{"product_id":"grupo-de-carga-esbe-ltc300-con-bomba","title":"ESBE LTC300 load unit with high-efficiency pump for biomass boilers","description":"\u003ch2\u003eESBE LTC300 load unit with high-efficiency pump for biomass boilers\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eESBE LTC300\u003c\/strong\u003e combines the thermostatic valve and the pump that load the accumulation tank and protect the \u003cstrong\u003esolid fuel boiler\u003c\/strong\u003e from cold return water in a single unit. At Q-Tech we integrate it in the \u003ca href=\"\/en-en\/pages\/pre-montaje-avanzado\"\u003epre-assembled plant room\u003c\/a\u003e, tested in our workshop before it reaches your site.\u003c\/p\u003e\n\u003ch3\u003eSummary\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003cth\u003eType\u003c\/th\u003e\u003ctd\u003eLoad unit with integrated thermostatic valve and pump\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eBrand and model\u003c\/th\u003e\u003ctd\u003eESBE LTC300 series (LTC361, 6 m pump)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eUse\u003c\/th\u003e\u003ctd\u003eLoading of accumulation tanks and return protection of solid fuel boilers, according to ESBE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eBoiler output\u003c\/th\u003e\u003ctd\u003e50 to 90 kW depending on the opening temperature and the temperature difference\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eOpening temperature\u003c\/th\u003e\u003ctd\u003e55, 60, 65 or 70 °C depending on the model\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eConnection\u003c\/th\u003e\u003ctd\u003eAdapters with G 1 (DN 25) or G 1¼ (DN 32) thread\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003ePower supply\u003c\/th\u003e\u003ctd\u003e230 V, 50 Hz; maximum consumption 43 W\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eQ-Tech installation\u003c\/th\u003e\u003ctd\u003eIntegrated and tested in the \u003ca href=\"\/en-en\/pages\/pre-montaje-avanzado\"\u003eQ-Tech pre-assembled plant room\u003c\/a\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eWhat is the ESBE LTC300?\u003c\/h3\u003e\n\u003cp\u003eThe ESBE LTC300 is a load unit with an \u003cstrong\u003eintegrated high-efficiency pump\u003c\/strong\u003e that keeps the boiler return temperature high over the whole combustion cycle, according to ESBE. The pump meets the EU directive on energy-related products, with an EEI below 0.20.\u003c\/p\u003e\n\u003ch3\u003eWhat problem does it solve?\u003c\/h3\u003e\n\u003cp\u003eWhen water returns cold to a solid fuel boiler, combustion does not reach its temperature and tar and condensation build up. ESBE states that a high, guaranteed return temperature gives higher efficiency, less tarring and a longer boiler life.\u003c\/p\u003e\n\u003cp\u003eWith a separate valve and pump, both have to be chosen, joined and adjusted on site. The LTC300 arrives as one unit, with \u003cstrong\u003eadjustable pump speed\u003c\/strong\u003e to optimise tank loading and an integrated venting function, according to ESBE.\u003c\/p\u003e\n\u003ch3\u003eTechnical data\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003cth\u003ePressure class\u003c\/th\u003e\u003ctd\u003ePN 6\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003ePower supply\u003c\/th\u003e\u003ctd\u003e230 V ±10%, 50 Hz; 3 m cable\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eMaximum consumption\u003c\/th\u003e\u003ctd\u003e43 W (LTC361)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003ePump energy efficiency index\u003c\/th\u003e\u003ctd\u003eEEI below 0.20; energy class