Thermostatic Controls - VisionPro IAQ and Dayton Shaded Pole Blower

Is it possible to hook up just a single blower to a VisionPro IAQ? I have no electrical experience so the instructions are not making sense to me. I just want to use it to control an exhaust fan. Have the blower come on when a certain temperature is reached. Thanks

Yes, although that is a rather expensive control for just a blower. You may need an intervening control relay between the EIM and the blower.

Why not describe the entire project and I can give you a more detailed answer.

Actually if it requires me to spend more money I would rather not. I picked up the unit at a yard sale for a couple bucks and am just trying to find a use for it. I will probably just sell it. It is brand new, never used so I imagine it is worth some money.

Is there a way to test it to make sure it works?

The VisionPro IAQ is a two-piece system. You have to have both the thermostat and the equipment interface module (EIM) in order to use it.

Here are the installation manuals.
http://customer.honeywell.com/techlit/pdf/PackedLit/69-1823EFS.pdf
http://customer.honeywell.com/techlit/pdf/PackedLit/69-1816EFS.pdf

You would need a 24 volt AC transformer to power the EIM, a three-conductor connecting cable between the two units and a set of test lights or a multimeter to check the relay contacts as you cycled through the various thermostat functions. Retail price on the thermostat and EIM package is about $250-$300.

Thanks Furd, would a 24 volt AC transformer also work to run the blower? It is a Dayton Blower I use for ventilation in my basement. I was hoping to have it come on at a certain temperature. The blower has only two wires, a black and white and it is grounded to the unit into a three prong plug. I just don't understand how I would hook something like this up. Do I need something expensive?

No, the blower motor will need line voltage (Look at the plate if it's 110 volts, or 240 volts.)

You will need to put a relay in between the two.

Are you trying to run the fan to come on a warmer temp, and shut off at a lower temp? They do make line voltage stat for this.

I would put the IAQ on your HVAC equpment if I were you since the IAQ does a lot of other things.

The voltage of the blower motor is 110. And yes, I want it to come on when a high temperature is reached, and turn off when it drops.

You would need a relay with a 24 volt AC coil. Connect the coil leads to C and Y on the EIM. Wire the normally open contact of the relay in series with the power supply to the blower. Use the cooling function of the thermostat.

I agree with Jay that a cheaper "close on rise" line voltage thermostat would work as well and then you could use the VisionPro IAQ for your furnace and A/C where it would be a superior thermostat.

When you say 24 volt relay, are you talking about something like this Fan Relay 24 Volt Coil 90380 (http://www.ecrater.com/product.php?pid=2239845)

Yes, that would work just fine. You will need to mount it in an enclosure in order to cover the exposed terminals.

How about this one Lot 2X Nais Relays SPDT 20A 24V/24 Volt DC Coil #129 - eBay (item 260422477481 end time Aug-02-09 16:04:38 PDT) (http://cgi.ebay.com/Lot-2X-Nais-Relays-SPDT-20A-24V-24-Volt-DC-Coil-129_W0QQitemZ260422477481QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3ca263a6a9&_trksid=p3286.c0.m14)

or

STEVECO 90-290 SPST FAN DUTY RELAY 24:VOLT COIL 92499 - eBay (item 190289612459 end time Aug-24-09 13:42:02 PDT) (http://cgi.ebay.com/STEVECO-90-290-SPST-FAN-DUTY-RELAY-24-VOLT-COIL-92499_W0QQitemZ190289612459QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item2c4e250eab&_trksid=p3286.m20.l1116)

Why don't you get a line voltage t-stat, simple.

With the IAQ, you need relay, low voltage transformer, lot of extra wires (mess) and box to hide this.

And that IAQ has LOT of stuff on it that you won't be using... So why don't you use that on your furnace, and A/C system?

If you are really mind locked on putting the IAQ on this fan, then the Stevco is what you want.

Why don't you get a line voltage t-stat, simple.

With the IAQ, you need relay, low voltage transformer, lot of extra wires (mess) and box to hide this.

And that IAQ has LOT of stuff on it that you won't be using... So why don't you use that on your furnace, and A/C system?

If you are really mind locked on putting the IAQ on this fan, then the Stevco is what you want.

I have one line voltage T-stat I just bought, but am thinking of returning since I got the IAQ for $4. The other cost $75, so I would save some money. But maybe I will just sell the IAQ on ebay. Especially, if I get you right, I have to buy two things to get this to work. A relay and a low voltage transformer. Am I understanding that correctly? The relay is only like $8 so I don't mind that, but I don't want to have to buy anything else.

That is correct, you'll need the relay and a transformer.

Then you need ot build something to protects all the wire that goes onto the relay since the post are going to "hot" and if kids are around they may get zapped.