Dimplex SI 75ZS, SI 50ZS Care/Cleaning, Cleaning of Heating Side, Cleaning of Heat Source Side

CARE/CLEANING

9CARE/CLEANING

9.1 Care

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.

CAUTION! Caution - Heating Technicians ! Depending on the filling water quality and quantity, in particular in the case of mixed installations and plastic pipes, mineral deposits (rust sludge, lime) may form, impairing the pro- per functioning of the heating installation. A reason for this is the water hardness and oxygen dissolved in the filling water as well as additio- nal oxygen from the air, which may penetrate via valves, fittings and plastic pipes (oxygen diffu- sion). As a preventive measure it is re- commended that a physical water conditio-ner such as ELYSATOR be used.

9.2 Cleaning of Heating Side

The ingress of oxygen into the heating water circuit may result in the formation of oxidation products (rust). It is therefore important - in particular with respect to the piping of underfloor heating systems - that the installation is executed in a diffusion- proof manner. Also residues of lubricating and sealing agents may contaminate the heating water.

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 direction 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 fitted directly to the supply and return lines of the condenser of the heat pump.

Thereafter the system must be thoroughly flushed using appropriate neutralising agents in order to prevent any damage caused by cleaning agent residues that may still be present in the system.

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!

9.3 Cleaning of Heat Source Side

CAUTION! The supplied strainer is to be install- ed in the heat source inlet of the heat pump in order to protect the evaporator against conta- mination.

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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