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Availability for two different systems: VRF and radiant floors

My project has a room served by a radiant slab for heating, and a VRF terminal for cooling. How can I make it so that each system only works for their respective load ?

As a related question, in case the radiant floor is not enough to handle the heating load, the VRF in heating mode should handle the differential. The radiant system should be sized enough for this not to be the case, but the control sequence allows it.