it will be indicated on
the heat pump manager display. In this case, consult the "Faults
and troubleshooting" page in the operating instructions of the
heat pump manager. If you cannot correct the fault yourself,
please contact your after-sales service technician.
ATTENTION!
Work on the system must only be performed by authorised and qualified
after-sales service technicians!
12 Decommissioning /
disposal
Before dismantling the LAW device, 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.
452162.66.04 · FD 9606
protection anode OK.
protection anode must be
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