In case of risk related to icing formed inside condensate drain, piping shall be fitted with dedicated
heating system. Heat pump condensate shall be discharged with the pipe protected against freezing,
alternately the pipe fitted with heating. Note that discharge pipe gradient size shall be appropriate to
prevent any blockage. Condensate shall be discharged into gravel or stone subbase or into storm-water
runoff effluent.
Connection to heating system
Flushing is required of heating circuits before pump connection.
Any contamination and deposits inside heating circuit may cause poor operation of heat pump.
Central heating outlet (supply) and central heating inlet (return) shall be provided with
cut-off valve on the side of heat pump.
Connect the device to heating system according to hydraulic diagram.
Check heating system pipes regarding size and length and type
(including pipes between heat pump and building).
Protect heat pump connection against over-tightening to prevent damage of device
internal connections. Firstly supply pipe shall be connected and then return one.
Quality of water
Heating water have impact on system performance, but also on service life of heating device and
other components of heating system. Therefore always follow guidelines indicated in VDI 2035 part I
and II. According to our experience, use of desalted water enables to ensure safe and reliable operation.
VDI 2035 part I includes guidelines and recommendations regarding protection against scale
deposits inside heating system and domestic hot water systems. VDI 2035 part II includes mostly
indications regarding protection against heating water corrosive action inside domestic hot water
system. To mitigate risk related to scale and corrosion inside domestic hot water/central heating
system, it is required to:
Ensure that design and pre-commissioning is performed by professionals only;
Ensure that system is protected against exposure to external corrosive agents;
Provide system with equipment of appropriate size and compensating pressure;
Adhere closely to standards regarding heating water parameters;
Perform maintenance inspections and checks on regular basis.
Glycol
Glycol solution shall be prepared according to instructions provided by glycol’s supplier. Glycol is
required for cooling and failure to adhere to supplier’s instructions voids manufacturer’s guarantee. Use of
glycol results in output decrease ca. 10 - 15 %. To reduce output decrease, it is recommended to increase
medium flow by ca. 10%. Also it is recommended to use ca. 15 - 30% Propylene glycol solution.
Operation Manual and Guarantee Card v.010
HKS LAZAR Sp.z o.o. ul. Wodzisławska 15B 44-335 Jastrzębie-Zdrój
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