Reflex - Coral Instal

Pressurisation Systems Diaphragm Expansion VesselsPressurisation SystemsSelecting Variomat control unitsFor cooling water systems up to 30 °C, only50 % of the nominal heat output is to beconsidered when selecting the control unitIn the green range of outputs ≤ 500 kW andVn < 200 litres, we recommend using ReflexServitec + Reflex insteadMinimum operating pressure p0/barPerm. operating temperature 70 °CHeight x Width x Depth 304 x 291 x 91 mmp0barVariomat 1, Variomat 2-1Control unit with 1 pumpIn output ranges > 2 MW we recommendusing two-pump systemsVariomat 2-1/95*Variomat 2-1/75*p0barVariomat 2-2Control unit with 2 pumpsPer pump and overflow valve50 % of the total outputVariomat 2-2/95*Variomat 2-2/75*0.2 bar [≤ 100 °C]Variomat 2-1/60Variomat 2-2/60p0 ≥ H[m]10 + 0.5 bar [ 105 °C]0.7 bar [ 110 °C]1.2 bar [ 120 °C]Variomat 2-2/35Safety temperatureH = static heightVariomat 1p0 = 1.3 barmin. setting valuefor continuousdeaeration modep0 = 1.3 barmin. setting valuefor continuousdeaeration modeQ /MWTotal heat output of heat generation systemQ /MWVariomat basic and secondary vessel selectionNominal volume VnApproximate from diagram or calculationaccording to formulaVnLitresBasic and secondary vesselsGuideline values for 90/70 °CHeating systems0.031 [ 70 °C]6 l/kW convectorsVn ≥ VA x0.045 [ 90 °C]0.054 [ 100 °C]0.063 [ 110 °C]System flow temperatureVn = Nominal volumeVA = Water content in the systemThe nominal volume can can be distributedacross multiple vessels (VG basicand VF secondary vessels).Selection example20 l/kW13.5 l/kW radiatorsInstalled heat performance in heating surfaces- Output of heat generator Q = 1000 kW- Water content VA = unknown→ Approximate from the installedheating output Q = 1000 kW, radiators,90/70 °C, no additional pipelines- Design temperature = 90 °C- Safety temperature = 110 °C- Static height = 25 m→ p0 ≥H [m]bar + 0.7 bar [110 °C]1025p0 ≥ bar + 0.7 bar = 3.2 bar108.5 l/kW plates/ventilation1 2 3 4Q /MWSelected:Variomat 2-1/60 control unit+ Basic vessel 600 → p. 37+ Reflex Fillset → p. 47+ Connection set → p. 38– We recommend two-pumpsystems from 2 MW– The secondary vessel doesnot require any thermal insulation→ Vn from diagram= 600 litres40