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.
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.