{"product_id":"vaillant-heat-pump-control-module-interface-vwz-ai-for-arotherm-v2","title":"Vaillant Heat Pump Control Module Interface VWZ AI - For AroTHERM v2","description":"\u003cdiv style=\"font-size:16px; max-width:900px; font-family:Arial, Helvetica, sans-serif; color:#222222; line-height:1.6;\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eVaillant Heat Pump Control Module Interface (VWZ AI)\u003c\/strong\u003e is the standard appliance-level controller for the \u003cstrong\u003eVaillant aroTHERM plus v2\u003c\/strong\u003e heat pump range, designed to be installed directly with the outdoor unit to manage heating and domestic hot water generation. The unit features a \u003cstrong\u003edigital display and soft-key control panel\u003c\/strong\u003e that shows the daily environmental energy yield, current operating mode, and system fault or maintenance messages at a glance, with menu-driven access to operating hours, filling pressure, and set-point adjustments.\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; gap:10px; margin:20px 0;\"\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:14px 10px; text-align:center;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e174 x 272 x 52mm\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.9;\"\u003eDimensions\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:14px 10px; text-align:center;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eDigital\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.9;\"\u003eDaily Energy Yield Display\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:14px 10px; text-align:center;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e2\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.9;\"\u003eSoft-Key Selection Buttons\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:14px 10px; text-align:center;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e0.1–0.15 MPa\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.9;\"\u003eNormal Filling Pressure Range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:14px 10px; text-align:center;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e70°C\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.9;\"\u003eMax Cylinder Temp (Compressor)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:14px 10px; text-align:center;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e8000044872\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.9;\"\u003eVaillant Product Code\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"border-left:4px solid #008377CF; background:#E6F6F5; padding:12px 16px; margin:16px 0; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:4px;\"\u003eCompatible With aroTHERM plus v2 (VWL ..5\/6 A)\u003c\/div\u003e\n\u003cdiv style=\"color:#333333;\"\u003eThe VWZ AI is intended for use exclusively with the \u003cstrong\u003eVWL ..5\/6 A\u003c\/strong\u003e outdoor heat pump unit range as its heat pump control module, in conjunction with an optional system control such as the sensoCOMFORT for full time-programme and multi-zone functionality.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:4px solid #B3261E; background:#FDECEA; padding:12px 16px; margin:16px 0; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#B3261E; margin-bottom:4px;\"\u003eLegionella Protection Requires Correct Set Points\u003c\/div\u003e\n\u003cdiv style=\"color:#333333;\"\u003eLegionella bacteria multiply at temperatures below \u003cstrong\u003e60°C\u003c\/strong\u003e. Where no system control is connected, Vaillant specify a target cylinder temperature of \u003cstrong\u003e65°C\u003c\/strong\u003e with the electric back-up heater enabled for domestic hot water, to reliably achieve 60°C at outdoor temperatures below -10°C or above +30°C. Do not set water temperatures below 60°C without consulting a competent person first.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:4px solid #946200; background:#FFF4DE; padding:12px 16px; margin:16px 0; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#946200; margin-bottom:4px;\"\u003eTime-Programmed Anti-Legionella Requires a System Control\u003c\/div\u003e\n\u003cdiv style=\"color:#333333;\"\u003eThe anti-legionella function's time programme is \u003cstrong\u003eonly available when a system control is connected\u003c\/strong\u003e. Without one, the target cylinder temperature must be set higher (65°C) to compensate, as no scheduled anti-legionella cycle can run from the VWZ AI alone.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display:flex; flex-wrap:wrap; gap:12px; margin:20px 0;\"\u003e\n\u003cdiv style=\"flex:1; min-width:250px; border:1px solid #e0e0e0; border-radius:8px; padding:16px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px;\"\u003eAt-a-Glance Energy Yield Display\u003c\/div\u003e\n\u003cdiv style=\"color:#333333; font-size:14px; line-height:1.5;\"\u003eThe central display shows the \u003cstrong\u003edaily environmental energy yield\u003c\/strong\u003e directly on the basic screen, giving installers and homeowners immediate visibility of system performance without navigating menus.