{"product_id":"tech-eu-21-cwu-pumpensteuerung-umwaelzpumpe","title":"TECH EU-21 CWU pump control circulation pump boiler boiler","description":"\u003cp data-start=\"866\" data-end=\"1127\"\u003eThe \u003cstrong data-start=\"870\" data-end=\"888\"\u003eTECH EU-21 CWU\u003c\/strong\u003e This is a compact controller for the automatic regulation of a circulation pump between the boiler and the storage tank or buffer tank. It operates based on temperature differences and reliably protects the system from unnecessary pump operation and frost.\u003c\/p\u003e  \u003chr data-start=\"1129\" data-end=\"1132\"\u003e  \u003ch2 data-start=\"1134\" data-end=\"1160\"\u003eHighlights\/Advantages\u003c\/h2\u003e  \u003cp data-start=\"1162\" data-end=\"1599\"\u003e⭐  \u003cstrong data-start=\"1164\" data-end=\"1196\"\u003eDifferential temperature control\u003c\/strong\u003e – Pump only runs when there is an actual need for heat\u003cbr data-start=\"1244\" data-end=\"1247\"\u003e⭐  \u003cstrong data-start=\"1249\" data-end=\"1276\"\u003eTwo temperature sensors\u003c\/strong\u003e – separate recording of boiler and storage tank\/buffer temperature\u003cbr data-start=\"1338\" data-end=\"1341\"\u003e⭐  \u003cstrong data-start=\"1343\" data-end=\"1377\"\u003eIntegrated frost protection function\u003c\/strong\u003e – automatic activation at low temperatures\u003cbr data-start=\"1431\" data-end=\"1434\"\u003e⭐  \u003cstrong data-start=\"1436\" data-end=\"1458\"\u003eAnti-stop function\u003c\/strong\u003e – prevents the pump from blocking during extended periods of inactivity\u003cbr data-start=\"1522\" data-end=\"1525\"\u003e⭐  \u003cstrong data-start=\"1527\" data-end=\"1556\"\u003eManual operation possible\u003c\/strong\u003e – ideal for maintenance and functional testing\u003c\/p\u003e  \u003chr data-start=\"1601\" data-end=\"1604\"\u003e  \u003ch2 data-start=\"1606\" data-end=\"1636\"\u003eDetailed description\u003c\/h2\u003e  \u003ch3 data-start=\"1638\" data-end=\"1671\"\u003eArea of ​​application \u0026amp; Target audience\u003c\/h3\u003e  \u003cp data-start=\"1672\" data-end=\"2004\"\u003eThe TECH EU-21 CWU is designed for heating systems where heat is drawn from the \u003cstrong data-start=\"1747\" data-end=\"1757\"\u003eboiler\u003c\/strong\u003e on one \u003cstrong data-start=\"1768\" data-end=\"1798\"\u003eBoiler or buffer tank\u003c\/strong\u003e It is transferred. It is suitable for single-family homes as well as for smaller multi-family or commercial applications and is aimed at both specialist tradespeople and operators of conventional heating systems.\u003c\/p\u003e  \u003ch3 data-start=\"2006\" data-end=\"2030\"\u003eEveryday benefits\u003c\/h3\u003e  \u003cp data-start=\"2031\" data-end=\"2298\"\u003eThanks to its temperature-differential-controlled operation, the circulation pump is only switched on when sufficient heat is actually available. This prevents unnecessary cooling of the storage tank, reduces energy consumption, and extends the pump's service life.\u003c\/p\u003e  \u003ch3 data-start=\"2300\" data-end=\"2327\"\u003eTechnology \u0026amp; equipment\u003c\/h3\u003e  \u003cp data-start=\"2328\" data-end=\"2632\"\u003eThe control system works with \u003cstrong data-start=\"2355\" data-end=\"2382\"\u003etwo temperature sensors\u003c\/strong\u003e (T1 = Boiler\/Buffer Tank, T2 = Boiler). As soon as the set temperature difference is reached and the switch-on threshold is exceeded, the controller automatically activates the pump. A fixed hysteresis ensures stable and reliable operation.