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Questions About Internal AC Coils
I have a Conquest 90 Max gas furnace with central air.
I also have a bunch of questions: 1 - The internal coils have not been clean since it was installed 5 years ago, so I decided to take a look and see if they needed cleaning. Problem is, I'm not sure how to access them. I removed the screws from the panel where the condensate and refrigerant pipes are, but as you can see from this picture, I can't remove the panel because of the vent pipe. http://imageshack.us/photo/my-images/62/furnacef.jpg/ If I could tilt the top or bottom of the panel outwards, I could remove it, but the vent pipe prevents any significant tilting. There is no other panel that I can remove. The other 3 sides that surround the coils are a single piece which has the duct work on top of it. The duct work would have to go up in order for the 3-sided surround to come off. How do I get to the coils? 2 - Through the limited opening, I can see into the coil area with a flashlight. I see 2 tee-pee sets of coils and as far as I can tell they are perfectly clean, at least on the surfaces that I can see with the panel open as shown. Should I just close it up and forget about it or are there areas I should check - assuming I can gain better access? 3 - When I removed the panel I saw 2 stickers, both of which raised questions in my mind: 3.1 - One sticker has a picture of a "condensate drain trap" made from a piece of flexible tubing attached to the drain output pipe. As you can see from the picture, I don't have a trap. At the bottom of the PVC pipe seen behind the gas line is the condensate pump. The pump sends the condensate up a flexible tube and across the ceiling to the utility sink. I don't need a trap with that set up, do I? 3.2 - The other sticker says: "Coil is shipped with a low pressure (5 -10 psi) charge of dry nitrogen. Evacuate system before charging with refrigerant." Would the unit work (i.e. cool) if the system was not evacuated/ charged when it was installed? I'm not saying that it wasn't evacuated/charged because I don't remember if the installer did it or not, so I'm just curious. Thanks! |
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