The ESBE CRK210 is a constant temperature controller that is intended for ESBE Rotary valves Series VRG. The CRK210 is designed for applications where the same system will be used for heating and cooling applications. The controller is fitted with a smart relay, which, when operated, can be used to change the opening/closing direction when the system is switched between heating & cooling.
Constant temperature Controller for combined heating and cooling system