Return fan control for single zone AHU
Sequence for controlling return fan yRetFan for single AHUs.
It is implemented according to Section 5.18.10 of ASHRAE Guideline G36, May 2020.
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Exhaust damper shall open whenever associated supply fan is proven on.
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Return fan shall run whenever associated supply fan is proven on.
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Return fan speed shall be the same as supply fan speed with a user adjustable offset.
See Section 3.2.1.5 for details about the offset.
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Exhaust damper shall be closed when return fan is disabled.
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May 20, 2021, by Jianjun Hu:
First implementation.
Generated at 2025-03-13T19:24:49Z
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.Buildings.Controls.OBC.ASHRAE.G36.AHUs.SingleZone.VAV.SetPoints.ReturnFan