RTR-B 721 Room thermostat, mechanical, 230V AC, external control

Single-stage, mechanical room controller, bi-metal technology, THERMASREG~ RTR-B is suitable for temperature monitoring / thermostat in dry rooms, respectively for controlling all types of heating valves. In the case of de-energized heating valves, the cooling output must be connected (make contact). Up to 10 and at the make contact up to 5 valve actuators can be connected to the break contact.