Cleaning / Maintenance; Cleaning & Maintenance; Cleaning The Heating System; Cleaning The Heat Source System - Dimplex SI 35TUR Montage- & Bedienungsanleitung/Gebrauchsanweisung

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9

Cleaning / maintenance

9.1 Maintenance
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 op-
erating malfunctions due to contamination occur nevertheless,
the system should be cleaned as described below.

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 complete piping.
NOTE
To avoid sediments (e.g. rust) in the heat pump condenser, it is
advisable to use a suitable corrosion protection system.We
recommend equipping open diffusion heating systems with
an electrophysical corrosion
ELYSATOR system).
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 (heating operation) flow direction.
The position of the actuator on the 4-way mixer valve must be
observed here.
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.
9.3 Cleaning the heat source
system
ATTENTION!
The supplied dirt trap must be inserted in the heat source inlet
of the heat pump to protect the evaporator against the ingress
of impurities.
The filter sieve of the dirt trap should be cleaned one day after
start-up. Further checks must be set according to the level of
dirt. If no more signs of contamination are evident, the filter can
be removed to reduce pressure drops.
EN-10
protection system (e.g.
452237.66.54 · FD 9912
10 After-sales service /
maintenance
In the event of an after-sales service call, in particular for any re-
pair work on the hydraulic 4-way reversing valve, the switch box
can be folded open for better accessibility. For this process, the
two screws fixing the switch box (operator side) must be re-
moved in the switch box panel and the outer screws on the cor-
ner frame must be removed - the switch box is then supported
on the front bracket. Two support struts, incl. screws and nuts
M5, are included with the switch box in the mini-grip bag. Tilt
the switch box. Above this bracket, there are holes 5.2 in the
corner frame sections. The support struts must be secured on
these holes with screws and nuts so that the struts can still
move slightly.
Press the support struts towards the centre of the switch box so
that they engage in equivalent punched geometries in the
switch box with their "locking lugs". The inherent tension means
that the support rods move into the outer punch geometry of
the switch box and prevent the struts from coming loose on
their own.

11 Faults / troubleshooting

This heat pump is a quality product and is designed for trouble-
free operation. In the event that a fault should occur, it will be
indicated on the heat pump manager display. In this case, con-
sult the "Faults and troubleshooting" page in the operating in-
structions of the heat pump manager.
If you cannot correct the fault yourself, please contact your
after-sales service technician.
ATTENTION!
Work on the heat pump must 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. The heat pump must be dismantled
by trained personnel. All environmentally-relevant require-
ments regarding the recovery, recycling and disposal of materi-
als and components should be observed in accordance with
the applicable standards. Particular attention should be paid to
the proper disposal of refrigerants and refrigerant oils.
SI 35TUR
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