HR-03 wired  wiring centre is designed to be used in conjunction with our cable thermostats as HT-08/HT-07/HT-09/HT-22/HT-23 at water underfloor heating system. 8 zones can be controlled as well as providing an output for circulation pump and boiler. Up to 5 thermal actuators can be connected to each zone. Item No.: HR-02C Can work up to 8 room thermostats Max. 5 thermal actuator each zone  Convenient wiring and installation Modbus ( Optional) Opentherm connection (Optional)