Vaillant aroTHERM VWL ../2 A 230 V series Installation Instructions Manual

Maintenance 70020147164_07 aroTHERM Installation instructions 25You can read the flow rate directly from the controller. De-pending on the type of liquid in the heating circuit, the flowrate displayed on the controller may be exaggerated.Example: If you use a 30% mixture of propylene glycol andthe liquid temperature is 5 °C, you must subtract 400 l/h fromthe value shown on the display.▶ Use the following table to compare the various exaggera-tion flow rate values depending on liquid type.– Applies for: VWL 55/2 A 230 V,VWL 85/2 A 230 V,VWL 115/2 A 230 VFlow rate increase (l/h) Temper-ature5 °CTemper-ature15 °CTemper-ature25 °CLiquidtypeWater 0 0 060% alcohol 0 0 030% propyleneglycol400 240 12050% propyleneglycol650 500 40030% ethyleneglycol120 0 050% ethyleneglycol400 140 50– Applies for: VWL 155/2 A 230 VFlow rate increase (l/h) Temper-ature5 °CTemper-ature15 °CTemper-ature25 °CLiquidtypeWater 0 0 060% alcohol 0 0 030% propyleneglycol600 440 28050% propyleneglycol1050 740 58030% ethyleneglycol520 350 30050% ethyleneglycol880 680 540NoteInsufficient purging may lead to deviations in theflow rate.▶ If you cannot reach the minimum flow rate, install an ad-ditional pump.▶ If you cannot reach the recommended flow rate, adjustthe heating circuit pressure on the controller and, if ne-cessary, use a bypass valve (item 50).6.12.3 Adapting the unit to the heating installationThe installation assistant is launched when the product isswitched on for the first time.If you have already filled the heating installation and termin-ated the installation assistant, but want to set the most im-portant system parameters again, you can also call up theConfiguration menu point.Menu → Installer level Configuration6.12.3.1 Heat pump setting parametersTo individually set the heat pump, you can adjust certainparameters in the Configuration menu.Menu → Installer level ConfigurationAdditional setting data is listed in the appendix.Heat pump setting parameters (→ Page 33)6.13 Installing the side claddingCCBA▶ Install the side cladding.6.14 Instructing the operator1. Explain the how the system operates to the operator.2. Draw particular attention to the safety information,which the operator must follow.3. Make the operator aware of the need for regular main-tenance (maintenance contract).4. Explain to the operator how to check the system's watervolume/filling pressure.7 Maintenance7.1 Observing maintenance intervals1. Only carry out maintenance work if you are a competentperson.2. Carry out annual maintenance.