using your old furnace blower.

Furnace blowers , [e-mail]

[@user-su5ft8lc9q]

Man you Sire are a GENIUS, your wife owns some special attention tonight at supper. Desert of your choice

[@Roadhvac]

LOL

[@Geminiappleboy]

This was amazing! Thank you!

[@Roadhvac]

Glad it was helpful!

[@FBGCHANNEL]

I have a 4 ton blower from an amana furnace set up and she works good

[@Roadhvac]

I'm sure that's pushing a lot of air.

[@JakeAndBeastBoy2002]

Just like a hurricane

[@ddb1143]

Question 1: If I use a furnace blower for sucking out welding fumes in about 4 points of use, all at the same time, is that enough restriction to make the motor work hard enough (avoid free-wheeling) so it doesn't draw high amperage? Question 2: Should I design a filter to create some resistance, but also lower the amount of unfiltered, dirty, welding smoke that makes it to the fan blades?

[@Roadhvac]

Just restric the exhaust of the blower. And yes, filter the intake . Maybe build a box to put the blower in.

[@ddb1143]

Yes, I did build a metal box that the blower is mounted in. It is completely enclosed but with 8" duct ports on each side that line up with the fan diameter. The exhaust port is also the other hole in the case, same square size as the fan exhaust hole. Thanks for your video and input. I will measure the amp load when it is being used at each of the 3 speed line conductors. What do you suppose are safe amp loads? 1/2 hp Century motor. The filters are inside at the 8" ports. First is a metal pre-filter to catch any possible sparks, then a paper filter, merv 8. The filters are 10" x 10" x 1" thick each. They are mounted with metal pcs. to keep them in place and are easy to replace.

[@Roadhvac]

The maximum amp draw should be specified on your motor tag if it is still readable it can very. usually no more than 6.6 amps.

[@troysleeper3282]

I have a 230 voltage fan blower motor and it is a A o Smith fan blower motor and I was wondering on the wire diagram on the motor it says that the line wire is the yellow line wire and between it is the blue wire with a line between the yellow and blue wire would I hook those to wire to gather I have a 2 wire setup and I want to use the red wire for low speed.

[@thisisyourcaptainspeaking2259]

You didn't mention the capacitor.

[@Roadhvac]

Easier if I could see the diagram on the side of the motor

[@Roadhvac]

except you let a furnace blower run long enough with no load and it will burn up the motor unlike a vacuum. because your amp draw will be too high.

[@undaya]

i removed and cleaned at car wash.

[@Roadhvac]

That sounds great. Just make sure to dry out the motor well before you power it up.

[@Steve-um5mm]

Why does restricting air flow make the fan speed up?

[@Roadhvac]

This is a direct drive motor out of a furnace that is figured for heat exchanger restrictions. Unlike Pulley driven motors. Direct drive motors need back pressure in order to run at its desired amp rating.

[@petejohnson8397]

it is counterintuitive, but the power used is a function of the amount of air moved. take a shop vac or regular vacuum and block the intake with your hand. listen to the motor spin faster. no air movement. no or less work being done so less load on the motor.

[@Steve-um5mm]

Thanks for the info, learn something every day!

[@achdiagnostic7773]

It's all about load. The motor is going slower because of load. When you restrict the flow the load decreases causing the motor to run at a higher rpm. CFM is not really increasing but velocity is.

[@billyclough7500]

How much they sell for?

[@Roadhvac]

You should be able to pick one up for 20/30 dollars. Any furnace replacement. Usually, the blower motor is always good.