whats inside (freon)?

[primmers]

i got a customer who had a compressor installed by another guy when i couldnt get there..its a 5hp copeland (MRA2-050A-TFC), anyway the saftey on the reciever let freon out, i replaced the thing, and restarted it, i looked at the TXV and its a R-12...but i have high head psi and low low side, but its running on the t-stat....i dont know what the guy put in it cause he was big on that hotshot stuff....anyway, im wanting to change the filter and put in 401A.

my question is how do u know whats inside and coldnt the expansion valve screw up any guage reading?

[VTP99]

Is not all the refrigerant out of it ?

[primmers]

nope...it lost alot though....when i opened the service valves it started back up, im gona guess the room was about 50 degrees and the low side read 12/15 psi, and the high side around 200+..

i just phoned my customer and told him what id like to do...he'll go for it, but my original question is what bothers me..not knowing what my competitor put in it 6 years ago...my customer will try to find the invoice...

the high side dual psi safety is set to 400 psi........weird.

[VTP99]

Is it for low or med temp app ?

[primmers]

it coOls dead animals..medium..

[Phase Loss]

You can only make an educated guess as to whats in there.

You're doing the right thing by pulling it out and putting in a known refrigerant.

[DLZ Dan]

You can only make an educated guess as to whats in there.

You're doing the right thing by pulling it out and putting in a known refrigerant.

I second that! I use Hot Shot if i see an R-12 TXV. It's a shame now that a tank of it is a small mortgage.

[primmers]

I second that! I use Hot Shot if i see an R-12 TXV. It's a shame now that a tank of it is a small mortgage.

i paid $300 for my last bottle of r-12....my supplier said r22 is $422 a bottle if i buy 10 bottles..

thanks guys..

[VTP99]

I think your going to find that R401a (mp39) is much more then R414b (Hot Shot) Although I do like mp39 for w/i apps.

[primmers]

ive used 401a everywhere, dont wanta change now..

[controldude]

This is a rant rather than a solution but I think r-11, 12, 22, 500, 502 are stll the best refrigerants out there.

[primmers]

yep i agree controldude....

[craig1]

ive used 401a everywhere, dont wanta change now..

then don't change

The worst thing you can do is have different refrigerants at each site. Then you have to carry a whole bunch of bottles around.

I use Hot Shot simply because thats the first r-12 substitute I ever used and never had any problems to justify trying anything else.