Single condensate drain line for a Lennox C33 cooling coil and SLP98 FAU
Condensate water cannot overflow or back up into the fau heat exchanger with this set up. Equipment is set in fau closet with a raised platform for return air. Home has very nice hardwood flooring all around this interior fau closet. With this mechanical switch I don't anticipate water damage from this installation. Without these safety switches a condensate back up on a call for cooling would fill the heat exchanger, overflow the fau vent/trap assembly and make a mess.
3/4" Cross tee allows for the installation of a safety switch to break the "Red".
Photo taken from the back of closet looking out at drain assembly and me.
Drawing of this drain set up.
Lennox SLP98 condensate trap
Am considering replacing a 14 year old Keeprite with the SLP98, updraft, side return. Have had an XC14 for the last four years, without trouble. Would be using an iComfort.
Originally Posted by Bsmith816
The owner/dealer (who only sells Lennox) who came to give a quote on the installation said he would combine the AC condensate drain with the furnace condensate drain, and run them both into the basement floor drain.
When I asked about a trap, he said he didn't use them - because they always clogged. Without a trap there would be no clogs. He has been in the business about 30 years, has done HVAC installs for a nation-wide TV renovation show, and out of the four people who came to quote, he is the one I would prefer to go with, based on his discussion of my needs. His quote was not the least expensive.
But I am puzzled over this trap question. There is now no trap on the AC coil, nor is there a secondary drain, and have had no problems. Is it OK to go with no trap on the furnace drain, too?