Maintenance And Cleaning; Maintenance; Cleaning Of Heating Side; Cleaning The Heat Source System - Dimplex SI 8 MR Montage- Und Gebrauchsanweisung

10 Maintenance and
Cleaning

10.1 Maintenance

The heat pump is maintenance-free. To prevent faults due to
sediment in the heat exchangers, care must be taken to ensure
that no impurities can enter either the heat source system or the
heating system. In the event that operating malfunctions due to
contamination occur nevertheless, the system should be cleaned
as described below.

10.2 Cleaning of Heating Side

The ingress of oxygen into the heating water circuit, in particular
if it contains steel components, may result in the formation of ox-
idation products (rust). These can enter the heating system via
valves, circulating pumps or plastic tubing. It is therefore impor-
tant - in particular with respect to the piping of underfloor heating
systems - that the installation be executed in a diffusion-proof
manner.
ATTENTION!
To prevent the accumulation of deposits (e.g. rust) we recommend using
a suitable corrosion protection system.
In the case of severe contamination leading to a reduction in the
performance of the condenser in the heat pump, the system must
be cleaned by a heating technician.
Based on current knowledge, we recommend cleaning with a
5% phosphoric acid solution or, in the case that cleaning needs
to be performed more frequently, with a 5% formic acid solution.
In either case, the cleaning fluid should be at room temperature.
It is recommended that the heat exchanger be cleaned in the di-
rection opposite to the normal flow direction.
To prevent acidic cleaning agents from entering the circuit of the
heating installation we recommend that the flushing device be fit-
ted directly to the supply and return lines of the condenser of the
heat pump.
Thereafter the system must be thoroughly flushed using appro-
priate neutralising agents in order to prevent any damage caused
by cleaning agent residues that may still be present in the sys-
tem.
All acids must be used with great care, all relevant regulations of
the employers' liability insurance associations must be adhered
to.
If in doubt, contact the manufacturer of the chemicals!
10.3 Cleaning the Heat Source
System
ATTENTION!
Insert a dirt trap in the heat source inlet of the heat pump to protect the
evaporator against the ingress of impurities.
Clean the dirt trap's filter screen one day after start-up and sub-
sequently at weekly intervals. If no more signs of contamination
are evident, the filter can be removed to reduce pressure drops.
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11 Faults and Trouble-
shooting
This heat pump is a quality product and is designed for trouble-
free operation. In the event that a fault should occur, you should
be able to correct the problem yourself in most cases.
If you cannot correct the fault yourself, please contact your after-
sales service technician.
ATTENTION!
Any work on the heat pump may only be performed by authorised and
qualified after-sales service technicians.
ATTENTION!
Disconnect all electrical circuits from the power source prior to opening
the device.
12 Decommissioning/
Disposal
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.
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