Cleaning / Maintenance; Maintenance; Cleaning The Heating System; Cleaning The Heat Source System - Dimplex SI 130TUR+ Installation And Operating Instructions Manual

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Cleaning / Maintenance

9.1 Maintenance

The heat pump is maintenance-free. To prevent malfunctions
due to sediments in the heat exchangers, care must be taken
that no im-purities can enter the heat source system and the
heating installation. In the event that operating 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. They enter the heating system via the
valves, the circulating pumps and/or plastic pipes. It is therefore
essential - in particular with respect to the entire pipework - that
only diffusion-resistant 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. We recommend equipping diffusion-open heating systems
with an electrophysical anti-corrosion system (e.g. ELYSATOR system).
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 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 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 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 must be adhered to.
In case of doubt, consult the manufacturer of the cleaning
agents!
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 screen of the strainer should be cleaned one day after
commissioning, thereafter every week. If no more contamination
can be noticed any more, the strainer filter can be removed in
order to reduce pressure losses.
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9.4 Maintenance
Refrigerating circuits with a minimum refrigerant quantity of 3 kg,
or "hermetically sealed" refrigerating circuits with a minimum re-
frigerant quantity of 6 kg, must be tested for leaks yearly by the
operator according to regulation (EC) No. ES842/2006.
The leak test is to be documented and archived for a minimum of
5 years. The test is to be carried out by certified personnel only
according to regulation (EC) No. 1516/2007. The attached table
can be used as a basis for the documentation.

10 Faults / Troubleshooting

This heat pump is a quality product and is designed for trouble-
free and maintenance-free operation. In the event that a fault
should occur, it will be indicated on the heat pump manager dis-
play. In this case, consult the Faults and troubleshooting page in
the operating instructions of the heat pump manager. If you can-
not 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 supply before opening
the enclosure.
11 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 refrigerant oils.
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