{"product_id":"tech-eu-21-cwu-pumpensteuerung-umwaelzpumpe","title":"TECH EU-21 CWU Pump Controller Circulating Pump Boiler Water Heater","description":"\u003cp data-start=\"866\" data-end=\"1127\"\u003eThe \u003cstrong data-start=\"870\" data-end=\"888\"\u003eTECH EU-21 CWU\u003c\/strong\u003e is a compact controller for automatic regulation of a circulation pump between the boiler and the hot water tank or buffer tank. It operates based on temperature difference and reliably protects the system from unnecessary pump operation and frost.\u003c\/p\u003e\n\u003chr data-start=\"1129\" data-end=\"1132\"\u003e\n\u003ch2 data-start=\"1134\" data-end=\"1160\"\u003eHighlights \/ Benefits\u003c\/h2\u003e\n\u003cp data-start=\"1162\" data-end=\"1599\"\u003e⭐ \u003cstrong data-start=\"1164\" data-end=\"1196\"\u003eDifferential temperature control\u003c\/strong\u003e – Pump runs only when there is actual heat demand\u003cbr data-start=\"1244\" data-end=\"1247\"\u003e⭐ \u003cstrong data-start=\"1249\" data-end=\"1276\"\u003eTwo temperature sensors\u003c\/strong\u003e – Separate detection of boiler and tank\/buffer temperature\u003cbr data-start=\"1338\" data-end=\"1341\"\u003e⭐ \u003cstrong data-start=\"1343\" data-end=\"1377\"\u003eFrost protection function integrated\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 pump seizure during prolonged standstill\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\n\u003chr data-start=\"1601\" data-end=\"1604\"\u003e\n\u003ch2 data-start=\"1606\" data-end=\"1636\"\u003eDetailed description\u003c\/h2\u003e\n\u003ch3 data-start=\"1638\" data-end=\"1671\"\u003eApplication area \u0026 target group\u003c\/h3\u003e\n\u003cp data-start=\"1672\" data-end=\"2004\"\u003eThe TECH EU-21 CWU is designed for heating systems in which heat is transferred from the \u003cstrong data-start=\"1747\" data-end=\"1757\"\u003eboiler\u003c\/strong\u003e to a \u003cstrong data-start=\"1768\" data-end=\"1798\"\u003ehot water tank or buffer tank\u003c\/strong\u003e . It is suitable for single-family homes as well as smaller multi-family or commercial applications and is aimed at both professional tradesmen and operators of classic heating systems.\u003c\/p\u003e\n\u003ch3 data-start=\"2006\" data-end=\"2030\"\u003eEveryday benefits\u003c\/h3\u003e\n\u003cp data-start=\"2031\" data-end=\"2298\"\u003eThanks to the temperature-differential operating mode, the circulation pump is only switched on when sufficient heat is actually available. This prevents unnecessary cooling of the storage tank, reduces power consumption, and extends the service life of the pump.\u003c\/p\u003e\n\u003ch3 data-start=\"2300\" data-end=\"2327\"\u003eTechnology \u0026 equipment\u003c\/h3\u003e\n\u003cp data-start=\"2328\" data-end=\"2632\"\u003eThe controller works with \u003cstrong data-start=\"2355\" data-end=\"2382\"\u003etwo temperature sensors\u003c\/strong\u003e (T1 = tank\/buffer, 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 safe operation.\u003c\/p\u003e\n\u003ch3 data-start=\"2634\" data-end=\"2665\"\u003eEfficiency \u0026 system protection\u003c\/h3\u003e\n\u003cp data-start=\"2666\" data-end=\"2981\"\u003eIn addition, the EU-21 CWU features an \u003cstrong data-start=\"2709\" data-end=\"2732\"\u003eantifreeze function\u003c\/strong\u003e: If the temperature in the system 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 briefly switches the pump on at regular intervals during prolonged inactivity, thus protecting it from seizure.\u003c\/p\u003e\n\u003ch3 data-start=\"2983\" data-end=\"3023\"\u003eCompatibility \u0026 system integration\u003c\/h3\u003e\n\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 straightforward menu enable quick commissioning and simple parameter adjustment.