The Uponor Four-zone Control Module is a printed circuit control and diagnostic device used with Uponor thermostats, zone valves, and two-wire or four-wire actuators in a hydronic radiant heating and cooling system. It provides connection to the power supply transformer, the interconnections between the individual thermostats and their respective thermal actuators or zone valves, as well as the connection between end switches and respective pumps or boiler relays.