\u003c\/p\u003e  \u003ch3 data-start=\"2634\" data-end=\"2665\"\u003eEfficiency \u0026amp; Plant protection\u003c\/h3\u003e  \u003cp data-start=\"2666\" data-end=\"2981\"\u003eIn addition, the EU-21 CWU has a \u003cstrong data-start=\"2709\" data-end=\"2732\"\u003eAntifreeze function\u003c\/strong\u003e:  If the system temperature drops below 6 °C, the pump is automatically switched on to prevent frost damage. The integrated \u003cstrong data-start=\"2865\" data-end=\"2887\"\u003eAnti-stop function\u003c\/strong\u003e The pump switches on briefly at regular intervals during prolonged periods of inactivity, thus protecting against blockages.\u003c\/p\u003e  \u003ch3 data-start=\"2983\" data-end=\"3023\"\u003ecompatibility \u0026amp; System integration\u003c\/h3\u003e  \u003cp data-start=\"3024\" data-end=\"3282\"\u003eThe TECH EU-21 CWU is designed for operation with 230 V circulation pumps and can be easily integrated into existing heating systems. The clear display and intuitive menu allow for quick commissioning and easy parameter adjustment.\u003c\/p\u003e  \u003chr data-start=\"3284\" data-end=\"3287\"\u003e  \u003ch2 data-start=\"3289\" data-end=\"3310\"\u003eTechnical data\u003c\/h2\u003e  \u003cdiv class=\"TyagGW_tableContainer\"\u003e  \u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e  \u003ctable data-start=\"3312\" data-end=\"3815\" class=\"w-fit min-w-(--thread-content-width)\"\u003e  \u003cthead data-start=\"3312\" data-end=\"3330\"\u003e  \u003ctr data-start=\"3312\" data-end=\"3330\"\u003e  \u003cth data-start=\"3312\" data-end=\"3322\" data-col-size=\"sm\" class=\"\"\u003efeature\u003c\/th\u003e  \u003cth data-start=\"3322\" data-end=\"3330\" data-col-size=\"sm\" class=\"\"\u003eValue\u003c\/th\u003e  \u003c\/tr\u003e  \u003c\/thead\u003e  \u003ctbody data-start=\"3348\" data-end=\"3815\"\u003e  \u003ctr data-start=\"3348\" data-end=\"3381\"\u003e  \u003ctd data-start=\"3348\" data-end=\"3361\" data-col-size=\"sm\"\u003eManufacturer\u003c\/td\u003e  \u003ctd data-col-size=\"sm\" data-start=\"3361\" data-end=\"3381\"\u003eTECH Controllers\u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr data-start=\"3382\" data-end=\"3404\"\u003e  \u003ctd data-start=\"3382\" data-end=\"3391\" data-col-size=\"sm\"\u003eModel\u003c\/td\u003e  \u003ctd data-col-size=\"sm\" data-start=\"3391\" data-end=\"3404\"\u003eEU-21 CWU\u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr data-start=\"3405\" data-end=\"3458\"\u003e  \u003ctd data-start=\"3405\" data-end=\"3418\" data-col-size=\"sm\"\u003eProduct type\u003c\/td\u003e  \u003ctd data-col-size=\"sm\" data-start=\"3418\" data-end=\"3458\"\u003ePump control\/Circulation pump controller\u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr data-start=\"3459\" data-end=\"3504\"\u003e  \u003ctd data-start=\"3459\" data-end=\"3481\" data-col-size=\"sm\"\u003eSupply voltage\u003c\/td\u003e  \u003ctd data-col-size=\"sm\" data-start=\"3481\" data-end=\"3504\"\u003e230 V ±10 %\/50 Hz\u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr data-start=\"3505\" data-end=\"3532\"\u003e  \u003ctd data-start=\"3505\" data-end=\"3525\" data-col-size=\"sm\"\u003ePower consumption\u003c\/td\u003e  \u003ctd data-col-size=\"sm\" data-start=\"3525\" data-end=\"3532\"\u003e2 W\u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr data-start=\"3533\" data-end=\"3565\"\u003e  \u003ctd data-start=\"3533\" data-end=\"3554\" data-col-size=\"sm\"\u003eOperating temperature\u003c\/td\u003e  \u003ctd data-col-size=\"sm\" data-start=\"3554\" data-end=\"3565\"\u003e5–50 °C\u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr