TECH EU 21 CWU Pumpensteuerung Umwälzpumpe Kessel Boiler pkb20 The TECH EU 21 CWU is Performance selection:5.5 kW The TECH EU 21 CWU is designed for heating systems in which heat is transferred from the boiler to a hot water tank or buffer tank Maximum operating pressure 10 bar the controller automatically activates the pump the pump is automatically switched on to prevent frost damage
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