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

5 Assembly and installation16 Installation instructions aroTHERM 0020147164_07Installation without decoupling hydraulic module– Drain cock– Air separator (if required)– Dirt filter– An expansion vessel suitable for the complete hydraulicinstallation– Expansion relief valve 0.3 MPa (3 bar)– Pressure gauge (recommended)NoteIf you use glycol, you must collect it at theexpansion relief valve to prevent environ-mental pollution.NoteImproper purging of the heating circuit maycause pump faults due to a low flow rate(F.532).0.75 m min.7319 624581 Connection hose inthe heating flow to thebuilding (on-site)2 O-ring seal3 Covering cap4 Heating flow connection(diameter 1 1/4") to thebuilding5 Heating return connec-tion (diameter 1 1/4") tothe heat pump6 Connection hose in theheating return to theheat pump (on-site)7 Insulation (on-site)8 Stop valve9 Dirt filter5. Remove the covering caps (3) from the product's hy-draulic connections.6. Install a dirt filter (9) in the heating circuit returnbetween two stop valves (8) so that the filter can becleaned regularly.7. Install a flexible connection pipe (1) and (6) (to beprovided on-site) with an O-ring and a stop valve toeach of the connections for the heat pump heating flowand return.8. Check the connections for tightness.5.3.2 Connecting the swimming pool (optional)Danger!Risk of material damage due to a directconnection to a swimming pool.If the product is directly connected to a swim-ming pool, damage may be caused by corro-sion.▶ Do not connect the heat pump heatingcircuit directly to a swimming pool.▶ If you want to connect a swimming pool to the heatingcircuit, note the components (expansion vessels, etc.)that are required for the installation.5.3.3 Connecting the condensate drain pipeworkNoteObserve all valid national regulations and rules.