furnace blower hookup

[imperialman]

Lucky me I just had a new furnace and a/c installed in the house today.

I have the old furnace blower.I want to mount it on a piece of plywood ,put a plug in cord on it and use it in my garage . The problem is that there are too many wires for me to deal with. I know red and black ,but that is about it.
Ideally I would also like to put some sort of rheostat to control the speed of the blower ,though I don't know if that is possible . Has anyone ever done this to a 80's Carrier furnace blower?

 

[trbomax]

Its a multi speed motor,different combinations give different speeds. Either on the blower or inside the furnace will be a wireing diagram showing the connections. I suspect you will want "high" if your useing it as a circulater.

 

[brewchief]

Connect the white wire and one of the others, that's a four speed motor, it should go pretty much like this,
Red=low speed
Yellow= med low
Brown= med high
Black=high speed

You also need to block of part of either the inlet or the outlet or the blower will grab to much air and overload and let the magic smoke out, I've had good luck blocking the inlet side opposite of the motor off in the past.

 

[TOOL MASTER]

just stick a hamster in it........

 

[trbomax]

What chief said. I had one like that I've been saveing that I tagged before I put it away. I also took a pic of the wireing diagram on the furnace before I scrapped it. I went down and looked it up.

 

[imperialman]

Hmm I suspect the diagram is in the hvac guys truck and back at the shop by now.
Thanks for the tip about blocking part of the inlet !

 

[rickairmedic]

Ok in your first Pic that shows the motor . I can see the motor tag and on that tag is the wireing diagram for the motor . I would say White = neutral and Black= High speed which is the only speed I would use .


Rick

 

[Kevin54]

Is that 230 or 115v? The reason I ask is because isn't that a starter capacitor on top? If so, isn't a starter capacitor solely used with 230v? Wouldn't that make the wiring a little different? I know...all questions and no answers. The only reason I ask is that I have a squirrel cage and motor with 5 wires and it's 115v.

 

[KCarGuy]

For the longest time, I had one that my neighbor gave me.
He had built a Plywood box, where the Blower unit was bolted inside.
The Exhaust portion was left open (of Course), and the front (or Intake) was open and setup with aluminum channels, so a furnace filter could be slid in.

This was then screwed into my ceiling of my garage and would filter and circulate air.
It worked well.
Oh, and I had it set up on the slowest setting (high was too much).

 

[rickairmedic]

Is that 230 or 115v? The reason I ask is because isn't that a starter capacitor on top? If so, isn't a starter capacitor solely used with 230v? Wouldn't that make the wiring a little different? I know...all questions and no answers. The only reason I ask is that I have a squirrel cage and motor with 5 wires and it's 115v.

As long as it came out of a gas furnace it is 120V Most of them have start capacitors regardless of voltage .


Rick

 

[imperialman]

The furnace guy said it was 115v

 

[imperialman]

For the longest time, I had one that my neighbor gave me.
He had built a Plywood box, where the Blower unit was bolted inside.
The Exhaust portion was left open (of Course), and the front (or Intake) was open and setup with aluminum channels, so a furnace filter could be slid in.

This was then screwed into my ceiling of my garage and would filter and circulate air.
It worked well.
Oh, and I had it set up on the slowest setting (high was too much).

Probably hard to see much of it in the picture ,but the blower is sitting on the hood of my hopefully soon to be epoxy primed 67 imperial.
That is the reason I had the furnace guy leave me this blower when they changed out my house furnace.
I am also going to put some sort of filter in front of the blower intake and probably the blower exhaust also

 

[CCMullen]

Glad I found this thread. Salvaged my old blower motor today. I hope to use it in my building to circulate air this summer.

 

[KCarGuy]

I am not sure if the Photo will show up or not...But here is what I did with Mine.

 

[CCMullen]

Yes, your pictures showed up fine, and they are a big help. Does yours vent to the outside of your shop?

 

[Wiredude44]

just be sure to tape off or insulate any unused wires because they will have back feed voltage on them when blower is running...(dont ask how i know this)

 

[zoomzoomjeff]

I've got one of those too. Hella output.

I don't understand blocking part of it off though. Could someone provide more detail on that? I've been running it for a few years now with no prob. (in the garage during the summers) I do, however, tilt it down about 10 degrees to provide some "pushback" on the airflow, so it stays running a constant speed. Otherwise, the airflow gets kind of choppy or buffeted.

 

[KCarGuy]

Mine vents right out of the side garage window.

 

[metalTobman]

You probably don't need to restrict the intake of the blower if you have a box around it with a filtered opening. Those units are designed to have a bit of restriction on them, if it is run wide open without intake restriction the motor works harder and may over-amp which will burn it out prematurely.
Easy to check, just look at the data decal on the motor for the amp rating, then use an amp meter on the power wire (black is high speed) if the reading is higher than the rating on the decal you need some or more restriction on the intake. Don't restrict the air flowing over the moto,r that could cause it to run too hot.