Control unit for terminal box K18

Intended for immersion heater IU611, 611R Power stage 0 - ¼ - ½ - ¾ - 1 Provided with 2 hours switching delay on the half effect during power outage. Provided with contactors for the switching delayed part. If desired, half of the effect can be deactivated, in case of overloading, via current relay. 4 pole thermostat 30-90°C 3 pole temperature limiter 110°C Timer and contactor