Vaillant aquaPlus Instructions For Installation And Servicing

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Vaillant aquaPlus Instructions For Installation And Servicing Manual pdf 12 page image

4 General Requirements4.9.6 Expansion vesselThe aquaPLUS incorporates a 10 litre expansion vesselwhich is suitable for a sealed heating system with amaximum water content of 100 litres.If the nominal capacity of the built in expansion vessel isnot sufficient for the heating system (for instance incase of modernization of old open systems) anadditional expansion vessel can be installed external tothe boiler. It should be fitted in the return pipe as closeas possible to the boiler in accordance with BS 5449:Part 1.Guidance on the sizing of an additional expansion vesselis given in Table 4.1.4.9.7 Pump specificationsFig. 4.5: Pump specifications4.9.8 Circulating pumpThe circulating pump is included in the boiler. The pumphead available for the boiler is shown in Fig. 4.5.4.9.9 System by-passAn automatic system by-pass is included within theboiler. The boiler is suitable for use in systems withthermostatic radiator valves and no additional by-passis required.4.9.10 VentingThe boiler is fitted with an automatic air vent. Additionalprovision should be made to enable the heating systemto be vented during filling and commissioning either byautomatic air vents or manually.0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 140050100150200250300350400450500550600650700Volume flow [l/min]Lift [mbar]Pump switch in position III (pre-delivery setting)Pump switch in position II1500 1600 1700Instructions for installation and servicing aquaPLUS VUI 362-712Vessel Volume [L]Initial system pressure (bar) 1.0 1.5Pressure relief valve setting (bar) 3.0Total water content of systemlitres25 2.7 3.950 5.4 7.8100 10.9 15.6125 13.619.5150 16.3 23.4175 19.1 27.3200 21.8 31.2225 24.5 35.1250 27.2 39.0275 30.0 42.9300 32.7 46.8325 35.7 50.7350 38.1 54.6375 40.9 58.5400 43.662.4425 46.3 66.3450 49.0 70.2475 51.8 74.1500 54.5 78.0For system volumes other than 0.109 0.156those given above, multiply thesystem volume by the factor acrossTable 4.1: Sizing of additional expansion vesselSupplied by HeatingSpares247.com