Best video i have seen on PSC especially with the wiring diagram. In my HVAC course they just handed out a PSC wiring diagram with only on main winding. Printing your diagram now. Thank you
I have learned a lot from watching your repair videos for a long time. I don't normally ever work on HVAC but this past week I did have to fix my Sister's unit. I posted a video on my channel. Please view if you get time and let me know how I did or if I should be aware of anything I might have missed. Thanks.
He said the run was common in the video and I'm sure the motor diagram refers to it as common. But traditional csr start and run Shar same leg the speeds are common in the picture with added resistor to step the voltage down to lower the speed
I'm replacing my blower motor in my Air Handler. The new motor is also a 220v but it has a white wire and the old does not. where does the white wire connect to? Thanks
It depends on the manufacturer. As a general rule, if there is a purple wire on the new motor, it is common. On the new motor, White is probably common. GFM
Your videos are amazing. I am considering swapping my ECM to a PSC. I want to use the multiple taps of the motor to connect to the ECM board and then have the variable speed. Those ECM motor modules are a pain, mine has failed. Genteq.
I think they are loop wired around, say 3 triangle spot for fasted speed. I taught this was about why blower resistance add motor speed to a degree and useing a speed controller. I find this fascinating. As I can't see the logic of the motor speeding up and fall of a Cliff. & stall out. LOL
This way of changing speeds only works with psc or cap-start, cap-run motors -> that leave the start winding in the circuit at all times? When changing the run winding resistance we are changing the phase angle between run and start winding and hense the motor slip?? This increase or decrease of motor slip is what changes the speed??? This may be getting too complicated, but i'm trying to understand better
Let me ask Grayfurnaceman, if I have the same wiring set up w multiple windings as your video suggests, can I just hook up to the shorter winding and thus increase my fan speed without doing anything else? Can I continue to use the same existing start capacitor!? I am not sure if I have the same multi winding motor as your video ( I pray I do and will check this evening) as we feel as though our fan doesn't blow with much force!! It would be awesome if we could speed this up this blowing harder!! Our bedroom vent "sucks" so to speak. Has so little force thus not cooling our bedroom as much..... We can switch out our entire HVAC system at this time however a simple switch like this of which winding to connect to would be awesome! I hope you see this Grayfurnaceman and respond! Your channel is very informative!
@@TreadTalk247 If there are colored wires coming from the motor, the highest speed will be the black one. If it is not connected to the cool terminal of the control board, remove and tape off the one that is connected and install the black one. Just to humor me, remove the filter and see if there is a change in air flow before changing wires. GFM
Ok sounds good, I thought I’d have time last weekend but it will have to wait till this Sunday. We recently bought an old car (1927 Buick) that’s been sitting since the prev owner passed away in 2004 and it’s been sitting ever since! We have been working our tails off getting it roadworthy again! But I’ll make some time this Sunday to check out the wiring on the fan. I actually replaced the blower fan about 10-12 years ago, the capacitor went bad when we weren’t home and burned up the blower motor, we came home to a burnt electric smell (you know the one!) so I replaced the capacitor and the motor so I’m curious if there is multi colored wires on the replacement motor I installed! I can’t remember!!
Also just curious will a capacitor that’s going bad keep the blower fan from getting to full speed? I was just curious from when it went bad before (10-12 years ago) and besides a slow start to the blower what other signs will be evident when the capacitor starts going bad??
Ducktruckful you shouldn’t get a spark, because it discharged into the windings when you shut down the power. If you want to see it changed, pull the wires off while live. Not recommended. A spark won’t tell you much anyway. You need to know if the capacitance matches the rating by measuring micro farads with a multimeter. The cap resists voltage drop, so as the sine wave falls on the power, the cap starts to output power. This kind of imitates 3 phase power by providing an out of phase wave so the motor can rotate
Let me ask Grayfurnaceman, if I have the same wiring set up w multiple windings as your video suggests, can I just hook up to the shorter winding and thus increase my fan speed without doing anything else? Can I continue to use the same existing start capacitor!? I am not sure if I have the same multi winding motor as your video ( I pray I do and will check this evening) as we feel as though our fan doesn't blow with much force!! It would be awesome if we could speed this up this blowing harder!! Our bedroom vent "sucks" so to speak. Has so little force thus not cooling our bedroom as much..... We can switch out our entire HVAC system at this time however a simple switch like this of which winding to connect to would be awesome! I hope you see this Grayfurnaceman and respond! Your channel is very informative!
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Best video i have seen on PSC especially with the wiring diagram. In my HVAC course they just handed out a PSC wiring diagram with only on main winding. Printing your diagram now. Thank you
Welcome
GFM
I have learned a lot from watching your repair videos for a long time. I don't normally ever work on HVAC but this past week I did have to fix my Sister's unit. I posted a video on my channel. Please view if you get time and let me know how I did or if I should be aware of anything I might have missed. Thanks.
The motor shown in the video was actually a four-wire motor, but the diagram was a three-wire. The motor speed tab(bk, yl, bl, rd)wires were common.