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:250px; border:1px solid #e0e0e0; border-radius:8px; padding:16px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px;\"\u003eBuilt-In Safety Devices\u003c\/div\u003e\n\u003cdiv style=\"color:#333333; font-size:14px; line-height:1.5;\"\u003eIncludes \u003cstrong\u003efrost protection\u003c\/strong\u003e, \u003cstrong\u003elow-water pressure protection\u003c\/strong\u003e, \u003cstrong\u003efreeze protection\u003c\/strong\u003e (activating the compressor if heating flow temperature drops below 4°C), and \u003cstrong\u003epump blocking protection\u003c\/strong\u003e that exercises idle pumps every 23 hours.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:250px; border:1px solid #e0e0e0; border-radius:8px; padding:16px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px;\"\u003eDigital Filling Pressure Monitoring\u003c\/div\u003e\n\u003cdiv style=\"color:#333333; font-size:14px; line-height:1.5;\"\u003eA built-in pressure sensor continuously monitors the heating installation's filling pressure, displaying it digitally and raising fault message \u003cstrong\u003eF.22\u003c\/strong\u003e if pressure falls below 0.05 MPa (0.5 bar) for more than one minute.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:250px; border:1px solid #e0e0e0; border-radius:8px; padding:16px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px;\"\u003eRetrofit-Friendly Design\u003c\/div\u003e\n\u003cdiv style=\"color:#333333; font-size:14px; line-height:1.5;\"\u003eDesigned to be seamlessly retrofitted into existing Vaillant aroTHERM installations, simplifying control upgrades without requiring a full system controller replacement.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:250px; border:1px solid #e0e0e0; border-radius:8px; padding:16px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px;\"\u003eTwo Operating Levels\u003c\/div\u003e\n\u003cdiv style=\"color:#333333; font-size:14px; line-height:1.5;\"\u003eSeparates the \u003cstrong\u003eend-user operating level\u003c\/strong\u003e (essential information and basic set points) from a \u003cstrong\u003ecode-protected competent-person level\u003c\/strong\u003e reserved for installer configuration and diagnostics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:250px; border:1px solid #e0e0e0; border-radius:8px; padding:16px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px;\"\u003eDetailed Operating Statistics\u003c\/div\u003e\n\u003cdiv style=\"color:#333333; font-size:14px; line-height:1.5;\"\u003eDisplays total operating hours broken down by \u003cstrong\u003eheating mode, domestic hot water mode, and cooling mode\u003c\/strong\u003e, supporting maintenance planning and performance tracking over the system's lifetime.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specification\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; margin:20px 0; font-size:14px;\"\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#ffffff; font-weight:700; padding:8px 12px;\"\u003eProduct Identification\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003eProduct Name\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eVWZ AI Heat Pump Appliance Interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f4f4f4;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003eVaillant Product Code\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003e8000044872\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003eCompatible Heat Pump Range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003earoTHERM plus v2 (VWL ..5\/6 A outdoor units)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#ffffff; font-weight:700; padding:8px 12px;\"\u003ePhysical\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#f4f4f4;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003eDimensions (H x W x D)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003e174mm x 272mm x 52mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003eInstallation Location\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eDry rooms only – moisture may damage the electronics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#ffffff; font-weight:700; padding:8px 12px;\"\u003eControl \u0026amp; Display\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#f4f4f4;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003eDisplay Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eDigital display with soft-key selection buttons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003eBasic Display Timeout\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eBacklight switches off after 1 minute of inactivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f4f4f4;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003eMenu Timeout\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eReturns to basic display after 15 minutes of inactivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003eReset Function\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eDedicated reset button on control panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#ffffff; font-weight:700; padding:8px 