Calendar

July 2017
SunMonTueWedThuFriSat
 << < > >>
      1
2345678
9101112131415
16171819202122
23242526272829
3031     

Announce

Who's Online?

Member: 0
Visitor: 1

rss Syndication

19 Apr 2015 

Get started with work in HVAC with Learn HVAC

Cooling compressor motors are extremely easy to diagnose but are often mis-diagnosed by brand-new air conditioning professionals. If you find that an Air Conditioning compressor is getting the proper voltages, has excellent capacitor, and will certainly not run or is tripping the breaker, it might be that the motor windings are the problem.


There are only 3 motor winding failures:


[Compressor Conntection] Open Winding - This is when one of the wires that make up the motor windings is broken or separated.





Shorted Winding - If the insulation on the windings has failed, in some cases one part of the winding is making electrical contact with another part of the winding.


Grounded Winding - This resembles the shorted winding but the wire with the busted insulation is making electrical contact with the compressor housing or ground.


If you suspect it has failed, here is how to check the compressor motor;


Disconnect power




Eliminate the top of the outdoor condensing unit


Disconnect the 3-prong plug on the compressor


Set your multimeter to ohms


Step and record the resistance (ohms) measurement of each winding


An excellent motor will check out something like this:


Pin 1 to Pin 2 - 3 ohms


Pin 2 to Pin 3 - 6 ohms


Pin 1 to Pin 3 - 9 ohms


The least expensive reading should be listed below 10 ohms (this is the run winding).




The 2nd greatest reading ought to have to do with 2-4 times greater than the lowest reading (this is the start winding).


The greatest reading must be the sum of the resistance checked out throughout the 2 smaller windings


If any of these readings check out unlimited or over variety on your ohm meter, you have an open winding. A reading of zero ohms shows a brief in a winding.


If you find all the ohm measurements are appropriate:


Set your ohm meter to its greatest variety


Location on meter lead on the metal case of the condenser (ensure you scrape of any rust or paint to make certain excellent contact).


Procedure each pin to the ground.




Any measurement that does not check out infinite shows a grounded winding.


These measurement are oftentimes very difficult to make since there is generally a shroud around the compressor terminals and you need to base on your head to get to them. If you can, find a scrap Air Conditioner unit at your facility and grab a compressor plug and strip the 3 wire ends. Then when you remove the compressor plug you can plug-in your plug with the bare wires and easily make your resistance measurements.


Keep in mind - If you presume you have an open winding, make sure the compressor isn't overheated (touch it). Numerous good compressors are replaced due to this error.


More about HEATING AND COOLING?


When your professional pertains to repair your system or set up a brand-new one, he needs to walk around your home and investigate exactly what's happening with your present set-up. They need to be looking for just how much insulation you have, where your windows are and exactly what quality they are and more.


Do you hear a clicking sound when your fan is turning? This might imply that there is something in the way of the blades of the fan. If it gets so bad that the blade flexes, you must replace it, just unbending it will certainly leave the fan unbalanced and can trigger more problems.


When you have an outdoor device, make sure to keep all plants, flowers, shrubs and trees a minimum of 2 feet from it. Anything that grows inside it, either above the ground and even roots below the soil, can block it up and trigger it to break. Provide it some breathing room.


A great location to place your compressor system outside is in a shady area. The cooler air entering the system will require less work to obtain to the proper temperature level.


Now you comprehend why it is essential to keep the HVAC system working effectively. Absolutely nothing good will come out of you disregarding all of the concerns that take place. Nevertheless, this article has given you the recommendations you have to ensure your HVAC system is always running effectively.


These measurement are often times very tough to make because there is usually a shroud around the compressor terminals and you have to stand on your head to get to them. If you can, find a scrap Air Conditioning unit at your store and grab a compressor plug and strip the 3 wire ends. When you get rid of the compressor plug you can plug-in your plug with the bare wires and easily make your resistance measurements.


Note - If you think you have an open winding, make sure the compressor isn't overheated (touch it). Lots of good compressors are changed due to this mistake.

Admin · 5 views · Leave a comment
11 Jan 2015 

Welcome

Congratulations, your blog is created !
To access the different options of your Blog, click on Connection : Connect yourself with the username : Admin and your password (the one you chose at the blog creation).
Once you're connected, a toolbar will be placed automatically at the top of the page, managing you to access the administration panel.

(This text is an example of an article, you can delete it as soon as you wish)
Admin · 2 views · 1 comment
Categories: First category

Previous page  1, 2, 3, 4, 5, 6, 7, 8, 9