Hi,
I have an issue about monitoring device for constant volume system. In the credit language, for constant volume system, it require install a current transducer on the supply fan, airflow switch, pressure transducer.
My question is the monitoring only feedback signal of status different pressure (after and before filter) to BMS in case we use Primary Air Handling Unit without ALARM?
OR monitoring device must be ALARM when different pressure higher than setpoint?
Dave Hubka
Practice Leader - SustainabilityEUA
LEEDuser Expert
530 thumbs up
July 1, 2020 - 4:15 pm
For constant-volume systems, balance outdoor airflow to the design minimum outdoor airflow rate defined by ASHRAE Standard 62.1–2010 (with errata), or higher. Install a current transducer on the supply fan, an airflow switch, or similar monitoring device.
Alarms, on constant volume systems, are not required - per the reference guide language. This was an oversight when creating the LEED reference guide, and I do not believe this has been corrected yet.
Dang Thi
ESD EngineerGreenViet Consultancy Company
3 thumbs up
July 1, 2020 - 9:10 pm
I think it's non-sense when an airflow switch only output signal on or off without do anymore; a current transducer is only give mili Volt of flowrate without convert to alarm signal!
On the LEED v4.1 is also similar to v4. They don't give more detail for constant volumne.
Dave Hubka
Practice Leader - SustainabilityEUA
LEEDuser Expert
530 thumbs up
July 2, 2020 - 9:57 am
Project teams can always go beyond the minimum requirements of the prereq/credit language.
GBCI will not deny prereqs/credits because requirements were exceeded.
Good Luck!