I reside in a medium rise condo that utilizes a two pipe fan coil for heating and air conditioning (season dependent). This summer the humidity in the u it had been excessive, averaging around 75-80%. The temperature from the fan coil has been cool, around 20 Celsius, but the unit often feels uncomfortable due to the humidity.
I was looking in the fan coil cabinet when I noticed a few things. Firstly there's a rather large air gap between the vent part of the fan coil and the rest of the cabinet. The cabinet it self is relatively large, probably 4x5x10 feet. The fan coil looks like it takes up only part of the volume. Is that gap something that should be sealed up? It seems like the conditioning air is able to mix with unconditioned before being blown out. We've also been experiencing food smells. I assume additional insulation would help.
Additionally, the insulation looks like it's saturated with dark looking debris. Particularly above a copper pipe that appears to be "crimped". Is this normal for fancoils?
I've attached a couple photos. Any advice would be appreciated.