How to Protect Ducting from Overpressure
How to Protect Ducting from Overpressure
(OP)
Our ducting is designed to +10 w.g., as a part of our system is a dryer. I noticed that shutoff pressure for dryer's blower is 15 w.g. My question is how to protect ducting in case of dryer/blower being started while downstream dampers are closed? What method or device you recommend? Furthermore if i do not provide overpressure protection what is the worst thing that can happen?
Thanks for your input.
Thanks for your input.





RE: How to Protect Ducting from Overpressure
RE: How to Protect Ducting from Overpressure
RE: How to Protect Ducting from Overpressure
RE: How to Protect Ducting from Overpressure
Good suggestion, if you don't have a building automation system, though the G60 seems cheesy.
RE: How to Protect Ducting from Overpressure
i wonder, you say shut-off pressure is 15", i suppose you mean at no-flow? does your duct have dampers at all? If there isn't really something to damper it off (reduce flow to 0), there wouldn't be a danger of fan to produce maximum pressure.
You also can use a pressure sensor that stops the fan, but a PRAd damper seemms simple and reliable. BAS also can lose control over the fan if someone puts the VFD in bypass, so there is that.