-19c "sawks"?
That isn't bad considering the system was most likely dirt cheap.
Just becuase it is designed for one thing doesn't mean it won't do the other without breaking.It hasn't broke yet has it?A problem would be liquid slugging, but you can prevent that easily enough by heating the suction line.
Now if you wan't to do something as simple as adding a bullet valve and letting a little bit of refrigerant out, it would have got maybe -35c to -40c and it wouldn't have any liquid slugging problems either.
Joe changed my title because I disagreed with Brian when he replied to hydrogen18.
It looked like he was giving him a hard time, but he wasn't.
Just trying to get him to read up about phase change before plunging into it.