Oil change needed when repairing a leaky unit?

[Xeon th MG Pony]

Ya a few techs and I got into wondering if methyle hydrate would work, it would chemicaly dehydrate the thing, but our biggest concern is the windings!

Hey there ya go walt, you can contribute by doing a small experiment!

Get an old compressor take a megger reading, and then flush it with methyle hydrate, dry it off and see how much it effected the insulation! that would realy help allot here!

[one_servant]

Okay guys...here's a learning/teaching moment. Could someone please break down the "oil change" process for a simple Danfoss compressor? A step-by-step process would be very helpful for me to understand how this all works. If someone has the time I thank you kindly.

[Xeon th MG Pony]

Same oil as that whent out, or to a new different oil, this will effect the procedure.

[[XC] 2long4u]

Disconnect the compressor, turn it on its side and drain the oil out one of the ports. Then put the same amount of oil in that came out. Simple huh. Its easier with o-rings ( you just unbolt it).

[one_servant]

wow, that is simple. Thanks guys. Easy enough.

[Xeon th MG Pony]

Thats only when replacing the oil with the same, and No you don't turn it on, other wise you'll no longer HAVE a compressor!

[wdrzal]

Depends on the compressor. Rule is, what comes out, goes back in. Unless you do a proper flush with acetone or alcohol then bake out the moisture once that all evaporates. Then add what the manufacture recommends minus a little bit since our systems have too much oil as it is.

Bake out the moisture??????

I thought thats why we used vacuums pumps all my life we boil the water/moisture off but @ ambient temperature.

Just curious,do you put the compressors in the oven??????

[Xeon th MG Pony]

Actually in an Article from a compressor manufacturer stated to dehydrate a badly contaminated system to hold it at 140C while flowing nitrogen through it while at vacuum.

[wdrzal]

Okay guys...here's a learning/teaching moment. Could someone please break down the "oil change" process for a simple Danfoss compressor? A step-by-step process would be very helpful for me to understand how this all works. If someone has the time I thank you kindly.

Please go read DetroitAC's sig and if you don't get it reverse it

[wdrzal]

the 140F I'll buy.not 140 C . As I've been telling you guys to use a heat gun or hair dryer for years.It help break the surface tension and release moisture clinging to the tube walls . never never use a torch for a heat gun.

purge with dry nitrogen and vacuum in cycles.

pretty hard to hold a low enough vacuum to dehydrate while adding a gas thus pressure.

[Xeon th MG Pony]

I'll try and find the article.

It was 140C, the N2 was put in via needle valve.

It is very easy to hold a vacuum while adding gasses, just learn a bit about N2 Lasers and CO2 open loop lasers.