data-start=\"3566\" data-end=\"3606\"\u003e  \u003ctd data-start=\"3566\" data-end=\"3597\" data-col-size=\"sm\"\u003eMax. load pump output\u003c\/td\u003e  \u003ctd data-col-size=\"sm\" data-start=\"3597\" data-end=\"3606\"\u003e0.5 A\u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr data-start=\"3607\" data-end=\"3655\"\u003e  \u003ctd data-start=\"3607\" data-end=\"3648\" data-col-size=\"sm\"\u003eMax.Load potential-free contact\u003c\/td\u003e  \u003ctd data-col-size=\"sm\" data-start=\"3648\" data-end=\"3655\"\u003e1 A\u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr data-start=\"3656\" data-end=\"3694\"\u003e  \u003ctd data-start=\"3656\" data-end=\"3685\" data-col-size=\"sm\"\u003eTemperature measurement accuracy\u003c\/td\u003e  \u003ctd data-col-size=\"sm\" data-start=\"3685\" data-end=\"3694\"\u003e±1 °C\u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr data-start=\"3695\" data-end=\"3742\"\u003e  \u003ctd data-start=\"3695\" data-end=\"3724\" data-col-size=\"sm\"\u003eTemperature range sensors\u003c\/td\u003e  \u003ctd data-col-size=\"sm\" data-start=\"3724\" data-end=\"3742\"\u003e-30 to +99 °C\u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr data-start=\"3743\" data-end=\"3778\"\u003e  \u003ctd data-start=\"3743\" data-end=\"3755\" data-col-size=\"sm\"\u003eSecurity\u003c\/td\u003e  \u003ctd data-col-size=\"sm\" data-start=\"3755\" data-end=\"3778\"\u003e1.6 A miniature fuse\u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr data-start=\"3779\" data-end=\"3815\"\u003e  \u003ctd data-start=\"3779\" data-end=\"3804\" data-col-size=\"sm\"\u003eMounting hole spacing\u003c\/td\u003e  \u003ctd data-col-size=\"sm\" data-start=\"3804\" data-end=\"3815\"\u003e86.5 mm\u003c\/td\u003e  \u003c\/tr\u003e  \u003c\/tbody\u003e  \u003c\/table\u003e  \u003c\/div\u003e  \u003c\/div\u003e  \u003chr data-start=\"3817\" data-end=\"3820\"\u003e  \u003ch2 data-start=\"3822\" data-end=\"3839\"\u003eScope of delivery\u003c\/h2\u003e  \u003cul data-start=\"3841\" data-end=\"3941\"\u003e  \u003cli data-start=\"3841\" data-end=\"3871\"\u003e  \u003cp data-start=\"3843\" data-end=\"3871\"\u003eTECH EU-21 CWU control unit\u003c\/p\u003e  \u003c\/li\u003e  \u003cli data-start=\"3872\" data-end=\"3896\"\u003e  \u003cp data-start=\"3874\" data-end=\"3896\"\u003e2 × temperature sensor\u003c\/p\u003e  \u003c\/li\u003e  \u003cli data-start=\"3897\" data-end=\"3920\"\u003e  \u003cp data-start=\"3899\" data-end=\"3920\"\u003eUser manual\u003c\/p\u003e  \u003c\/li\u003e  \u003cli data-start=\"3921\" data-end=\"3941\"\u003e  \u003cp data-start=\"3923\" data-end=\"3941\"\u003eAssembly instructions\u003c\/p\u003e  \u003c\/li\u003e  \u003c\/ul\u003e  \u003chr data-start=\"3943\" data-end=\"3946\"\u003e  \u003ch2 data-start=\"3948\" data-end=\"3973\"\u003eAccessories\/Recommendation\u003c\/h2\u003e  \u003cul data-start=\"3975\" data-end=\"4125\"\u003e  \u003cli data-start=\"3975\" data-end=\"4011\"\u003e  \u003cp data-start=\"3977\" data-end=\"4011\"\u003eCirculation pumps for heating systems\u003c\/p\u003e  \u003c\/li\u003e  \u003cli data-start=\"4012\" data-end=\"4041\"\u003e  \u003cp data-start=\"4014\" data-end=\"4041\"\u003eBuffer tank and boiler\u003c\/p\u003e  \u003c\/li\u003e  \u003cli data-start=\"4042\" data-end=\"4082\"\u003e  \u003cp data-start=\"4044\" data-end=\"4082\"\u003eSensor sleeves and sensor mountings\u003c\/p\u003e  \u003c\/li\u003e  \u003cli data-start=\"4083\" data-end=\"4125\"\u003e  \u003cp data-start=\"4085\" data-end=\"4125\"\u003eAdvanced heating controls from TECH\u003c\/p\u003e  \u003c\/li\u003e  \u003c\/ul\u003e  \u003cp data-start=\"4127\" data-end=\"4209\"\u003eYou can find suitable products in the relevant categories on \u003cstrong data-start=\"4193\" data-end=\"4208\"\u003egemashop.de\u003c\/strong\u003e.