replacing a 30yo ac unit on the roof of an RV

Post #435,659 by boxley 8/12/20 10:12:15 PM 8/12/20 10:12:15 PM Reply	replacing a 30yo ac unit on the roof of an RV taking the old one out, I have the old install instruction set, removed inside lower unit disconnected all wires, removed all mounting bolts, damn thing wouldn't move. Checked a bunch of youtub vids, supposedly it is loose once the bolts are out. However neoprene gaskets torqued to 50ftlb after 30 years weld to the roof. Used a scraper and a hammer to loosen the gasket a little. Cut a 4x4 to an appropriate length and took a car floor jack mounted on another 4x4 to spread the pressure points, centered the upright 4x4 to the upper unit then slowly raised the jack while cutting gasket as I went. Upper unit is loose now but left in place as I foresee a major scraping job before I place the new one down. Fun part was hoisting the new unit 77lbs to the roof of the RV. Even in my 40's I would have tucked it under my arms and climbed a ladder but those days are long gone. Good thing I am crafty. "Science is the belief in the ignorance of the experts" – Richard Feynman
Post #435,660 by a6l6e6x 8/12/20 10:56:12 PM 8/12/20 10:56:12 PM Reply	Replacing with a heat pump? That's what I did, but paid to have that done. Alex "There is a cult of ignorance in the United States, and there has always been. The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that "my ignorance is just as good as your knowledge." -- Isaac Asimov
Post #435,661 by boxley 8/12/20 11:09:25 PM 8/12/20 11:09:25 PM Reply	no, a domestic brisk II mainly because it has manual controls as opposed to the the original duo therm that had a pressure digital switch. Once that went out the unit was horked. Once I get the old one down I will tear it apart to see if I can wire it to a manual system then put it in the bedroom for a second unit After I looked at the install book for the original it seemed pretty straight forward. What was your labor cost if you dont mind me asking? "Science is the belief in the ignorance of the experts" – Richard Feynman
Post #435,666 by a6l6e6x 8/13/20 1:36:11 PM 8/13/20 1:36:11 PM Reply	The price included installation, around $1700. The unit needed replacement because the first one had a flaw and did not work when it was really hot outside. The coolant was mixture of chemicals. I’m glad I didn’t mail order the unit because warranty handling would have been a real pain. Alex "There is a cult of ignorance in the United States, and there has always been. The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that "my ignorance is just as good as your knowledge." -- Isaac Asimov

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