He said the run was common in the video and I'm sure the motor diagram refers to it as common. But traditional csr start and run Shar same leg the speeds are common in the picture with added resistor to step the voltage down to lower the speed
I'm replacing my blower motor in my Air Handler. The new motor is also a 220v but it has a white wire and the old does not. where does the white wire connect to? Thanks
It depends on the manufacturer. As a general rule, if there is a purple wire on the new motor, it is common. On the new motor, White is probably common.
GFM
Your videos are amazing. I am considering swapping my ECM to a PSC. I want to use the multiple taps of the motor to connect to the ECM board and then have the variable speed. Those ECM motor modules are a pain, mine has failed. Genteq.
I think they are loop wired around, say 3 triangle spot for fasted speed. I taught this was about why blower resistance add motor speed to a degree and useing a speed controller. I find this fascinating. As I can't see the logic of the motor speeding up and fall of a Cliff. & stall out. LOL
Say you only had a single speed motor what speed would you suggest wiring it to work the best for heating and cooling ?
I am probably not getting your problem, but if you have a single speed motor, you have no choice of which speed to hook up.
GFM
Both original and replacement run capacitor are same 12.5 MFD 440/370 VAC but new replaced blower motor has 7.5 MFD listed . Still good ?
If the new motor is rated for the 7.5 its ok.
GFM
Thanks for the video!
Welcome
GFM
This way of changing speeds only works with psc or cap-start, cap-run motors -> that leave the start winding in the circuit at all times? When changing the run winding resistance we are changing the phase angle between run and start winding and hense the motor slip?? This increase or decrease of motor slip is what changes the speed???
This may be getting too complicated, but i'm trying to understand better
great video. thanks
can you put a 3 speed motor where 4 speed is required as long as the other specs match?
Yes. You just have to match the speed to the application.
GFM
My issue is I’m not an HVAC tech. So I don’t have a cost effective way to get replacements.
Let me ask Grayfurnaceman, if I have the same wiring set up w multiple windings as your video suggests, can I just hook up to the shorter winding and thus increase my fan speed without doing anything else? Can I continue to use the same existing start capacitor!? I am not sure if I have the same multi winding motor as your video ( I pray I do and will check this evening) as we feel as though our fan doesn't blow with much force!! It would be awesome if we could speed this up this blowing harder!! Our bedroom vent "sucks" so to speak. Has so little force thus not cooling our bedroom as much..... We can switch out our entire HVAC system at this time however a simple switch like this of which winding to connect to would be awesome!
I hope you see this Grayfurnaceman and respond! Your channel is very informative!
Before changing fan speeds, I would check the filter, be sure the A/C coil is clean, the blower wheel is clean and the ductwork is in good shape.
GFM
It is, I only use top quality filters and make sure they are changed, I just have to check to see if our motor has the wires for multi speed windings
@@TreadTalk247 If there are colored wires coming from the motor, the highest speed will be the black one. If it is not connected to the cool terminal of the control board, remove and tape off the one that is connected and install the black one. Just to humor me, remove the filter and see if there is a change in air flow before changing wires.
GFM
Ok sounds good, I thought I’d have time last weekend but it will have to wait till this Sunday. We recently bought an old car (1927 Buick) that’s been sitting since the prev owner passed away in 2004 and it’s been sitting ever since! We have been working our tails off getting it roadworthy again! But I’ll make some time this Sunday to check out the wiring on the fan. I actually replaced the blower fan about 10-12 years ago, the capacitor went bad when we weren’t home and burned up the blower motor, we came home to a burnt electric smell (you know the one!) so I replaced the capacitor and the motor so I’m curious if there is multi colored wires on the replacement motor I installed! I can’t remember!!
Also just curious will a capacitor that’s going bad keep the blower fan from getting to full speed? I was just curious from when it went bad before (10-12 years ago) and besides a slow start to the blower what other signs will be evident when the capacitor starts going bad??
Gray ! do you have any info on how a cap. works? I have a motor that is slow to start. I don't get a spark
when terminals are shorted across cap.
Ducktruckful you shouldn’t get a spark, because it discharged into the windings when you shut down the power. If you want to see it changed, pull the wires off while live. Not recommended. A spark won’t tell you much anyway. You need to know if the capacitance matches the rating by measuring micro farads with a multimeter. The cap resists voltage drop, so as the sine wave falls on the power, the cap starts to output power. This kind of imitates 3 phase power by providing an out of phase wave so the motor can rotate
Might want to brush up on the terms impedance and resistance
thank you, great video
bradley morey Welcome
GFM
Thank you gfm.
Thanks GFM
Thanks
Welcome
GFM
what does the term psc mean?
Ozzstar It stands for permanent split capacitor, the capacitor stays connected during motor starting and subsequent running.
You mixed up the blue and yellow
thank ye...
Let me ask Grayfurnaceman, if I have the same wiring set up w multiple windings as your video suggests, can I just hook up to the shorter winding and thus increase my fan speed without doing anything else? Can I continue to use the same existing start capacitor!? I am not sure if I have the same multi winding motor as your video ( I pray I do and will check this evening) as we feel as though our fan doesn't blow with much force!! It would be awesome if we could speed this up this blowing harder!! Our bedroom vent "sucks" so to speak. Has so little force thus not cooling our bedroom as much..... We can switch out our entire HVAC system at this time however a simple switch like this of which winding to connect to would be awesome!
I hope you see this Grayfurnaceman and respond! Your channel is very informative!