hmm - true these same idiots wash the condenser fins with soda ash and then wonder why the thing is oxidised to hell, well screw them and get a vacuum pump yourself, an old rotary freezer compressor also works, tell the stupid "comny ka installar" not to open the block valves unless you say so, get him to put the vacuum pump on the test port with his gauge set. If they dont want to do this, kick him out of the house then get another installer, you are in charge, its your AC, your house and your money.
hehe - true.. dimaagh completely farigh hojayega I think.
Improvise and adapt to the suggestion. Aqalmand ko ishara hi kaafi hai.
Whenever you install the outer unit make sure that the unit has enough room to circulate air and there is room infront and above the unit as hot air rises. My relative (khala) in Karachi had a genius install her 8 outer units side by side at a distance of 10 inches apart inside a balcony type eavestrough thing - Those had a really hard time controlling pressure spikes and temperature. Had to redo all the systems with fresh refrigerant and additional dryers because the old one was adulterated with air by not pulling a vacuum in the linesets. The outcome was very good.