Gas and Oil Home Heating Furnaces - Indoor coil (evaporator) installation

I have a rheem furnace that is installed in my attic in a horizontal position. In other words it is laying down. The air conditioning indoor coil (evaporator) is leaking at the drain fittings. I installed the evaporator with the drain pan facing the furnace outlet which means that the drain is verticle. This allows the air from the furnace to blow ACROSS the coils insted of through the coils. My question is if this is correct or do I have the evaporator installed wrong. Does the furnace blow air through the evaporator coils similar to the way a cars fan draws air through a radiator or does the furnace blow air across the coils to cool like wind blowing across a lake cools the air. Thanks for any info you have on this.

must go through the coil not over or past it

You have an A shaped coil? It sounds like you have it right. The drain pan would be at the furnace heat exchanger outlet side. It should blow the air thru, not draw it thru. There should be a second drain pan or drain pan kit for horizontal installation. Check the installation instructions to see if you have all the required parts. Sometimes it's there but you have to rearrange the components for a horizontal installation. Is this a new install and it leaked right away or has it been in for a while and is now leaking?

I would say you have it wrong, the air must flow trough the coil. If it is a a-coil typicaly the air go from the widest part of the A thru the pointed end.If its a flat coil it typicaly(but not always) is in a slant position.You should be sure no air is escaping around the coil because this would force you to undercharge the unit and loose cooling capasity. The drain pan should be in a horitontal position no matter what kind of furnace you have.Good Luck.

I ------installed the coil now water leaks out the drain pan

I ----- would say from the sound of it CALL a HVAC guy now

Tell me your not EPA and do this

:rolleyes: :rolleyes: :rolleyes: ED

The coil has a drip pan that was sosposed to be installed for a horizontal application. this seems to have taken care of the dripping problem. Thanks for the input:cool: