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Old 10-12-2016, 09:33 AM   #11
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Originally Posted by tomknepper View Post
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.
If you were to tie it into the power center you'd be able to power it from the shore or genset since the auto switch would toggle where you get power from. I'm not sure there is room in mine to run a second circuit but like you I wasn't thinking it was an option.
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Old 12-17-2016, 10:45 AM   #12
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I have installed the Coleman Mach 13,500 BTU rooftop A/C unit. I did see the opening in the Styrofoam you mentioned earlier. I didn't use that however.

What I ended up doing was boring a hole into the Styrofoam using a heated 1/2 copper plumbing pipe. It went thru the foam like butter.

I ran a 10 gauge dedicated line thru the bored hole into the cabinet behind the bedroom TV, down behind the cabinets, thru the floor, over to the motor home electric hatch.

I protected it with a slow blow 20 amp fuse in a fuse holder.

I have purchased a 50 Amp to 30amp, 15/20 amp Y adapter to plug into the 50 Amp receptacle at the RV park pedestal.

If I am at a 30 amp pedestal then I won't use the adapter. Just plug direct into the 30 and the 15/20 amp receptacles respectively.

I have tried it here at home and so far so good. The acid test will be at the RV parks in the summer when 95 degrees or so. Have to wait for the season.

Wanted to thank you for your input as it helped guide me as to where and how to power the roof top unit.
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Old 12-17-2016, 07:04 PM   #13
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That's awesome Tom! Any pics?

James
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Old 12-18-2016, 02:27 PM   #14
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I thought of that after I was finished. Not used to doing that when I work on things.

Sorry.

I am happy to explain to anyone who is interested.
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Old 12-18-2016, 02:40 PM   #15
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Hey no worries, I do the same thing. Maybe some pics of the finished install would be cool to see too.
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Old 12-18-2016, 06:50 PM   #16
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Originally Posted by tomknepper View Post
I have installed the Coleman Mach 13,500 BTU rooftop A/C unit. I did see the opening in the Styrofoam you mentioned earlier. I didn't use that however.

What I ended up doing was boring a hole into the Styrofoam using a heated 1/2 copper plumbing pipe. It went thru the foam like butter.

I ran a 10 gauge dedicated line thru the bored hole into the cabinet behind the bedroom TV, down behind the cabinets, thru the floor, over to the motor home electric hatch.

I protected it with a slow blow 20 amp fuse in a fuse holder.

I have purchased a 50 Amp to 30amp, 15/20 amp Y adapter to plug into the 50 Amp receptacle at the RV park pedestal.

If I am at a 30 amp pedestal then I won't use the adapter. Just plug direct into the 30 and the 15/20 amp receptacles respectively.

I have tried it here at home and so far so good. The acid test will be at the RV parks in the summer when 95 degrees or so. Have to wait for the season.

Wanted to thank you for your input as it helped guide me as to where and how to power the roof top unit.
Thank you for the follow up. I'm oping to tackle mine in the spring. Do you have any tips for getting the old vent cover & sealant out and prepping that area? Did you do much to seal the hole around the vent other than the AC foam mount?
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Old 12-19-2016, 09:09 AM   #17
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OK, I will put together some pics of the finished product. Not sure how to upload pics to the forum however. Any guidance there is appreciated. I do see the icon above for loading pics but it asks for the URL for the pic. Not sure if I understand how to get a pic from my i phone using a URL address.
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Old 12-19-2016, 09:16 AM   #18
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OK, I will put together some pics of the finished product. Not sure how to upload pics to the forum however. Any guidance there is appreciated. I do see the icon above for loading pics but it asks for the URL for the pic. Not sure if I understand how to get a pic from my i phone using a URL address.
Typically you first upload the photos to something like Photobucket, Imgur, Google Photos.

But this forum has an ability to upload pictures directly. Go down to "manage attachments" click that and see if you can upload from there.

If all fails, and you're comfortable emailing them off to me, I'd be happy to upload them for you too.

patrick
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Old 12-19-2016, 09:20 AM   #19
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I only used the foam gasket mount that came with the new unit to seal it. They do tell you how to tighten it using tabs for the correct tension on the gasket. I have since washed the roof and had a pretty good driving rain storm with no leaks.

I will send you a picture of the tool I used to both cut a hole in the ceiling behind the bedroom TV cabinet to get the power wire from the AC unit down behind the bedroom drawers and to remove 99% of the sealant from the original fantastic vent opening. The tool worked very well. Inexpensive at Harbor Freight.
After removing the screws for the vent and prying up the vent (sealant does a good job of sticking it to the roof) I used the tool to remove the majority of the sealant and then paint thinner to wipe off and clean the rest of the sealant.
That was it. 1 to 1 1/2 hours total to remove the vent and clean the opening.
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Old 12-19-2016, 09:38 AM   #20
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private message sent if you need assistance w/ photo uploading
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