\u003c\/p\u003e  \u003chr data-start=\"4211\" data-end=\"4214\"\u003e  \u003ch2 data-start=\"4216\" data-end=\"4251\"\u003eAssembly \u0026amp; Safety instructions\u003c\/h2\u003e  \u003cp data-start=\"4253\" data-end=\"4522\"\u003eInstallation and commissioning must be carried out exclusively by a qualified specialist company. The device must be disconnected from the power supply before any work is done on the electrical installation. Sensors must be professionally mounted and insulated against external influences.\u003c\/p\u003e  \u003chr data-start=\"4524\" data-end=\"4527\"\u003e  \u003ch2 data-start=\"4529\" data-end=\"4537\"\u003eFAQ\u003c\/h2\u003e  \u003cp data-start=\"4539\" data-end=\"4670\"\u003e\u003cstrong data-start=\"4539\" data-end=\"4589\"\u003eFor which systems is the EU-21 CWU suitable?\u003c\/strong\u003e\u003cbr data-start=\"4589\" data-end=\"4592\"\u003eFor heating systems with boiler and storage tank or buffer tank for pump control.\u003c\/p\u003e  \u003cp data-start=\"4672\" data-end=\"4795\"\u003e\u003cstrong data-start=\"4672\" data-end=\"4703\"\u003eHow does the control system work?\u003c\/strong\u003e\u003cbr data-start=\"4703\" data-end=\"4706\"\u003eIt switches the pump on depending on the temperature difference between the boiler and the storage tank.\u003c\/p\u003e  \u003cp data-start=\"4797\" data-end=\"4903\"\u003e\u003cstrong data-start=\"4797\" data-end=\"4832\"\u003eIs antifreeze integrated?\u003c\/strong\u003e\u003cbr data-start=\"4832\" data-end=\"4835\"\u003eYes, the pump is automatically activated at low temperatures.\u003c\/p\u003e  \u003cp data-start=\"4905\" data-end=\"4994\"\u003e\u003cstrong data-start=\"4905\" data-end=\"4953\"\u003eCan the pump be switched on manually?\u003c\/strong\u003e\u003cbr data-start=\"4953\" data-end=\"4956\"\u003eYes, a manual mode is available.\u003c\/p\u003e  \u003cp data-start=\"4996\" data-end=\"5094\"\u003e\u003cstrong data-start=\"4996\" data-end=\"5036\"\u003eHow many sensors are used?\u003c\/strong\u003e\u003cbr data-start=\"5036\" data-end=\"5039\"\u003eTwo temperature sensors – one for the boiler and one for the storage tank\/buffer tank.\u003c\/p\u003e  \u003cp data-start=\"5096\" data-end=\"5203\"\u003e\u003cstrong data-start=\"5096\" data-end=\"5134\"\u003eIs the controller pre-configured?\u003c\/strong\u003e\u003cbr data-start=\"5134\" data-end=\"5137\"\u003eYes, factory settings are available and can be adjusted.\u003c\/p\u003e  \u003chr data-start=\"5205\" data-end=\"5208\"\u003e  \u003ch2 data-start=\"5210\" data-end=\"5220\"\u003eConclusion\u003c\/h2\u003e  \u003cp data-start=\"5221\" data-end=\"5427\"\u003eThe \u003cstrong data-start=\"5225\" data-end=\"5243\"\u003eTECH EU-21 CWU\u003c\/strong\u003e This is a reliable and efficient pump control system for conventional heating systems with boilers and storage tanks. Ideal for economical, safe, and long-lasting system operation.\u003c\/p\u003e","brand":"Master","offers":[{"title":"Default Title","offer_id":47098238665052,"sku":"DE39","price":78.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/7796\/6428\/files\/tech-eu-21-cwu-pumpensteuerung-umwalzpumpe-kessel-boiler-temperaturdifferenzregler-3684607.webp?v=1770861625","url":"https:\/\/gemashop.de\/en\/products\/tech-eu-21-cwu-pumpensteuerung-umwaelzpumpe","provider":"GEMA Shop","version":"1.0","type":"link"}