Jean,
The MixedAir SetpointManager works somewhat differently than the concept of other SetpointManagers. Most SetpointManagers have the purpose of maintaining a specific value (e.g., temperature or humidity) at a node. Here’s how I understand that the :MixedAir version works:
Keep in mind that the heat added to the air flow from a fan (normally .5 – 1.5C), affects the cooling or heating process. If the fan is in a draw-through position (downstream of the coil), the cooling coil logic is:
· A discharge temperature of, say, 12C is required to satisfy the SetpointManager:Scheduled
· The fan (at this particular timestep) adds 1C to the air temperature
· So the cooling coil must operate to produce 11C air in order that 12C is achieved at the outlet / discharge
AS you mention below, this SetpointManager “knows” whether cooling or heating is in use. This varies a bit for other types of SetpointManagers, such as :SingleZone:Reheat or :Warmest, but is applied in the same manner.
The MixedAir SetpointManager has the job
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