{"product_id":"viessmann-juego-ampliacion-circuito-mezcladora-km-bus","title":"Viessmann extension kit for a mixing valve circuit (KM-BUS, Vitotronic 200)","description":"\u003ch2\u003eExtension kit for a heating circuit with mixing valve on Vitotronic 200 control units\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eViessmann extension kit\u003c\/strong\u003e is the electronics that lets the \u003cstrong\u003eVitotronic 200\u003c\/strong\u003e control unit run a circuit with a mixing valve, for example underfloor heating alongside radiators. It connects over the \u003cstrong\u003eKM-BUS\u003c\/strong\u003e and comes with its flow temperature sensor.\u003c\/p\u003e\n\u003ch3\u003eSummary\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eMixing valve circuit electronics, KM-BUS subscriber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand and model\u003c\/th\u003e\n\u003ctd\u003eViessmann, 2 models: ZK02940 (with actuator) and ZK02941 (for separate actuator)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUse\u003c\/th\u003e\n\u003ctd\u003eControlling a heating circuit with mixing valve from the Vitotronic 200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible with\u003c\/th\u003e\n\u003ctd\u003e\n\u003ca href=\"\/en-en\/products\/caldera-de-gasoil-vitorondens-200t-br2a-viessmann\" title=\"Vitorondens 200-T BR2A\"\u003eVitorondens 200-T BR2A\u003c\/a\u003e and \u003ca href=\"\/en-en\/products\/viessmann-vitorondens-200-t-j2ra-oil-condensing-boiler\" title=\"Vitorondens 200-T J2RA\"\u003eJ2RA\u003c\/a\u003e with Vitotronic 200 KO2B; \u003ca href=\"\/en-en\/products\/viessmann-vitodens-200-w-b2ha-gas-condensing-boiler-49-99-kw\" title=\"Vitodens 200-W B2HA\"\u003eVitodens 200-W B2HA\u003c\/a\u003e with Vitotronic 200 HO1B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQ-Tech installation\u003c\/th\u003e\n\u003ctd\u003eFitted and wired in a \u003ca href=\"\/en-en\/pages\/pre-montaje-avanzado\" title=\"Advanced pre-assembly of plant rooms\"\u003epre-assembled plant room\u003c\/a\u003e or on-site by an Expert Technician\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTechnical data\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eData\u003c\/th\u003e\n\u003cth\u003eZK02940, with actuator\u003c\/th\u003e\n\u003cth\u003eZK02941, for separate actuator\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eDirectly on the Viessmann mixing valve\u003c\/td\u003e\n\u003ctd\u003eOn the wall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eActuator\u003c\/th\u003e\n\u003ctd\u003eIntegrated: 3 Nm torque, 120 s per 90°\u003c\/td\u003e\n\u003ctd\u003eNot included: 230 V~, 120 s per 90°, reversible direction of rotation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower supply\u003c\/th\u003e\n\u003ctd\u003e230 V~, 50 Hz\u003c\/td\u003e\n\u003ctd\u003e230 V~, 50 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCommunication\u003c\/th\u003e\n\u003ctd\u003eKM-BUS\u003c\/td\u003e\n\u003ctd\u003eKM-BUS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlow temperature sensor\u003c\/th\u003e\n\u003ctd\u003eContact type, NTC 10 kΩ, 2 m cable\u003c\/td\u003e\n\u003ctd\u003eContact type, NTC 10 kΩ, 5.8 m cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePump relay\u003c\/th\u003e\n\u003ctd\u003e2(1) A, 230 V~\u003c\/td\u003e\n\u003ctd\u003e2(1) A, 230 V~\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProtection\u003c\/th\u003e\n\u003ctd\u003eIP 32 D\u003c\/td\u003e\n\u003ctd\u003eIP 32 D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eViessmann list price (excluding VAT)\u003c\/th\u003e\n\u003ctd\u003e€691\u003c\/td\u003e\n\u003ctd\u003e€454\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eSources: Viessmann price list of September 2026 (p. 131) and Viessmann planning instructions for the Vitorondens 200-T and the Vitodens 200-W B2HA.\u003c\/p\u003e\n\u003ch3\u003eCompatibility and limits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOnly with the \u003cstrong\u003eVitotronic 200\u003c\/strong\u003e control: the Vitotronic 100 handles a single circuit without mixing valve.\u003c\/li\u003e\n\u003cli\u003eThe Vitotronic 200 KO2B and HO1B handle one direct circuit and \u003cstrong\u003eup to two mixing valve circuits\u003c\/strong\u003e: one kit per mixed circuit.\u003c\/li\u003e\n\u003cli\u003eThe ZK02940 is for Viessmann mixing valves from DN 20 to DN 50 (R ½ to R 1¼), not for flanged mixing valves.\u003c\/li\u003e\n\u003cli\u003eIf you fit a \u003ca href=\"\/en-en\/products\/viessmann-divicon-pump-group-mixed-circuit-one-base\" title=\"Divicon with mixing valve\"\u003eDivicon with mixing valve in the KM-Bus version\u003c\/a\u003e, the extension kit is already included in the Divicon.\u003c\/li\u003e\n\u003cli\u003eInstallation requires a licensed installation company.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhich one should I choose?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eZK02940\u003c\/strong\u003e if the mixing valve is a Viessmann one: it comes with the actuator. The \u003cstrong\u003eZK02941\u003c\/strong\u003e if you already have a 230 V actuator from another brand.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it work with a current wall-hung Vitodens 100-W, 111-W or 200-W?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Those boilers use PlusBus and their ADIO EM-MX or EM-M1 extensions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the delivery time?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is in stock at our warehouse.\u003c\/p\u003e\n\u003ch3\u003eDocumentation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.viessmann.es\/es\/productos\/calderas-de-gasoleo\/vitorondens-200-t.html\" target=\"_blank\" rel=\"noopener\" title=\"Vitorondens 200-T on viessmann.es\"\u003eOfficial Vitorondens 200-T page at Viessmann Spain\u003c\/a\u003e (in Spanish).\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/vibooks.viessmann-climatesolutions.com\/es\/es\" target=\"_blank\" rel=\"noopener\" title=\"Viessmann Vibooks\"\u003eViessmann Vibooks\u003c\/a\u003e, with installation instructions by reference (in Spanish).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"qt-nota-stock\"\u003e\u003cstrong\u003eAvailability and lead times:\u003c\/strong\u003e this item is in stock at our warehouse. Occasionally, depending on the time of year, the stock update may contain an error. If no units are available when you place your order, we will order it urgently and inform you immediately of the updated delivery time.\u003c\/p\u003e","brand":"Viessmann","offers":[{"title":"With actuator, on the mixing valve","offer_id":59070465376600,"sku":"VI-ZK02940","price":678.3,"currency_code":"EUR","in_stock":true},{"title":"For separate actuator, wall-mounted","offer_id":59070465409368,"sku":"VI-ZK02941","price":445.66,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0015\/4592\/8792\/files\/viessmann-juego-ampliacion-mezcladora-zk02940.webp?v=1794142881","url":"https:\/\/q-tech.es\/en-en\/products\/viessmann-mixing-valve-circuit-extension-kit-km-bus","provider":"Q-Tech ® ","version":"1.0","type":"link"}