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Old 04-20-2019, 07:55 PM   #1
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Installing new A/C ????

I am installing a new Dometic A/C in the bedroom of my 3600 and the instructions say to torque the 4 bolts to 40 to 50 "INCH" lbs. Can that be right? I could probably tighten to that with my fingers. I would think at least snug up to leveling blocks. Any help would be greatly appreciated.
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Old 04-20-2019, 07:58 PM   #2
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I am installing a new Dometic A/C in the bedroom of my 3600 and the instructions say to torque the 4 bolts to 40 to 50 "INCH" lbs. Can that be right? I could probably tighten to that with my fingers. I would think at least snug up to leveling blocks. Any help would be greatly appreciated.
with those little bolts, inch pounds would be right.
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Old 04-20-2019, 08:24 PM   #3
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Thanks, I just went out and torqued them to 40 inch lbs and it's plenty tight. It takes a lot to get to 40 inch lbs . I was very surprised. I guess the foam gasket has to do with it.
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Old 04-20-2019, 08:24 PM   #4
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45 inch pounds is almost 4 foot pounds. The 1/4" bolts will handle that and pull the A/C down on the gasket adequately.


I didn't have any torque specs when I tightened mine with the 1/4" impact wrench and the little bolts didn't break.
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Old 04-20-2019, 08:27 PM   #5
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Thanks sundancer. We must have been typing at the same time.
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Old 04-28-2019, 01:49 AM   #6
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How was the install? I’m getting ready to install one in our garage on our new Endurance.
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Old 04-28-2019, 09:52 AM   #7
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Very easy. I was lucky enough to have access to a friends shop and forklift. Mine was just a replacement and all the wiring was there. Hopefully you have a fan vent in your garage so the 14x14 hole is already there. Mine did when we had the A/C installed in our garage. We had it wired to a separate 30amp plug so we use both the 50 amp and 30 amp at the campground. That way it works independently from the other 2. The way it was explained to us if we would have wired it in with the other 2 then all 3 compressors could not run at the same time they would have to kinda take turns or something weird like that.
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Old 04-28-2019, 03:15 PM   #8
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Very easy. I was lucky enough to have access to a friends shop and forklift. Mine was just a replacement and all the wiring was there. Hopefully you have a fan vent in your garage so the 14x14 hole is already there. Mine did when we had the A/C installed in our garage. We had it wired to a separate 30amp plug so we use both the 50 amp and 30 amp at the campground. That way it works independently from the other 2. The way it was explained to us if we would have wired it in with the other 2 then all 3 compressors could not run at the same time they would have to kinda take turns or something weird like that.



That is the most difficult part of the entire job, getting the unit on the roof. I am still contemplating on whether or not to replace my current Advent 13.5 with a Dometic 15K that is lower in height. I store my trailer in our barn that is 11' to the truss, and I have to remove the cover off the AC unit to get it in. With the shorter units I would not have to do that.



The other reason is for better cooling, but I found in taking the inside cover off, that the ducts are partially blocked by the foam used in the plenum. So I will trim those first and see if it cools better.
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Old 05-01-2019, 10:11 PM   #9
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On Harley-Davidson floorboards, I used to think about 100 ft-lbs was the right torque to keep the danged things from rattling all the time. Fortunately I carried extra of the shouldered bolt for them. Cuz I snapped off more than one or two...

For small fasteners on bikes, UTVs an RVs I've purchased a MAC tool 1/4" drive torque wrench that reads in in-lbs. Very handy!

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