Samsung AE090MNYDEH Installation Manual

Also see for AE090MNYDEH: User manual User manual Service manual Service manual

21INSTALLATIONEnglishSetting the pre-pressure of the expansion vesselWhen it is required to change the default pre-pressure of the expansion vessel(1 bar), keep in mind the following guidelines:• Use only dry nitrogen to set the expansion vessel pre-pressure.• Inappropriate setting of the expansion vessel pre-pressure will lead to malfunction of the system. Therefore, the pre-pressureshould only be adjusted by a licensed installer.[Lit]50 100 150 200 250 300 350 40014.0012.0010.008.006.004.002.000.00Water volume (Litre) in total system including pipesOperation rangeNorminalExpansion Vessel capacity (Liter)CAUTION• Water volume of total system for reliable performance is minimum 50 liters.Installation heightdifferencea)Water volume< 220 Litres > 220 Litres< 7 m No pre-pressure adjustment required.Actions required:• Pre-pressure must be decreased, calculateaccording to “Calculating the pre-pressureof the expansion vessel”.• Check if the water volume is lower thanmaximum allowed water volume> 7 mActions required:• Pre-pressure must be increased, calculatethe appropriate value following by“Calculating the pre-pressure of theexpansion vessel”.• Check if the water volume is lower thanmaximum allowed water volumeExpansion vessel of the unit too small for theinstallation.a) Installation height difference: height difference(m) between the highest point of the water circuit and the indoor unit. If theindoor unit is located at the highest point of the installation, the installation height is considered 0 m.Calculating the pre-pressure of the expansion vesselThe pre-pressure(Pg) to be set depends on the maximum installation height difference(H) and is calculated as below:Pg=(H/10+0.3) bar