| [GMCnet] Rooftop AC [message #295276] |
Tue, 09 February 2016 10:24  |
Peter Garry
Messages: 138
Registered: July 2011
Karma: 0
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Senior Member |
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I removed the old AC unit that was at the rear and replaced it with a "Fantastic Fan” All’s well there. The front roof vent has also been removed (it was original with out a fan)
Now I want to install a new AC unit over the existing front vent opening. It appears that the Carrier AC unit I have sits on foam pads that surround the 14”x14” opening. I am concerned that there is no waterproof dam to keep any water out of the opening. Am I missing a component? What is the usual method of waterproofing this opening?
The foam pad in 1/2” thick by 1-1/2” wide (is quite firm) and measures 14” x 14” on the inside.
Any help would be appreciated.
Peter Garry
Calgary Alberta
’73 - 23’ (once a painted desert I think))
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| Re: [GMCnet] Rooftop AC [message #295279 is a reply to message #295276] |
Tue, 09 February 2016 11:08  |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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You can buy a new ac unit gasket which is adhesive backed on one side and
clean on the other. It should be about an inch or so thick and 1 1/2" wide.
Install and tighten down with j hooks and you are done.
Sully
77 Royale
Seattle
On Tue, Feb 9, 2016 at 8:24 AM, Peter Garry wrote:
> I removed the old AC unit that was at the rear and replaced it with a
> "Fantastic Fan” All’s well there. The front roof vent has also been
> removed (it was original with out a fan)
> Now I want to install a new AC unit over the existing front vent opening.
> It appears that the Carrier AC unit I have sits on foam pads that surround
> the 14”x14” opening. I am concerned that there is no waterproof dam to
> keep any water out of the opening. Am I missing a component? What is the
> usual method of waterproofing this opening?
> The foam pad in 1/2” thick by 1-1/2” wide (is quite firm) and measures 14”
> x 14” on the inside.
> Any help would be appreciated.
>
> Peter Garry
> Calgary Alberta
> ’73 - 23’ (once a painted desert I think))
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Rooftop AC [message #295306 is a reply to message #295276] |
Tue, 09 February 2016 18:17 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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Peter Garry wrote on Tue, 09 February 2016 11:24I removed the old AC unit that was at the rear and replaced it with a "Fantastic Fan" All's well there. The front roof vent has also been removed (it was original with out a fan)
Now I want to install a new AC unit over the existing front vent opening. It appears that the Carrier AC unit I have sits on foam pads that surround the 14"x14" opening. I am concerned that there is no waterproof dam to keep any water out of the opening. Am I missing a component? What is the usual method of waterproofing this opening?
The foam pad in 1/2" thick by 1-1/2" wide (is quite firm) and measures 14" x 14" on the inside.
Any help would be appreciated.
Peter Garry
Calgary Alberta
'73 - 23' (once a painted desert I think))
Peter,
To allay any fears you might have, that gasket does an adequate job. We have driven through rain that was heavy enough to make the front wheels loose traction. There was no water intrusion.
I was also in the interesting situation that the original Coleman unit was too tall to go into my barn, so I removed the entire A/C every fall. That went on for five years and I did not replace the gasket until I got the new one for the low profile Carrier.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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