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08-02-2005, 05:16 PM #1Professional Member
- Join Date
- Jan 2003
I have a variable speed kithen exhause fan. Sometime people uses the range and don't turn on the fan.
I want to have the fan turn-on automatically at various speeds depending on needs.
I was thinking having a temperature sensor control the speed of the fan. Higher temp - higher speed.
spec: 120v fan
assumption: fan speed is varied by cutting the frequency.
question: is there small device (like a head pressure control by slowing down the condensor fan) that will vary the freq base on temp?
I would like to have some flexiblity in defining the range. For example; at < 95 degree, disable fan
at 95 degree, run at 10 hz
at > 120 degree, run at 60 hz.
this should be fun.
[Edited by comfortmaster1 on 08-02-2005 at 05:30 PM]
08-02-2005, 10:06 PM #2Professional Member
- Join Date
- Oct 2003
WOW lots of time on your hands or what???
08-02-2005, 11:07 PM #3
08-06-2005, 11:41 AM #4
AC Tech makes some small afordable vfd's and you could control this with a Johnson A350P for speed from temps mentioned and A350 will enable start/stop.
Just a thought.
08-06-2005, 02:47 PM #5
Just yell at the people not turning the fan on when they cook and tell them if they keep it up they'll pay the electric bill for the added a/c usage. It took a couple of weeks with the wife but she finally remembers to turn the fan on!"How it can be considered "Open" is beyond me. Calling it "voyeur-ed" would be more accurate." pka LeroyMac, SkyIsBlue, fka Freddy-B, Mongo, IndyBlue
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