404a high pressure?

[Gary]

i dont think there is any sort of speed control on the cond fan,, what i think it is,, is when i put this 404a cond unit in,, it was bigger than the coil and comp i pulled out,, so i had to cut out the drywall on the left,, and the plaster and lathe in the back. so in the back of the unit is the bare brick from the outside of the building.

You might try to insulate the brick... even a thin layer of plastic would be better than nothing.