A\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eLeakage\u003c\/th\u003e\u003ctd\u003eA to AB, maximum 0.5% of maximum flow; B to AB, maximum 3%\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eRangeability Kv to Kv minimum\u003c\/th\u003e\u003ctd\u003e100\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eMedia\u003c\/th\u003e\u003ctd\u003eHeating water to VDI 2035, water with up to 50% glycol and water with up to 28% ethanol\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eMedia temperature\u003c\/th\u003e\u003ctd\u003eFrom 0 to 110 °C\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eAmbient temperature\u003c\/th\u003e\u003ctd\u003eFrom 0 to 60 °C\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eConnections\u003c\/th\u003e\u003ctd\u003eInternal thread G (ISO 228-1)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eValve body material\u003c\/th\u003e\u003ctd\u003eNodular cast iron EN-JS 1050\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eConformity\u003c\/th\u003e\u003ctd\u003eCE marking: low voltage, electromagnetic compatibility, RoHS and ecodesign directives; pressure equipment, article 4.3\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eModels and data by variant\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003cth\u003eModel\u003c\/th\u003e\u003cth\u003eConnection\u003c\/th\u003e\u003cth\u003eOpening temperature\u003c\/th\u003e\u003cth\u003eMaximum boiler output (temperature difference)\u003c\/th\u003e\u003cth\u003eDimensions A, B, C and D\u003c\/th\u003e\u003cth\u003eNet weight\u003c\/th\u003e\u003cth\u003eReference\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLTC361 DN 25\u003c\/td\u003e\u003ctd\u003eG 1\u003c\/td\u003e\u003ctd\u003e55 °C ±5 °C\u003c\/td\u003e\u003ctd\u003e90 kW (35 °C)\u003c\/td\u003e\u003ctd\u003e213, 42, 212 and 118 mm\u003c\/td\u003e\u003ctd\u003e4.4 kg\u003c\/td\u003e\u003ctd\u003e55006000\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLTC361 DN 25\u003c\/td\u003e\u003ctd\u003eG 1\u003c\/td\u003e\u003ctd\u003e65 °C ±5 °C\u003c\/td\u003e\u003ctd\u003e65 kW (25 °C)\u003c\/td\u003e\u003ctd\u003e213, 42, 212 and 118 mm\u003c\/td\u003e\u003ctd\u003e4.4 kg\u003c\/td\u003e\u003ctd\u003e55006200\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLTC361 DN 25\u003c\/td\u003e\u003ctd\u003eG 1\u003c\/td\u003e\u003ctd\u003e70 °C ±5 °C\u003c\/td\u003e\u003ctd\u003e50 kW (20 °C)\u003c\/td\u003e\u003ctd\u003e213, 42, 212 and 118 mm\u003c\/td\u003e\u003ctd\u003e4.4 kg\u003c\/td\u003e\u003ctd\u003e55006300\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLTC361 DN 32\u003c\/td\u003e\u003ctd\u003eG 1¼\u003c\/td\u003e\u003ctd\u003e55 °C ±5 °C\u003c\/td\u003e\u003ctd\u003e90 kW (35 °C)\u003c\/td\u003e\u003ctd\u003e227, 42, 219 and 118 mm\u003c\/td\u003e\u003ctd\u003e4.6 kg\u003c\/td\u003e\u003ctd\u003e55006400\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLTC361 DN 32\u003c\/td\u003e\u003ctd\u003eG 1¼\u003c\/td\u003e\u003ctd\u003e60 °C ±5 °C\u003c\/td\u003e\u003ctd\u003e80 kW (30 °C)\u003c\/td\u003e\u003ctd\u003e227, 42, 219 and 118 mm\u003c\/td\u003e\u003ctd\u003e4.6 kg\u003c\/td\u003e\u003ctd\u003e55006500\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLTC361 DN 32\u003c\/td\u003e\u003ctd\u003eG 1¼\u003c\/td\u003e\u003ctd\u003e65 °C ±5 °C\u003c\/td\u003e\u003ctd\u003e65 kW (25 °C)\u003c\/td\u003e\u003ctd\u003e227, 42, 219 and 118 mm\u003c\/td\u003e\u003ctd\u003e4.6 kg\u003c\/td\u003e\u003ctd\u003e55006600\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLTC361 DN 32\u003c\/td\u003e\u003ctd\u003eG 1¼\u003c\/td\u003e\u003ctd\u003e70 °C ±5 °C\u003c\/td\u003e\u003ctd\u003e50 kW (20 °C)\u003c\/td\u003e\u003ctd\u003e227, 42, 219 and 118 mm\u003c\/td\u003e\u003ctd\u003e4.6 kg\u003c\/td\u003e\u003ctd\u003e55006700\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eCompatibility and limits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eOutput depends on the opening temperature\u003c\/strong\u003e: from 90 kW at 55 °C to 50 kW at 70 °C, according to ESBE.