The General Contractor of the entire Hotel Reno... supplied the Equipment, The blue prints had all Lennox equipment spec'd they just had our team put it all together. I talked until I was blue in the face to the GC about me installing LL driers. He insisted that the ones that are internal to the unit (LL Filter) was all that was spec'd and they didn't want them on.
I had the Vac Pumps on them Overnight, and down to 50 microns when all was said and done. Besides, I'll get the service work.
Hey, but get this... After I got all the A/C stuff done, we had to wait for the Gas Fitters to complete their job, and I was the one who was to commission all the gas fired appliances, three furns, Eng A RTU, and four Carrier Package units. They were to leave the gas off. I had some time and went on a 2 week holiday.
I went back to finish our part, and saw the gas was on, the furnaces and package units were running, Eng A hadn't started - they had NO REGULATORS on line... 7 psi to every valve. What a nightmare! Although I checked out the valves after they sorted the Dog-and-Pony-Show out. They seemed fine, but I still recommended they change them out. They haven't yet.