blockReliefDamper
Relief damper control for AHUs using actuated dampers without fan
Information
Sequence for controlling actuated relief damper yRelDam for AHUs using
actuated relief damper without a fan.
It is implemented according to Section 5.16.8 of ASHRAE Guideline G36, May 2020.
-
Relief dampers shall be enabled when the associated supply fan is proven on
(
u1SupFan = true), and disabled otherwise. -
When enabled, use a P-only control loop to modulate relief dampers to maintain building
static pressure
dpBuiat its setpoint, which is by defaul 12 Pa (0.05 inchWC). - Close damper when disabled.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | dpBuiSet | 12 | Building static pressure difference relative to ambient (positive to pressurize the building) |
| Real | k | 0.5 | Gain, applied to building pressure control error normalized with dpBuiSet |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Controls.OBC.CDL.Interfaces.RealInput | dpBui | Building static pressure difference, relative to ambient (positive if pressurized) | |
| Buildings.Controls.OBC.CDL.Interfaces.BooleanInput | u1SupFan | Supply fan status | |
| Buildings.Controls.OBC.CDL.Interfaces.RealOutput | yRelDam | Relief damper commanded position |
Revisions
-
May 20, 2021, by Jianjun Hu:
First implementation.