\u003c\/li\u003e\n\u003cli\u003ePressure class PN 6: check the maximum pressure of your system.\u003c\/li\u003e\n\u003cli\u003eA 230 V supply is needed for the pump.\u003c\/li\u003e\n\u003cli\u003eThe opening temperature is fixed; it is changed by replacing the thermostat with an \u003ca href=\"\/en-en\/products\/esbe-vtc951-replacement-thermostat\"\u003eESBE VTC951 thermostat\u003c\/a\u003e of another temperature.\u003c\/li\u003e\n\u003cli\u003eESBE offers optional LTC801 shut-off valves with adapters in several sizes, which are not in this listing.\u003c\/li\u003e\n\u003cli\u003eThe G 1 version at 60 °C is not available in this shop; choose the G 1¼ at 60 °C or the G 1 at 55 or 65 °C.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen this product is not the right choice\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003cth\u003eProduct\u003c\/th\u003e\u003cth\u003eWhen to choose it\u003c\/th\u003e\u003cth\u003eMaximum boiler output\u003c\/th\u003e\u003cth\u003ePump included\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003ca href=\"\/en-en\/products\/esbe-vtc300-thermostatic-load-valve\"\u003eESBE VTC300 load valve\u003c\/a\u003e\u003c\/td\u003e\u003ctd\u003eIf your boiler does not exceed 30 kW and already has a pump\u003c\/td\u003e\u003ctd\u003e30 kW\u003c\/td\u003e\u003ctd\u003eNo\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003ca href=\"\/en-en\/products\/esbe-vtc500-thermostatic-load-valve\"\u003eESBE VTC500 load valve\u003c\/a\u003e\u003c\/td\u003e\u003ctd\u003eIf your boiler exceeds 90 kW or you prefer to choose the pump separately\u003c\/td\u003e\u003ctd\u003e150 kW\u003c\/td\u003e\u003ctd\u003eNo\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhich model do I need?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe one that covers your boiler output at the return temperature your boiler manufacturer requires: at 55 °C it reaches 90 kW and at 70 °C, 50 kW. Send us your boiler data and we will tell you which unit to choose.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference from the VTC500 valve?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe LTC300 includes the high-efficiency pump; the VTC500 is only the valve and needs a separate pump.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the opening temperature be changed?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, by replacing the thermostat with an ESBE VTC951 of another temperature. ESBE has a video showing the change.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich pump does it have?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA 6 m high-efficiency pump with a maximum consumption of 43 W; ESBE sells it as a spare part under reference LTC934.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I install it myself?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is not recommended: it has hydraulic and electrical connections and should be installed by a professional, following ESBE's instructions. Q-Tech delivers it fitted in the plant room or installs it with an Expert Technician.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the delivery time?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe have it \u003cstrong\u003ein stock in Málaga\u003c\/strong\u003e and dispatch it as soon as we confirm your order.