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6.5 Local Switch
This item is used to control locally the operating mode of the AHU.
NOTE! Note: Local switch must set to a value not Off or Test in order the BMS to be able to turn unit
ON provided that Control Source is set to BMS. (see Control source priority chain).
HMI Path: Main Menu -> Local Switch
Main Menu item
Value
Description
Local Switch
- Auto
- Off
- On
- Ventilation
- Economy
- Test
Auto
:
AHU On-Off state is managed by the time scheduler.
Refer to
Time Scheduler
page for more details.
Off:
turn off the AHU.
On
:
turn on the AHU.
In this mode all controls are active and setpoints related to temperature
regulation and fans control are the normal setpoints.
Refer to
Setpoints
page
to change normal setpoints.
Ventilation
:
Switch the AHU in
ventilation mode.
In this mode only fans are running.
No temperature control is performed.
Economy
:
Switch the
AHU in economy mode.
In this mode all controls are active, but the setpoints related to temperature
regulation and fans control switch from normal setpoints to economy
setpoints.
Refer to
Setpoints
page to change economy setpoints.
Test:
AHU in Test mode.
In this mode every device of the AHU can be manually controlled.
NOTE! This function is only available with service password
entered and the item is visible only if the AHU is OFF.
