Vaillant VWL 57/5 IS Operating, Installation And Maintenance Instructions

Also see for VWL 105/5 AS S2: Operating instructions Operating instructions Operating instructions

Contents

3 Product description20 Installation and maintenance instructions Hydraulic station 0020257319_0223 hours, are switched on for 10–20 seconds, one after theother.3.2.5 Safety cut-out (SCO) in the heating circuitIf the temperature in the heating circuit of the internal elec-tric back-up heater exceeds the maximum temperature, thesafety cut-out shuts down the electric back-up heater as asecuring measure. After it is triggered, the safety cut-outmust be replaced.– Max. heating circuit temperature: 95 ℃3.3 Cooling modeDepending on the country, the product has the heating modeor heating and cooling mode function.An optional accessory can be used to subsequently activatethe cooling mode.3.4 Functions of the heat pumpThe heat pump has a closed refrigerant circuit in which refri-gerant circulates.In heating mode, cyclic evaporation, compression, liquefac-tion and expansion take in heat energy from the surround-ings and transfer it to the building. In cooling mode, heatenergy is extracted from the building and released into theenvironment.3.4.1 Operating principle, heating mode6543121 Evaporator (heat ex-changer)2 4-port diverter valve3 Fan4 Compressor5 Expansion valve6 Condenser (heat ex-changer)3.4.2 Operating principle, cooling modeApplicability: Product with cooling mode6543121 Condenser (heat ex-changer)2 4-port diverter valve3 Fan4 Compressor5 Expansion valve6 Evaporator (heat ex-changer)3.5 Description of the productThe product is the indoor unit of an air-to-water heat pumpwith split technology.The indoor unit is connected to the outdoor unit via the refri-gerant circuit.3.6 Product overview3.6.1 Product design6451231 Unit mounting bracket 2 Expansion vessel