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Old 04-21-2010, 09:00 AM   #1
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AC insulation

Took apart the cover to the 32yo Armstrong AC. There was 1/4" fiberglass insulation glued to the inside of the cover. The insulation held water and this allowed rust to form on the galvanized metal. Scraped and painted the metal. Where can I find 1/4" sheets of insulation? Found 1/8" foil backed insulation at HD. Can this be used instead? And as an added surprise, found out there is a heat strip coil! Thanks. Jack
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Old 04-21-2010, 04:21 PM   #2
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be careful with the cover, if it is anything like mine, not fiberglass but plastic and breaks with any pressure, also A/c people thought 4 well placed screws were enough to hold it in place. I managed to put 4 more in as two of the screw holes had cracked and probably would have let loose with an 18 wheeler passing. Always wondered why I saw a lot broken covers on the side of the road. ;-(
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Old 04-22-2010, 06:27 AM   #3
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The shroud is another project. Mine was vulkemed all around the bottom to the roof of the AS. It has three cracks and many more along the bottom edge. Plan to use pieces of aluminum 1/2" flat bar to beef it up. A new shroud is around $250! I am working on the inside cover of the AC itself. Found a roll of foil backed insulation. May have to use two thicknesses. Jack
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Old 04-22-2010, 12:24 PM   #4
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Insulation?

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Originally Posted by Skamper1 View Post
The shroud is another project. Mine was vulkemed all around the bottom to the roof of the AS. It has three cracks and many more along the bottom edge. Plan to use pieces of aluminum 1/2" flat bar to beef it up. A new shroud is around $250! I am working on the inside cover of the AC itself. Found a roll of foil backed insulation. May have to use two thicknesses. Jack
I am trying to figure out why there is insulation on the inside of the cover.
Is it just to protect the plastic cover?

Ken
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Old 04-23-2010, 06:31 AM   #5
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This is the housing/chamber after the compressor. There is a heat strip there and I assume an evaporator. Not my area of expertise, so may have to ask others. Maybe it is there to help heat the "winter" air? Just know I am scraping all visible rust and giving it a paint job before resealing the AC. Managed to take apart shroud. Getting good at removing rivets. Now if I can get good at reinstalling them! Jack
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