I have an r-22 DX evaporator that a technician has determined is leaky. He said he would pull down the refrigerant into the condenser to do the evaporator changeout.
1. Is it unreasonable to expect him to flow nitrogen while brazing the connections?
2. Is it also unreasonable to expect him to use a micron gauge rather than a compound gauge to hold a 500 micron level for 15 minutes to show the system is free of contaminants and somewhat reasonably free of significant leaks?
I know it would be best if it could be left overnight, but I can't afford the cost of another service call and am willing to live with less than ideal. I also realize that if he did a pull-down on the condenser it would not show that the condenser is faiirly leak free.
Thanks for your thoughts.