|
 orchidfanatic
retiree
 
Registered: 08/12/07
Posts: 832
Loc: where the wild things are
|
 Re: Laminar Flow Hood (w/ pic) [Re: makaveli8x8]
#7590646 - 11/03/07 10:49 AM (1 year, 2 months ago) |
|
|
I am still waiting for mine in the mail 
let me know how yours turns out makaveli8x8
|
 ZeropointMind
Stranger
Registered: 08/28/05
Posts: 67
Last seen: 9 months, 21 days
|
|
Hey, I finally ended up getting a flow hood.... its an IAS hood with two blowers.. I have a problem tho.. The second blower shuts off after about 10 mins, as if I don't have enough power? I got a 15A 14 guage 125v cord for it... clean filters, and new prefilters.. any idea on what the problem could be? thanks..
|
makaveli8x8
Stranger
Registered: 02/28/06
Posts: 7,033
Last seen: 22 hours, 1 minute
|
|
im not 100% on this but im going to guess if you don't put a divider down the middle to split the airflow between them, it will result in them blowing against each other?
--------------------
  We were sent to hell for eternity  Ø h®
We play on earth to pass the time 
Over-population the root of all Evil-brings the Elites Closer to the gates.
|
ZeropointMind
Stranger
Registered: 08/28/05
Posts: 67
Last seen: 9 months, 21 days
|
Re: Laminar Flow Hood (w/ pic) [Re: makaveli8x8]
#7649204 - 11/17/07 09:47 PM (1 year, 1 month ago) |
|
|
|
ZeropointMind
Stranger
Registered: 08/28/05
Posts: 67
Last seen: 9 months, 21 days
|
Re: Laminar Flow Hood (w/ pic) [Re: makaveli8x8]
#7649209 - 11/17/07 09:49 PM (1 year, 1 month ago) |
|
|
|
ZeropointMind
Stranger
Registered: 08/28/05
Posts: 67
Last seen: 9 months, 21 days
|
|
|
makaveli8x8
Stranger
Registered: 02/28/06
Posts: 7,033
Last seen: 22 hours, 1 minute
|
|
aw so you bought it prebuilt? If so i would try contacting the person you bought it from. Maybe someone else here will chime in with some ideas as to why that blower is turning off after 10 mins.
Again the only "idea" that comes to my mind is that their isn't a divider and the 2 blowers are blowing against each other causing overheating.
--------------------
We were sent to hell for eternity Øh®
We play on earth to pass the time
Over-population the root of all Evil-brings the Elites Closer to the gates.
|
ZeropointMind
Stranger
Registered: 08/28/05
Posts: 67
Last seen: 9 months, 21 days
|
Re: Laminar Flow Hood (w/ pic) [Re: makaveli8x8]
#7649285 - 11/17/07 10:11 PM (1 year, 1 month ago) |
|
|
Thanks.. it came from a .com that went under... i'll continue searching for answers.. thanks again..
|
orchidfanatic
retiree
Registered: 08/12/07
Posts: 832
Loc: where the wild things are
|
|
I think that means the brushes are worn .. when the motor gets hot
the resistance increases on the brush contacts .
I would take those brushes out and look at them to rule that out.
most motors have replaceable brushes but yours may not ..
good luck
|
RogerRabbit
Bans for Pleasure
Registered: 03/26/03
Posts: 19,047
Loc: USA Mountain Northwest
Last seen: 43 minutes, 11 seconds
|
|
Brushes will be on DC motors. I'm sure his flowhood has two AC motors.
A bit of troubleshooting should reveal what is causing the motors to shut down. It may be an internal over-temp sensor, or it could be a current(amperage/load) sensor in the controls, or it could be as simple as a mis-set timer if one is intsalled. If it pulls 16 amps, you'll need a #12 cord rather than #14. Good luck.
RR
--------------------
www.mushroomvideos.com
Ignorance is contagious. Boycott Walmart and watch your IQ go up.
