airflow into condensing coil

[nina]

am looking at a recent installation (this time it's a job) on a Trane package where the return connects to a 2ft flex and due to the location on the side of the unit, the condensing coil collects dirt only on that side, with the rest of the coil staying relatively spotless. since there is no option for the location of the connection (it's only on the right side or on bottom of unit), am asking if there is some possibility to install an adapter that would "fan out" the oval shape to cause the incoming airflow to spread move evenly over the coil? (rough picture below, spots depict the location of the coil that collects dirt)

[samit55]

Any HVAC company should be able to make a transition for that.

[nina]

ok, yes, I'm the hvac installer/tech. Was just wondering what the part might look like or if I need to custom build it.

[jacob perkins]

nia,nina,nina...

you mean evapotater coil?
you can remove the flex from the plenum--cut flat metal that fits on the box-- cut a 24 inch circle in that piece of metal--screw that piece over where you want it--trim some of the oval--put your flex on the 24 in. circle.

or you can just cover the the oval and cut a new 24,if there is room for that

less than an hour



best thing to do is stop the source of dirt

[jacob perkins]

never mind. it's a package unit not a split.

what's in the way ?
knock out the bricks or cut the wood.

[jacob perkins]

that would "fan out" the oval shape to cause the incoming airflow to spread move evenly over the coil? (rough picture below, spots depict the location of the coil that collects dirt)

woulnt worry about it.
where the dirt collects might not be an indication of the coil surface being starved for air(besides the parts covered with dirt.)
If you suspect insufficient return air,then by all means correct the problem


On the other hand, look at the bright side... if the dirt is collecting in a small area, that's better than it covering the whole coil ....and easier to clean