problems with a yorkie

5 ton commercial package unit, my guy went there and the compressor was making one hell
of a racket
rated 19 amps drawing 45 then off on internal
he went to install the new comp today I told him to blow the system with nitro
he said lots of oil came out
uh oh
he installs and the unit runs fine for 20 minutes then goes off on high head
700 psi
so I told him its either
a) you did not get all the oil out and only half the coil is feeding
which means a restriction in the first place
or
b) the txv is bad or clogged
or c) the filter dryer is clogged
he starts the unit back up and it runs fine
125 and 340 psi
so I told him that a txv is either good or bad, not intermittant
cut the filter dryer out and put straight pipe in
start it and tell me whats going on
he is doing that now but I wanted y'alls opinions

Restriction.

me too but does not sound like the txv
thats why I told him to cut the dryer out

But what if there is moisture in the system and it froze the txv?? I've seen it before.

TXV's can be kind of bad, one time I had one that was doing what his is, finally changed the TXV, as I too believed what you do, there was a burr on one of the push rods in the txv and it would hang up on it every once in a while

he cut the dryer out and oil ran everywhere
unit is running now so I told him to sit pat for awhile and monitor

that is usually on rack systems
besides he vacuumed good after installing the new comp
you cant vacuum a rack system you have to purge them

what purge them!!!! That's against the EPA rules I would never do that.

ooops
my bad LOL

this is in Miami
those ricans do things different no matter what I tell them
good news is the unit has been running fine so I have him going back tomorrow to check
then going back Monday to replace the dryer

Why on earth would you replace a compressor and not the drier, that's just plain stupid.

I didnt
I was called after the fact and had to figure it out from there

I know you didn't, I'm just wondering what kind of moron would do such a thing.

when I replace a comp I not only replace the dryer but also the contactor

believe it or not he is one of my best employees and has been with me for 9 years
he lives in Miami and keeps me from having to go down there
but now you know why i am the service manager and he is an employee

Only a few where I left the contactor. If it's a 70 amp and looks good I leave it but, usually, it gets a new one.

Save 15 minutes not changing the drier, waste 2 hours changing it anyway.

Sounds like the condenser was full of oil to me. A bad txv would make the suction pressure low, but would it make the head pressure that high? If you close the liquid service valve to pump down a split system the head pressure does not get real high. Maybe it would if you left it running.