RR
|
orchidfanatic
retiree
Registered: 08/12/07
Posts: 832
Loc: where the wild things are
|
Re: Laminar Flow Hood (w/ pic) [Re: RogerRabbit]
#7652016 - 11/18/07 06:41 PM (1 year, 1 month ago) |
|
|
well there are brushed AC motors I have one in my garage but the shaded pole motor on his flow hood is probably not brushed . I was thinking of starter motors for some reason ..duh
a plug in electric hand drill is a brushed AC motor.
|
ZeropointMind
Stranger
Registered: 08/28/05
Posts: 67
Last seen: 9 months, 21 days
|
|
Thank you, I appreciate the comments. I'll take a another look, and see what I can come up with..
|
fastfred
Registered: 05/17/04
Posts: 4,417
Loc: Dark side of the moon
|
|
I would check that your motors are wired correctly. They often have three different speed wires. If you run them either too fast or two slow they will run hotter. The motors also all have thermistors in them that will cause the motor to shut down when it overheats.
The motors are wired differently depending on what speed wire that you use. Each speed is designed to run the motor at a specific speed with a certain level of resistance/drag on it. Most people run into trouble by running the motor too slow, they should almost always be run on the high speed wire or at least the medium speed wire.
Here is a paper that will probably bore you on the subject of motor calculations, but you might also want to check out the site that it's from...
http://www.specamotor.com/pdf/overheating_white_paper.pdf
-FF
|
ZeropointMind
Stranger
Registered: 08/28/05
Posts: 67
Last seen: 9 months, 21 days
|
Re: Laminar Flow Hood (w/ pic) [Re: fastfred]
#7657221 - 11/19/07 11:37 PM (1 year, 1 month ago) |
|
|
I'll post some picks up tomorrow of what the wiring looks like.. I unscrewed the panel where the switches are.. there are three main switches.. 1 for the lights, and one for the left fan, and the other for the right fan. Looks like one of the motor switches went out, and someone reconnected the wiring where both mothers come on at the same time, with 1 switch. So presently, there two operational switches. The contacts (where the wiring meets the switch contacts) seems to have heated up, leaving some melted plastic on the contacts..So I guess overheating was an issue, with improper wiring? I would always smell a burning, but after not having this thing in operation, I figured it was just the fan being turn on for that first time, in awhile... No I see what it was.. that plastic tip cover was being heated up... Tomorrow I'll post some pics.. FF that's for that diagram, I'm gonna go read that pdf right now.. Hopefully it'll shed some new light on the situation. Until then.. take it easy!
|
ZeropointMind
Stranger
Registered: 08/28/05
Posts: 67
Last seen: 9 months, 21 days
|
|
Btw.... there was a Dayton oil capacitor laying on the inside of the hood... an extra perhaps? Where do these go?
|
orchidfanatic
retiree
Registered: 08/12/07
Posts: 832
Loc: where the wild things are
|
|
they go in the wiring to help them start up without too much of a current drain .. that could be the problem
|
ZeropointMind
Stranger
Registered: 08/28/05
Posts: 67
Last seen: 9 months, 21 days
|
|
The motors seem to be G.E. brand... model 5KCP39KG , 1/3 HP, 115v, 5 amps, phase 1, with 1075 RPMS.. I need to find some info on how to wire this thing, so i know that the wiring thats currently there, is correct. The capacitors are all connected. There is a knob to adjust speed, I believe it was raised and possibly created this problem, if the capacitors turn out to be in working order. I don't know how to change speed with wiring? This stuff I've never done before.. so its all new to me.. wish me luck..
|
orchidfanatic
retiree
Registered: 08/12/07
Posts: 832
Loc: where the wild things are
|
|
good luck and do not touch those caps they can pack quite a punch
|
ZeropointMind
Stranger
Registered: 08/28/05
Posts: 67
Last seen: 9 months, 21 days
|
|
Thanks for the heads up!
|
orchidfanatic
retiree
Registered: 08/12/07
Posts: 832
Loc: where the wild things are
|
|
here is mine
|
|
login or 
register to post messages and view our members-only content. You'll gain access to additional forums, encrypted messages, file attachments, board customizations, and much more!
Previous
Index
Next
Threaded
Edit 
Reply 
Quote 
