i have a spilt system.The serial number on this unit is#T M0693 2679.I would like to know what kind of unit is this and if I can get a manuel or just a new unit.Its working but its been in the house since 1994.The unit was pur in wrong.They have in the one room which is the kicthen and dining room,two air ducts which blows cold air.Then underneath the airduct is the return air to the unit and above this is the termostat.I would be glad to send pictures if you wish so I can find out just what is going on the right way for a spilt system.Just send me a return email address and I an get those sent out ot you .Thank you for your time Russ.(rustyalaskan@yahoo.com) Ps I just moved down to port isabel,texas on the coast.Thanks again!