
FlOw j0Bs anD chEap bLows...questions [merged]
#21
Posted 11 November 2006 - 10:57 PM
The high/low switch...I can't tell you, because I'm not certain what it is composed of.
If the hi/low is just a triac/SCR or some other kind of silicone device that is bleeding amperage under load, it isn't good for the motor.
If it is a coil type device that is limiting current through resistance, it won't hurt the motor at all.
Those are huge oversimplifications, by the way.
The easy way to tell if you should use a speed control is how much it costs. If it costs less than $10, it is silicone based and bad. If it costs in the $30-$200 range, it is a rheostat and it is good.
#22
Posted 11 November 2006 - 11:15 PM
Wiring is easy enough, just plug it in. Or you can get the cheaper one and rewire your switches. Thats easy too.
Considering what fans cost at grainger, seems like a good deal. Those fans run for ever. Better than my fan...
#23
Posted 11 November 2006 - 11:25 PM
I would buy the "blank" one and wire it myself, but I'm comfortable with wiring.
#24
Guest_MycoGod_*
Posted 12 November 2006 - 01:02 AM
As for the blower, it looks like a silicone based deal. I know because I have one from that very supplier and it's already doing some damge I think. Try this: http://cgi.ebay.com/...1QQcmdZViewItem
I use one for my 24x12 and it works great. They have a 600 cfm that I'm told will work for a 24x18
#25
Posted 12 November 2006 - 08:38 AM
"The motors on the blowers have 3 taps on the winding that select the hp rating of the motor and of course the speed of rotation. The blowers were removed from retired heating equipment that were rated 1 IWC with all the duct work in place."
Does that mean there are three sets of wires for different speeds, or is it some kind of control?
#26
Guest_MycoGod_*
Posted 12 November 2006 - 10:21 AM
This blower, http://cgi.ebay.com/...1QQcmdZViewItem
Or this blower, http://www.fungi.com/tools/fans.html (it's the all purpose blower). Both of these would be fine on a 24x12, and they are both brand new with warranty.
As for the 24x30, one of the Ebay ones you talked about would work, but I am just a little skeptical about them. This blower, http://www.fungi.com/tools/fans.html (FP's Universal Blower), would work well for the 24x30. This one, http://www.emeraldel...D/1806/file.htm
might work. Good luck!!
#27
Posted 12 November 2006 - 11:50 AM
I asked the seller how different speeds are set up on these blowers and this is what he replied:
"The motors on the blowers have 3 taps on the winding that select the hp rating of the motor and of course the speed of rotation. The blowers were removed from retired heating equipment that were rated 1 IWC with all the duct work in place."
Does that mean there are three sets of wires for different speeds, or is it some kind of control?
That means there will be four (or five) wires coming out of the motor. Hopefully the wires will be different colors. Then you can find somebody who knows how to wire HVAC blowers to tell you what the colors mean.
You should ask the seller if there is any kind of wiring diagram on the motor's housing or if he could provide you with a basic diagram.
I can almost guarantee you that a single switch to work those five wires won't come with the blower.
#28
Posted 12 November 2006 - 12:00 PM
I'll find out from the seller about a wiring diagram.
>> yer FriEnd, nAscaR denDriTE duDLEy
#29
Posted 12 November 2006 - 01:36 PM
I just use it on high, i dont mess with the switch or nothin.
You know, you dont need a rheostat or anything to control the output of the blower. You can simply add more prefilters and even partialy block the prefilters to limit airflow. As long as its close to what you need and a little overpowered you will be golden! You could just hard wire the blower with no switch or anything just a power cord and just plug it in when you wanted if you wanted to.
#30
Guest_MycoGod_*
Posted 12 November 2006 - 02:40 PM
#31
Posted 12 November 2006 - 04:10 PM
#32
Posted 12 November 2006 - 10:31 PM
"I use solid state speed controls especially made for this SPC motors. I know of previous buyers that have used dimmer switches but I am not sure how well they works. "
>> Heh heh.. sound like he needs to works on grammar.
Does this sound OK to you guys? He is offering the two that i need for $170 including shipping, and that is an excellent price.
Let me know if you guys think i should go with these blowers.
BiggEst hUGS, and thanks for all your help. >>nAscaR denDriTE duDLEy
#33
Guest_MycoGod_*
Posted 12 November 2006 - 11:29 PM
#34
Guest_MycoGod_*
Posted 15 November 2006 - 12:43 AM