For an example of the optimal start process, assume:
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The Zone Occ Mode Obj is scheduled to be occupied at 7:00 A.M. and unoccupied at 5:00 P.M.
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Zone Temperature = 55˚F before the warmup period
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Heating Setpoint (since in Heating mode) = 70˚F
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Heating Deadpoint (since in Heating mode) = 5 minutes
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Heating Constant (since in Heating mode) = 10 (The optimal start process has run for several days, and the Heating Constant has been adjusted to 10 based on past performance.)
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Temperature Difference = 70˚F - 55˚F = 15˚F
Therefore:
Optimal Start Time = [(10/100) x 152] + 5
= (0.1 x 152) + 5
= (0.1 x 225) + 5
= 22.5 + 5
= 27.5
= 28 minutes
The optimal start process turns on the Zone WC Mode Obj at 6:32 A.M. (28 minutes prior to the scheduled 7:00 A.M. start time.)