Care/Cleaning; Care; Cleaning Of Heating Side; Cleaning The Heat Source System - Dimplex Sij 75Ter+ Montageanweisung

9

Care/Cleaning

9.1 Care

To prevent malfunctions due to sediments in the heat exchang-
ers, care must be taken that no im-purities can enter the heat
source system and the heating installation. In the event that op-
erating malfunctions due to contamination occur nevertheless,
the system should be cleaned as described below.

9.2 Cleaning of Heating Side

ATTENTION!
The supplied strainer must be fitted in the heating water inlet of the heat
pump in order to protect the condenser against the ingress of impurities.
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.
NOTE
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 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 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.
The manufacturer's instructions regarding cleaning agent must
be complied with at all times.
www.dimplex.de
9.3 Cleaning the Heat Source
System
ATTENTION!
The supplied strainer must be fitted in the heat source inlet of the heat
pump in order 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.

9.4 Maintenance

Devices with a minimum of 3 kg refrigerant, or hermetically
sealed devices with a minimum of 6 kg refrigerant must be leak-
proof tested yearly by the operator according to (EC) No. 842/
2006.
The leak-proof testing is to be documented and archived for a
minimum of 5 years. The test is to be carried out by certified per-
sonnel only according to (EC) No. 1516/2007. The attached table
can be used as a basis for the documentation.
NOTE
Local regulations may differ from EU directive 842/2006. The appropriate
local regulations for heat pump leak tests must be observed.
10 Malfunctions /
Troubleshooting
This heat pump is a quality product and is designed for trouble-
free operation. In the event that a malfunction occurs neverthe-
less, it will be indicated on the display of the heat pump manager.
Simply consult the Malfunctions and Troubleshooting table con-
tained in the in-stallation and operating manual of the heat pump
manager (manager).
If you cannot correct the malfunction yourself, please contact the
after-sales service agent in charge.
ATTENTION!
All work on the heat pump may only be performed by an authorised an
qualified after-sales service.
ATTENTION!
Disconnect all electrical circuits from the power supply before opening
the enclosure.
11 Decommissioning /
Disposal
Before removing the heat pump, disconnect the unit from the
power source and close all valves. The deinstallation of the heat
pump must be performed by technical personnel.
Environment-relevant requirements regarding the recovery, re-
cycling and disposal of service fuels and components in accord-
ance with all relevant standards must be adhered to. Particular
attention must hereby be paid to the proper disposal of refriger-
ants and refrigeration oils.
452234.66.47 · FD 9403
SIJ 75TER+
EN-9