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FRIDGE COMPRESSORS AND PTC RELAYS

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FRIDGE COMPRESSORS AND PTC RELAYS

Unread postAuthor: POLAND_SPUD » Sun Feb 05, 2012 6:32 pm

Quite a lot of ppl have problems with wiring their fridge compressors - I'll describe how to wire a Danfoss 103n0011 PTC starting relay properly as this is probably the most popular model that fits vast majority of fridge compressors

Danfoss 103n0011 PTC is a starting relay - it has everything you need to wire a fridge compressor: it acts both as a starting relay and motor protection circuit so you can have both in a nice compact package
Image
I got one for about 4$ - I know this part is often overpriced but it really isn't worth 20 pounds or so - if someone asks for that much it's a rip off

I've seen them for 10$ on ebay


The relay is attached directly on the three pin connector on the compressor case.
There are two types of connectors that you can find on fridge compressors:
A) danofoss connector (two prongs at the top one at the bottom - shown in one of the pics)
B) so called electrolux connector (same as danfoss connector but rotated by 180 deg)

It will work on both types - just make sure it is mounted vertically not diagonally or something

Now how to wire one ??
Here is a pic of the PTC relay seen from the top. There are 3 connectors there labled L (for line), N (neutral) and C
CLICK TO SEE THE PICTURE - for some reason it doesn't display properly

To wire one you have to connect line/hot/phase wire from the cable to L one the relay. Then attach neutral wire to N on the relay... Sounds fairly easy huh?

In order to switch the compressor ON you have to run a wire from L to C - that's where a thermostat is normally mounted - and that's where you should put an ON/OFF switch

the compressor won't work unless there is a direct connection between L (hot/line) and C on the PTC relay


EDIT
Oh and here is a video on testing PTC relays to see if they are in wokring condition
[youtube]http://www.youtube.com/watch?v=ZTKpYdFKPFE[/youtube]
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Attachments
3 pin.jpg
danfoss 3 pin/prong connector
3 pin.jpg (3.69 KiB) Viewed 12329 times
wiring.PNG
it's based on colour codes used in poland (applicable to European Union (EU), Australia, South Africa (IEC 60446)) - check this wikipedia article to check standard colours used in your country >>>> http://en.wikipedia.org/wiki/Electrical_wiring )
wiring.PNG (13.71 KiB) Viewed 12329 times
Last edited by POLAND_SPUD on Sun Sep 15, 2013 6:48 am, edited 3 times in total.
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Unread postAuthor: jackssmirkingrevenge » Mon Feb 06, 2012 12:53 am

Nice one, cheers!
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