\u003c\/p\u003e\n\u003ch3\u003eQ-Tech installation and support\u003c\/h3\u003e\n\u003cp\u003eQ-Tech fits the LTC300 in the \u003ca href=\"\/en-en\/pages\/pre-montaje-avanzado\"\u003epre-assembled plant room\u003c\/a\u003e: assembled, wired and \u003cstrong\u003etested in our workshop\u003c\/strong\u003e, it arrives ready to connect to the boiler and the tank. You can book \u003ca href=\"\/en-en\/products\/tecnico-experto-pre-montaje-nave\"\u003eworkshop pre-assembly\u003c\/a\u003e, an \u003ca href=\"\/en-en\/products\/tecnico-experto-in-situ-horas\"\u003eon-site hourly Expert Technician\u003c\/a\u003e or a \u003ca href=\"\/en-en\/products\/expert-technician-remote-technical-call\"\u003etechnical call\u003c\/a\u003e to choose the model. See also our \u003ca href=\"\/en-en\/collections\/biomasa\"\u003ebiomass collection\u003c\/a\u003e or message us on \u003ca href=\"https:\/\/wa.me\/qtechhouses\" target=\"_blank\" rel=\"noopener\"\u003eWhatsApp\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eDocumentation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/esbe.eu\/storage\/56641E2B82BF6CC061077F4446ABFDC16200EAB91BD6C942411CF08E8E1C9B8E\/b7327b466eab44d98663ac3e8b740800\/pdf\/media\/f4a3025da75d4c468451ad13d30afa08\/LTC300_en_E_LR.pdf\" target=\"_blank\" rel=\"noopener\"\u003eESBE LTC300 series data sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/esbe.eu\/storage\/EA880F9571618427F3E6A2A3BDD0E6DE568A30212A0A9D8BC83C21D18B9F4B2B\/6e8b808e43bf4229850ba8da979170a5\/pdf\/media\/d3d8e9b692c24e3783b34831e65ad88e\/Anv_LTC300_98141077_versB_lr.pdf\" target=\"_blank\" rel=\"noopener\"\u003eLTC300 installation instructions (multilingual)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/esbe.eu\/storage\/E085D1F2B590A2B3DB1E0BDC0CF504F61534A6C1A5453370BEA54BF2113B9CF0\/f0baee582aa0456a87b5d5959ebe5a78\/pdf\/media\/6e55145a6df748469cdb75388ebb809c\/DoC_LTC300_A.pdf\" target=\"_blank\" rel=\"noopener\"\u003eDeclaration of conformity\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe src=\"https:\/\/www.youtube-nocookie.com\/embed\/21N1NgzlDzg\" title=\"Installing the ESBE LTC300 load unit (ESBE video)\" width=\"560\" height=\"315\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/p\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":"ESBE","offers":[{"title":"LTC361 G 1 · apertura 55 °C (55006000)","offer_id":59045910053208,"sku":"SE-CO10266","price":1309.29,"currency_code":"EUR","in_stock":true},{"title":"LTC361 G 1 · apertura 65 °C (55006200)","offer_id":59045910085976,"sku":"SE-CO10268","price":1309.29,"currency_code":"EUR","in_stock":true},{"title":"LTC361 G 1 · apertura 70 °C (55006300)","offer_id":59045910118744,"sku":"SE-CO10269","price":1309.29,"currency_code":"EUR","in_stock":true},{"title":"LTC361 G 1¼ · apertura 55 °C (55006400)","offer_id":59045910151512,"sku":"SE-CO10271","price":1340.7,"currency_code":"EUR","in_stock":true},{"title":"LTC361 G 1¼ · apertura 60 °C (55006500)","offer_id":59045910184280,"sku":"SE-CO10272","price":1340.7,"currency_code":"EUR","in_stock":true},{"title":"LTC361 G 1¼ · apertura 65 °C (55006600)","offer_id":59045910217048,"sku":"SE-CO10273","price":1340.7,"currency_code":"EUR","in_stock":true},{"title":"LTC361 G 1¼ · apertura 70 °C (55006700)","offer_id":59045910249816,"sku":"SE-CO10274","price":1340.7,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0015\/4592\/8792\/files\/esbe-ltc300-ltc361-grupo-carga-bomba.webp?v=1793878337","url":"https:\/\/q-tech.es\/en-int\/products\/esbe-ltc300-load-unit-with-pump","provider":"Q-Tech ® ","version":"1.0","type":"link"}