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.
- Exhaust damper shall open whenever associated supply fan is
proven on.
- Return fan shall run whenever associated supply fan is proven
on.
- 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.
- Exhaust damper shall be closed when return fan is
disabled.
- May 20, 2021, by Jianjun Hu:
First implementation.
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.Buildings.Controls.OBC.ASHRAE.G36.AHUs.SingleZone.VAV.SetPoints.ReturnFan