Appendix0020257319_02 Hydraulic station Installation and maintenance instructions 63VWL 57/5 IS VWL 77/5 IS VWL 127/5 ISRemaining feed head ΔT 5 K with12 kW outdoor unit51.5 kPa(515.0 mbar)Remaining feed head ΔT 8 K with3 kW outdoor unit71 kPa(710 mbar)Remaining feed head ΔT 8 K with5 kW outdoor unit68 kPa(680 mbar)Remaining feed head ΔT 8 K 73 kPa(730 mbar)Remaining feed head ΔT 8 K with10 kW outdoor unit82 kPa(820 mbar)Remaining feed head ΔT 8 K with12 kW outdoor unit81 kPa(810 mbar)Min. volume flow during continu-ous operation at the operating lim-its with a 3 kW outdoor unit0.3 m³/hMin. volume flow during continu-ous operation at the operating lim-its with a 5 kW outdoor unit0.4 m³/hMin. volume flow during continu-ous operation at the operating lim-its0.55 m³/hMin. volume flow during continu-ous operation at the operating lim-its with a 10 kW outdoor unit1.13 m³/hMin. volume flow during continu-ous operation at the operating lim-its with a 12 kW outdoor unit1.18 m³/hMax. volume flow during continu-ous operation at the operating lim-its with a 3 kW outdoor unit0.54 m³/hMax. volume flow during continu-ous operation at the operating lim-its with a 5 kW outdoor unit0.79 m³/hMax. volume flow during continu-ous operation at the operating lim-its1.08 m³/hMax. volume flow during continu-ous operation at the operating lim-its with a 10 kW outdoor unit1.7 m³/hMax. volume flow during continu-ous operation at the operating lim-its with a 12 kW outdoor unit1.8 m³/hPump type High-efficiency pump High-efficiency pump High-efficiency pumpEnergy efficiency index (EEI) ofthe pump≤0.2 ≤0.2 ≤ 0.23Technical data – ElectricsVWL 57/5 IS VWL 77/5 IS VWL 127/5 ISMin. electrical power consumptionof the heating pump2 W 2 W 3 WMax. electrical power consump-tion of the heating pump60 W 60 W 100 WElectrical power consumption ofthe heating pump at A7/35 ΔT 5 Kwith an external pressure loss of250 mbar in the heating circuit20 W 20 W 40 WTechnical data – Refrigerant circuitVWL 57/5 IS VWL 77/5 IS VWL 127/5 ISMaterial, refrigerant pipe Copper Copper CopperLength, refrigerant pipe, maximum 25 m 25 m 25 m