\u003c\/p\u003e\n\u003chr data-start=\"3284\" data-end=\"3287\"\u003e\n\u003ch2 data-start=\"3289\" data-end=\"3310\"\u003eTechnical data\u003c\/h2\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"3312\" data-end=\"3815\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"3312\" data-end=\"3330\"\u003e\n\u003ctr data-start=\"3312\" data-end=\"3330\"\u003e\n\u003cth data-start=\"3312\" data-end=\"3322\" data-col-size=\"sm\" class=\"\"\u003eFeature\u003c\/th\u003e\n\u003cth data-start=\"3322\" data-end=\"3330\" data-col-size=\"sm\" class=\"\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"3348\" data-end=\"3815\"\u003e\n\u003ctr data-start=\"3348\" data-end=\"3381\"\u003e\n\u003ctd data-start=\"3348\" data-end=\"3361\" data-col-size=\"sm\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3361\" data-end=\"3381\"\u003eTECH Controllers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3382\" data-end=\"3404\"\u003e\n\u003ctd data-start=\"3382\" data-end=\"3391\" data-col-size=\"sm\"\u003eModel\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3391\" data-end=\"3404\"\u003eEU-21 CWU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3405\" data-end=\"3458\"\u003e\n\u003ctd data-start=\"3405\" data-end=\"3418\" data-col-size=\"sm\"\u003eProduct type\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3418\" data-end=\"3458\"\u003ePump controller \/ circulation pump regulator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3459\" data-end=\"3504\"\u003e\n\u003ctd data-start=\"3459\" data-end=\"3481\" data-col-size=\"sm\"\u003eSupply voltage\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3481\" data-end=\"3504\"\u003e230 V ±10 % \/ 50 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3505\" data-end=\"3532\"\u003e\n\u003ctd data-start=\"3505\" data-end=\"3525\" data-col-size=\"sm\"\u003ePower consumption\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3525\" data-end=\"3532\"\u003e2 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3533\" data-end=\"3565\"\u003e\n\u003ctd data-start=\"3533\" data-end=\"3554\" data-col-size=\"sm\"\u003eOperating temperature\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3554\" data-end=\"3565\"\u003e5–50 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3566\" data-end=\"3606\"\u003e\n\u003ctd data-start=\"3566\" data-end=\"3597\" data-col-size=\"sm\"\u003eMax. load pump output\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3597\" data-end=\"3606\"\u003e0.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3607\" data-end=\"3655\"\u003e\n\u003ctd data-start=\"3607\" data-end=\"3648\" data-col-size=\"sm\"\u003eMax. load potential-free contact\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3648\" data-end=\"3655\"\u003e1 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3656\" data-end=\"3694\"\u003e\n\u003ctd data-start=\"3656\" data-end=\"3685\" data-col-size=\"sm\"\u003eTemperature measurement accuracy\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3685\" data-end=\"3694\"\u003e±1 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3695\" data-end=\"3742\"\u003e\n\u003ctd data-start=\"3695\" data-end=\"3724\" data-col-size=\"sm\"\u003eTemperature range sensors\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3724\" data-end=\"3742\"\u003e−30 to +99 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3743\" data-end=\"3778\"\u003e\n\u003ctd data-start=\"3743\" data-end=\"3755\" data-col-size=\"sm\"\u003eFuse\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3755\" data-end=\"3778\"\u003e1.6 A fine fuse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3779\" data-end=\"3815\"\u003e\n\u003ctd data-start=\"3779\" data-end=\"3804\" data-col-size=\"sm\"\u003eMounting hole spacing\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3804\" data-end=\"3815\"\u003e86.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr data-start=\"3817\" data-end=\"3820\"\u003e\n\u003ch2 data-start=\"3822\" data-end=\"3839\"\u003eScope of delivery\u003c\/h2\u003e\n\u003cul data-start=\"3841\" data-end=\"3941\"\u003e\n\u003cli data-start=\"3841\" data-end=\"3871\"\u003e\n\u003cp data-start=\"3843\" data-end=\"3871\"\u003eTECH EU-21 CWU control unit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3872\" data-end=\"3896\"\u003e\n\u003cp data-start=\"3874\" data-end=\"3896\"\u003e2 × temperature sensor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3897\" data-end=\"3920\"\u003e\n\u003cp