Locks

Additional interactions among devices in a room application are required.

There are two basic interactions:

• Demand: Heating coils, electric heating coils, and air cooling request that the fan or the VAV box supply the required air volume (red path, AirFlReqHeat and blue path, AirFlHldHeat).
• Lock: The electric heating coils are locked if no air flow exists (green path, AirFlSta).