Fridge Compressor Wiring and Airline Configuration.

[rna_duelers]

I have a working fridge compressor in my shed which I would like to wire up so it can be used readily for a high pressure air source.I have came across a few problems,the compressor has 4 lines coming out(pictured) of it unlike the the usual 3 which I have seen,I suspect the large one being the intake and the smaller one closest to it being the output,but what are the other two copper lines for?I am Also a little confused on the wiring part of this as It has clip on connections not wires coming out and I am not sure how to wire it up for safe use.

Here are a few specs.
1.2 amps drawn
240 volts
No earth cable/connection visable


Any help would be great.

[ralphd]

If I can see right, if the two tubes next to each other on the same plane at the bottom, they would be an oil cooler. The lines can be cut and ignored. Then the bigger of the other two would be the "air in" and the smaller is the "air out".

The round disk is the overload and your hot wire atatches to the tab. You neutral atatches to the tab that is on the relay mounted on the compressor. More than likely there should have been a capacitor. Probably 25mfd @ 370vac. If you give me the name on the compressor and the model number, I can provide you with a link that would give you all the details you need.

[rna_duelers]

Well I'll get all of those for you tomorow,As it's 11:10pm and I'm a little intoxicated.Good to see some one can help me out.

But as were the oil cooler went could I use that for an oil inlet/drain so fill it up beacuse I'm not sure if it has any oil in it and that would cause alot of damage to it.

I do know that this compressor came out of a Fisher Pykal fridge/freezer.

Could you also use positive,negative and earth a refrences and I do not understand 'neutral' and 'hot wire' terms.

Thanks you.

[sniper hero]

give some more pics I got a lot of wiring problems with mine and fixed it
(now it's down again but ok)

you might want to type in the numbers some where on the compressor and chack wether you can find a PDF with everything you need in it

[ralphd]

Well as for the oil lines - that is a closed loop inside the compressor. If you blow in one tube the air would come out the other and not the compressor lines themselves. It's to cool the inside od the compressor when it had refrigerant. The hot wire is a term for a wire that has voltage on it. The neutral wire is a wire that is hooked up to ground and to the power lines outside. If you were to check the voltage between the two hot lines you would get 240 volts but if you were to check between any of the two hots to neutral you would get half the voltage or 120 volts. Al least thats the way it is in the states. I think your outlets in the home are 240, right? Well I just realized you said the compressor is 240 so the other wire is a hot as well.

[POLAND_SPUD]

@ raplph.. I think that in the US it is 115V not 230V

[ralphd]

rna_duelers is in Australia not the USA. That's what I meant.

[rna_duelers]

I would add more to this topic about the compressor for help,but I'm heading off to the hospital for a while.

[ralphd]

Well, take care. Bring a notepad and keep the ideas flowing.....

[Carlman]

I would add more to this topic about the compressor for help,but I'm heading off to the hospital for a while.

ya doin wha now?

what happened

[rna_duelers]

I had really bad abdominal pains,all is good now though I just have to go lighter on my drinking.

Ok Here are the specs for it which are on 3 stickers on it.

Sticker On Side Reads:
Model DB91C19RAY5
230-240v 50Hz AC ONLY 1PH
FULL LOAD 1.2A CF3 CH2 F
Matsushi Electric Made In Singapore
CS7187N

Sticker On Top:
Tray: 790 Relay: 209988
COMP: 209493 Supply: 873354
O/Load: 209084 Power SW: 880815
Part: 11622 S.No: NSC712075

Smaller Sticker On Side:
SXH3409750

Stamped Digits On Compressor:
DB91C19RAY58DO96

That's all of the info thats on the compressor,hope it gives you the info you need.

[ralphd]

Wow, this was a tough one. I finally was able to find a PDF of a fridge that used that compressor. Go through it to locate the page with the wiring diagrams which uses your particular compressor. I think it was page 10 or so. There are also specs about that compressor so you can identify the windings which is very important. Good luck.

http://weixiuzhijia.vicp.net/UploadFile ... 440042.pdf