Can blower wheel work when installed backwards

[Infohunter88]

On service call, high limit keeps cutting out after about 10 minutes , looks like blower wheel might be installed backwards, but the locking nut is on the oposite side of the motor and I can not see or feel the motor side to see if it has 2 locking nuts, although I have never seen one with 2 ,but there is lots of things that I have not seen ,but they exist

I would think that if it was installed backwards that it would not run that long before tripping high limit, any body run into similar situation??????

[rlj1117]

if you have cw wheel on ccw housing then yes it would trip high limit, also check the size of wheel, i came across one where someone had installed wrong diameter, the only way i found problem so soon is because they left old wheel in bushes beside unit. hope this helps

[Infohunter88]

Yes that helps, Refresh my memory , you determine cw or ccw by looking at motor from shaft end, correct?

Is it possible to turn wheel around, or must it be replaced, I am thinking replace ???

[frigetater]

no there is another way.....hint..it's in the yellow pages

[smokin68]

no there is another way.....hint..it's in the yellow pages


Much easier too.......

[HVAC Teacher]

you are correct - looking at the shaft

[Infohunter88]

EASY frig and smoken, and thanks teacher.

I guess some of these guys forget when they just got in the business, or were they just born with all the correct answers.

[frigetater]

IF you're in the business..get the pro status and you'll get all the help you need..if not you are messing with dangerous equipment

[Infohunter88]

I am, I have just now had enough posts to qualify for pro forum,

I would uderstand your deep hearted concern if this were electrical issue.

Easy frig, this is not rocket science, just not came accross this before.

feal free to quiz me on something complicated if you think I am a HO.

[Mr Bill]

looks like blower wheel might be installed backwards


Not trying to add fuel to the fire here, but even a real new tech should be able to just look at the blower wheel and determine in 30 seconds or less if the thing is turning or installed the wrong way. :D

[Infohunter88]

oopps, it took me 31 seconds, I guess I am a real winner huh, I know your type. hehehehehehehehe

[t527ed]

could be wrong blower wheel, could be reversed motor. :cool:

need to look at housing to see which one.

[Infohunter88]

thanks for the input, it turned out to be wrong wheel, Motor was original and correct rotation

looking at them side by side it became clear, I never forget this one, thanks all....

It is fun to cut up a little on this forum, hehehehehehehe

[Roscoe]

oopps, it took me 31 seconds, I guess I am a real winner huh, I know your type. hehehehehehehehe


ahhhhhhhhhhh you just got the required amount of post to qualify for application to the pro area,You may want to read the line under bills name,,,,,ah yep that would be Membership Committee You may want to relax a little,,,,,,,,,,
, be friendly there just razzing ya.:D



and yeah what the rest of them said

jmo

[Mr Bill]

ahhhhhhhhhhh you just got the required amount of post to qualify for application to the pro area,You may want to read the line under bills name,,,,,ah yep that would be Membership Committee You may want to relax a little,,,,,,,,,,
, be friendly there just razzing ya.:D
and yeah what the rest of them said

jmo


O heck I am only one vote out of three, but the decision has to be unanimous
what does that mean? :eek: :D

[tinknocker service tech]

O heck I am only one vote out of three, but the decision has to be unanimous
what does that mean? :eek: :D



sound like someone may need a tie breaker heheheheheheheh:D :D :D

[Roscoe]

thanks for the input, it turned out to be wrong wheel, Motor was original and correct rotation

looking at them side by side it became clear, I never forget this one, thanks all....

It is fun to cut up a little on this forum, hehehehehehehe

;)

[rlj1117]

Insecure

[Roscoe]

Insecure

Well then just suck your thumb and get your blanky it'll be ok...:D

[lifer74]

Can we assume that airflow, has been verified? checked for duct restrictions. filter is clean, sometimes h.o 's install another filter system.

Is the wheel "powdered" or so full of dirt that you can't tell concave from convex. if so you will definitely have an airflow problem.

Evaporator coil clean? if air conditioning installed.

Is manifold gas pressure correct, and not overfiring?

10 minutes is an unusually long time for the high limit to trip.

does the motor make a louder than normal noise? if so does it have any side play? capacitor verified?

[Mr Bill]

Can we assume that airflow, has been verified? checked for duct restrictions. filter is clean, sometimes h.o 's install another filter system.

Is the wheel "powdered" or so full of dirt that you can't tell concave from convex. if so you will definitely have an airflow problem.

Evaporator coil clean? if air conditioning installed.

Is manifold gas pressure correct, and not overfiring?

10 minutes is an unusually long time for the high limit to trip.

does the motor make a louder than normal noise? if so does it have any side play? capacitor verified?

What in the world are you talking about? or are you just rambling on? the guy went up into the attic pulled the blower door off and looked at the blower wheel and was trying to determine if the blower wheel was turning in the right direction or not, and it was not it, the problem was the wrong blower wheel was installed you have to read the whole thread to know whats happening sometimes. :rolleyes:

[Infohunter88]

Hey, This is way too much fun, I wish I had more time to sit here and play but someone has to do the work.

This unit had more problems than just the blower wheel, the wheel was just the only thing I mentioned,

1 The return was way undersized---- corrected

2 Restriction where the supply plenum met trunk------corrected

3 12 inches WG at manafold (hardfire) ------ corrected to 10.5 " WG

4 ccw wheel installed 4 months ago, Probably by frig hehehehe --corrected

5 Happy HO

[lifer74]

Sorry.. I usually just skip the "banter" in a thread guess I should read it all, sometimes there is something useful in the middle! I'll put myself in the corner, and send myself to bed early without dinner.

[Roscoe]

Does your a$$ hurt from that spanking.....:eek: .....:D

[lifer74]

no, I run when I see the belt come out!

[Mr Bill]

Sorry.. I usually just skip the "banter" in a thread guess I should read it all, sometimes there is something useful in the middle! I'll put myself in the corner, and send myself to bed early without dinner.

Sorry, I am usually a little more gentler with my responses but I was having a bad hair day last night, work just picked up all of a sudden and I was having fun at the moment in the cruise control mode, and all of a sudden I had to flatfoot it. :D

[Midwest]

Had that very thing happen only once. Incorrect wheel from the factory- supplier didn't believe it until I showed him the wheel I removed. Took a quick look to find out wheel was turning proper direction, but the fins were pointing the wrong way. Testing temp rise during stage of installation was the first clue there was a problem. Limit cutting out was the second. Looking the blower assembly over well uncovered the truth.

[Tinner66061]

no

[Infohunter88]

Hey midwest, Just wondering about how long did that unit run before tripping high limit, and what brand was yours. Mine was 8 to 10 min.

I was a little serprised that it would move enough air to last that long.

my temp rise was 100 to 115 and climbing when high limit cut out.

new wheel temp rise = 50 to 55