Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 08-01-2011, 05:24 PM   #16
Newbie
 
Join Date: Aug 2011
Posts: 1
Rewards Points: 10
Default

Capacitor size differences


I would change the cap out when your back there, but to be honest if the comp seems to start/run ok it wouldnt really bother me to have a cap that was 5 microfarads off from original, hell its probly still within tolerance of the original, if you were to test it on a meter, they are typically rated +/- 10%. I would rather see 40 (slightly higher) than 30(lower) if it were me.

Brick is offline   Reply With Quote
Old 08-01-2011, 06:58 PM   #17
Hvac Pro
 
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 9,815
Rewards Points: 2,768
Default

Capacitor size differences


Quote:
Originally Posted by Doc Holliday View Post
I understand both the Copeland Scroll book (which I've never seen) and the stated info on a motor concerning it's respective cap (which I see daily) but if all the data was sun dried off of the unit, the compressor and the condenser fan motor as well as the capacitor and you had no idea what make the unit was, what then?

New unit?
If it ran for quite a few yrs with the wrong cap then it probably is ready to die shortly anyway and you will be selling a new unit. Odds of the previous tech being that dumb or negligent and you running into it are probably less than 1%.
__________________
"Cut it twice and it is still too short".
yuri is online now   Reply With Quote
Old 08-01-2011, 07:08 PM   #18
I'm Your Huckleberry
 
Join Date: Mar 2011
Posts: 5,876
Rewards Points: 2,204
Default

Capacitor size differences


Quote:
Originally Posted by beenthere View Post
I don't run into too many 1940s units, so I'm not sure what I would do.


I just thought that there was a formula for figuring out the correct size cap for a motor. Just curious but no worries, I always call the supply house with the unit model numbers to find out.
Doc Holliday is offline   Reply With Quote
Old 08-01-2011, 07:30 PM   #19
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,060
Rewards Points: 3,784
Default

Capacitor size differences


Quote:
Originally Posted by Doc Holliday View Post


I just thought that there was a formula for figuring out the correct size cap for a motor. Just curious but no worries, I always call the supply house with the unit model numbers to find out.
There is a formula. I don't remember it anymore, as I recall though. You need to know the RPM and displacement of the compressor though.
beenthere is online now   Reply With Quote
Old 08-01-2011, 07:38 PM   #20
Hvac Pro
 
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 9,815
Rewards Points: 2,768
Default

Capacitor size differences


pie/R/squared

__________________
"Cut it twice and it is still too short".
yuri is online now   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Differences between these light switches? argh Electrical 11 11-02-2010 10:12 PM
Questions on tiling a floor abefroman Flooring 25 07-28-2010 11:18 PM
Home showers' differences? MagicalHome Appliances 0 07-06-2010 12:19 PM
Differences in Graco Lines wiz561 Painting 1 03-07-2010 09:19 AM
Differences between SW Duration, Superpaint and Cashmere? Autumnknight Painting 2 03-08-2007 09:55 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.