12px;\"\u003eOperating Parameters\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#f4f4f4;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003eNormal Filling Pressure Range (cold)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003e0.1 MPa to 0.15 MPa (1.0 to 1.5 bar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003eLow Pressure Warning (M32)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eBelow 0.07 MPa (0.7 bar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f4f4f4;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003eLow Pressure Fault (F.22)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eBelow 0.05 MPa (0.5 bar) for over 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003eFreeze Protection Trigger\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eHeating flow temperature below 4°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f4f4f4;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003ePump Blocking Protection Interval\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eEvery 23 hours of inactivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:45%;\"\u003eMax Cylinder Temperature (compressor only)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eUp to 70°C, depending on environmental energy source\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv style=\"margin:20px 0;\"\u003e\n\u003cdetails style=\"margin-bottom:8px; border:1px solid #e0e0e0; border-radius:6px; overflow:hidden;\"\u003e\n\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; font-weight:600; cursor:pointer; list-style:none;\"\u003eWhich heat pumps is the VWZ AI compatible with?\u003c\/summary\u003e\n\u003cdiv style=\"padding:12px 14px; color:#333333; font-size:14px; line-height:1.5;\"\u003eThe VWZ AI is designed for use with the \u003cstrong\u003eVaillant aroTHERM plus v2\u003c\/strong\u003e outdoor units in the VWL ..5\/6 A range, as specified in Vaillant's own system installation instructions.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom:8px; border:1px solid #e0e0e0; border-radius:6px; overflow:hidden;\"\u003e\n\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; font-weight:600; cursor:pointer; list-style:none;\"\u003eDoes the VWZ AI include a system controller for multiple heating zones?\u003c\/summary\u003e\n\u003cdiv style=\"padding:12px 14px; color:#333333; font-size:14px; line-height:1.5;\"\u003eNo. The VWZ AI is the \u003cstrong\u003eheat pump appliance interface\u003c\/strong\u003e, providing essential display, monitoring and basic set-point control at the heat pump itself. For time programmes, multi-zone control and full anti-legionella scheduling, an additional system control (such as a sensoCOMFORT) should be connected.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom:8px; border:1px solid #e0e0e0; border-radius:6px; overflow:hidden;\"\u003e\n\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; font-weight:600; cursor:pointer; list-style:none;\"\u003eWhat happens if no system control is connected?\u003c\/summary\u003e\n\u003cdiv style=\"padding:12px 14px; color:#333333; font-size:14px; line-height:1.5;\"\u003eWithout a system control, the anti-legionella function's \u003cstrong\u003etime programme is unavailable\u003c\/strong\u003e, so Vaillant recommend setting the target cylinder temperature to 65°C (with the electric back-up heater enabled) to maintain adequate legionella protection instead.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom:8px; border:1px solid #e0e0e0; border-radius:6px; overflow:hidden;\"\u003e\n\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; font-weight:600; cursor:pointer; list-style:none;\"\u003eHow do I check the heating system's filling pressure?\u003c\/summary\u003e\n\u003cdiv style=\"padding:12px 14px; color:#333333; font-size:14px; line-height:1.5;\"\u003eThe current filling pressure can be viewed via \u003cstrong\u003eMenu → Live Monitor → Building circuit pressure\u003c\/strong\u003e directly on the VWZ AI display.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom:8px; border:1px solid #e0e0e0; border-radius:6px; overflow:hidden;\"\u003e\n\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; font-weight:600; cursor:pointer; list-style:none;\"\u003eWhat does fault code F.22 mean?\u003c\/summary\u003e\n\u003cdiv style=\"padding:12px 14px; color:#333333; font-size:14px; line-height:1.5;\"\u003eF.22 indicates the heating installation's filling pressure has fallen below \u003cstrong\u003e0.05 MPa (0.5 bar)\u003c\/strong\u003e for more than one minute. A competent person should investigate and top up the system as required.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Vaillant","offers":[{"title":"Default Title","offer_id":65281211072861,"sku":"8000044872","price":295.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/HeatPumpControlModuleInterfaceVWZAI-ForAroTHERMv2.jpg?v=1784287416","url":"https:\/\/qualityheating.co.uk\/products\/vaillant-heat-pump-control-module-interface-vwz-ai-for-arotherm-v2","provider":"AIZO Quality Heating","version":"1.0","type":"link"}