data-start=\"3899\" data-end=\"3920\"\u003eOperating instructions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3921\" data-end=\"3941\"\u003e\n\u003cp data-start=\"3923\" data-end=\"3941\"\u003eInstallation instructions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3943\" data-end=\"3946\"\u003e\n\u003ch2 data-start=\"3948\" data-end=\"3973\"\u003eAccessories \/ Recommendation\u003c\/h2\u003e\n\u003cul data-start=\"3975\" data-end=\"4125\"\u003e\n\u003cli data-start=\"3975\" data-end=\"4011\"\u003e\n\u003cp data-start=\"3977\" data-end=\"4011\"\u003eCirculation pumps for heating systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4012\" data-end=\"4041\"\u003e\n\u003cp data-start=\"4014\" data-end=\"4041\"\u003eBuffer tanks and hot water tanks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4042\" data-end=\"4082\"\u003e\n\u003cp data-start=\"4044\" data-end=\"4082\"\u003eSensor pockets and sensor mountings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4083\" data-end=\"4125\"\u003e\n\u003cp data-start=\"4085\" data-end=\"4125\"\u003eAdvanced heating controls from TECH\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4127\" data-end=\"4209\"\u003eYou will find suitable products in the corresponding categories on \u003cstrong data-start=\"4193\" data-end=\"4208\"\u003egemashop.de\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr data-start=\"4211\" data-end=\"4214\"\u003e\n\u003ch2 data-start=\"4216\" data-end=\"4251\"\u003eAssembly \u0026 Safety Instructions\u003c\/h2\u003e\n\u003cp data-start=\"4253\" data-end=\"4522\"\u003eInstallation and commissioning may only be carried out by a qualified specialist company. Before working on the electrical installation, the device must be disconnected from the power supply. Sensors must be properly attached and insulated against external influences.\u003c\/p\u003e\n\u003chr data-start=\"4524\" data-end=\"4527\"\u003e\n\u003ch2 data-start=\"4529\" data-end=\"4537\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"4539\" data-end=\"4670\"\u003e\u003cstrong data-start=\"4539\" data-end=\"4589\"\u003eWhich systems is the EU-21 CWU suitable for?\u003c\/strong\u003e\u003cbr data-start=\"4589\" data-end=\"4592\"\u003eFor heating systems with boiler and hot water tank or buffer tank for pump control.\u003c\/p\u003e\n\u003cp data-start=\"4672\" data-end=\"4795\"\u003e\u003cstrong data-start=\"4672\" data-end=\"4703\"\u003eHow does the controller work?\u003c\/strong\u003e\u003cbr data-start=\"4703\" data-end=\"4706\"\u003eIt switches the pump on and off depending on the temperature difference between the boiler and the storage tank.\u003c\/p\u003e\n\u003cp data-start=\"4797\" data-end=\"4903\"\u003e\u003cstrong data-start=\"4797\" data-end=\"4832\"\u003eIs frost protection integrated?\u003c\/strong\u003e\u003cbr data-start=\"4832\" data-end=\"4835\"\u003eYes, at low temperatures the pump is activated automatically.\u003c\/p\u003e\n\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\n\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 hot water tank\/buffer tank.\u003c\/p\u003e\n\u003cp data-start=\"5096\" data-end=\"5203\"\u003e\u003cstrong data-start=\"5096\" data-end=\"5134\"\u003eIs the controller preconfigured?\u003c\/strong\u003e\u003cbr data-start=\"5134\" data-end=\"5137\"\u003eYes, factory settings are available and can be adjusted.\u003c\/p\u003e\n\u003chr data-start=\"5205\" data-end=\"5208\"\u003e\n\u003ch2 data-start=\"5210\" data-end=\"5220\"\u003eConclusion\u003c\/h2\u003e\n\u003cp data-start=\"5221\" data-end=\"5427\"\u003eThe \u003cstrong data-start=\"5225\" data-end=\"5243\"\u003eTECH EU-21 CWU\u003c\/strong\u003e is a reliable and efficient pump controller for classic heating systems with boiler and storage tank. Ideal for economical, safe, and long-lasting system operation.\u003c\/p\u003e","brand":"Master","offers":[{"title":"Vaiketitel","offer_id":47098238665052,"sku":"DE39","price":83.12,"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:\/\/ee.gemashop.de\/en\/products\/tech-eu-21-cwu-pumba-juhtseade-tsirkulatsioonipump","provider":"GEMA Shop","version":"1.0","type":"link"}