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Old 10-11-2016, 11:11 AM   #1
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2016 Greyhawk 29MV very hot this summer

After spending this past summer on the east coast with the temperatures in the 90's most of the time, I've decided to put another roof top A/C unit in my 2016 Greyhawk 29MV.

There where many days we could not keep the coach below 85 degrees. In the shade the A/C unit would keep up. In the sun, it just wouldn't do the job.

FYI: We also sealed off the driving portion of our coach, used insulating foil in the windows, had a fan running and more. Just too hot to do that again.

My plan now is to replace my Fantastic Fan in the bedroom with a second Coleman/Mach 13,500 BTU A/C unit.

I am going to run a dedicated circuit to that A/C unit with a breaker and pull the power from the 50 Amp circuit at the RV park pedestal.

Does anyone know how to or has anyone run wiring from the ceiling area in the bedroom down to an accessible place I.E. under the bed or ???

I have not checked with Jayco tech support yet. Thought I would check here first.

Any guidance here is appreciated.

Thanks,
Tom
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Old 10-11-2016, 12:30 PM   #2
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I added a second AC to my old Itasca. I used Wire Mold to get the wire to a cabinet where I could then route wiring where it needed to go. Let me know how the install goes. I'm thinking of doing the same on my Greyhawk 31FS. Keep in mind the second AC won't work in 30 Amp parks or with the generator.

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Old 10-11-2016, 02:59 PM   #3
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thank you for your input.

I'll keep you informed.
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Old 10-11-2016, 10:28 PM   #4
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Won't that be a bit noisy in the bedroom when you try to sleep?
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Old 10-12-2016, 08:16 AM   #5
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It's been my experience that once the sun is off the motor home, the existing AC will cool the rig down with no issues. So when sleeping at night, you won't need the added AC over the bed. That being said, the noise wouldn't bother me anyway. I sleep with a fan often here in California and the noise would be similar.

Also, I found that Coleman has started making a 9200 BTU AC. It's max starting watts are 1,500 while the existing 15000 BTU AC draws 1,960 watts max while starting. At 3,460 Watts, the generator or 30 Amp shore power would just make it if I weren't using much else. Something to consider...

White Coleman 9,200 BTU Mach 8 Polar Cub RV Air Conditioner | RV Parts Country
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Old 10-12-2016, 09:30 AM   #6
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We are in the same boat with our new Redhawk. One AC in the Texas summer isn't going to work. I'm planning on adding a 2nd unit in the spring. I removed the interior trim around the bedroom vent and found that there is a small gap in the insulation that will allow me to run the power straight back to the back wall, through the cabinet and down into the rear cargo area. Unless I'm missing something it "looks" like it won't be too difficult to get the wire there. The hard part is getting the new AC up on the roof without damaging the RV or AC.

I saw that new Coleman AC and thought it might just work on 30 amp but we rarely have issues finding 50 amp service so I'll probably go with a larger AC.
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Old 10-12-2016, 09:53 AM   #7
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Great info on the gap in the ceiling! Thanks for the intel.

James
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Old 10-12-2016, 09:59 AM   #8
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thank you, I will check that. very helpful.
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Old 10-12-2016, 10:00 AM   #9
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thank you, i will look into that unit.
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Old 10-12-2016, 10:25 AM   #10
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Giving this some thought, since I am running a dedicated line to power the second unit not using the existing motor home electric circuitry, I was not planning on nor do I know how to incorporate the generator into that second circuit.

I'm sure there is a way, just have not considered it yet.
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