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9
9
Maintenance / Cleaning
9.1 Maintenance
To protect the paintwork, avoid leaning anything against the de-
vice or putting objects on the device. External heat pump parts
can be wiped with a damp cloth and domestic cleaner.
ATTENTION!
Never use cleaning agents containing sand, soda, acid or chloride as
these can damage the surfaces.
To prevent faults due to sediment in the plate heat exchanger of
the heat pump, ensure that the heat exchanger in the heating
system can not be contaminated. In the event that operating mal-
functions due to contamination still occur, the system should be
cleaned as described below. (Warning: The fins on the finned
tube heat exchanger are sharp-edged -⇒ danger of being cut!)
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 products enter the heating system
via the valves, the circulating pumps and/or plastic pipes. It is
therefore essential - in particular with respect to the piping of un-
derfloor heating systems - that only diffusion-proof materials are
used.
ATTENTION!
We recommend the installation of a suitable corrosion protection system
to prevent the formation of deposits (e.g. rust) in the condenser of the
heat pump.
Residue from lubricants and sealants may also contaminate the
heating water.
In the case of severe contamination leading to a reduction in the
performance of the liquifier in the heat pump, the system must be
cleaned by a heating technician.
According to today's state of knowledge, 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 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 flow of the liquifier of the heat pump.
It is important that the system be thoroughly flushed using appro-
priate neutralising agents to prevent any damage from being
caused by cleaning agent residue remaining in the system.
Acids must be used with great care and all relevant regulations of
the employers' liability insurance associations must be adhered
to.
If in doubt, contact the manufacturer of the chemicals!
E-8
All manuals and user guides at all-guides.com
9.3 Cleaning the Air System
The finned tube heat exchanger, ventilator and condensate out-
flow should be cleaned of contaminants (leaves, twigs, etc.) be-
fore each new heating period. These types of contaminants can
be manually removed using compressed air or by flushing with
clean water.
It may be necessary to remove the device cover and air inlet grid
first.
Before opening the device, ensure that all circuits are isolated from the
power supply.
To prevent the evaporator and the condensate tray from being
damaged, do not use hard or sharp objects for cleaning.
Under extreme weather conditions (e.g. snow drifts), ice may
form on the air intake and exhaust air outlet grids. If this happens,
the ice must be removed in the vicinity of the air intake and ex-
haust air outlet grids to ensure that the minimum air flow rate is
maintained.
10 Faults / Trouble-
This heat pump is a quality product and is designed for trouble-
free and maintenance-free operation. However, if a fault does oc-
cur, use the following information to check whether you can elim-
inate the fault yourself.
The heat pump will not operate!
Please check whether:
The set temperature level cannot be reached!
Please check whether:
If you cannot correct the fault yourself, please contact your after-
sales service technician.
Any work on the heat pump may only be performed by authorised and
qualified after-sales service technicians.
11 Decommissioning /
Before removing the heat pump, disconnect it from the power
source and close all valves. Observe all environmentally-relevant
requirements regarding the recovery, recycling and disposal of
materials and components in accordance with all applicable
standards. Particular attention should be paid to the proper dis-
posal of refrigerants and refrigeration oils.
ATTENTION!
Shooting
There is supply voltage (tripped fuse, power failure).
The operating switch on the remote control and the correct
setpoint temperature have been set.
The permissible operating conditions for the heat pump
have been adhered to (air temperatures too high or too low).
The air inlet or outlet area is blocked, restricted or very dirty.
There are closed valves or stop-cocks in the water pipes
(heating pipes).
The water temperatures in the buffer tank are sufficient.
ATTENTION!
Disposal
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