Hi, Gents,
I've seen some rusts (surface rust, not too bad yet) inside the burner box and water drip marks on the box cover. The moisture/water has to come from the intake pipe. Both intake and exhaust pipes are sloped toward furnace as per instruction. There is a drain on the bottom of the inducer motor which takes care of the exhaust pipe condensate flowing back, but there is none on the intake pipe. The intake pipe comes in to furnace from top, parallel to exhaust pipe. I don't believe this is a constant problem, but want to see what you would recommend for a good solution. I found this video (here) on youtube on a Carrier unit, and the tech installed a trap on the intake pipe. Unfortunately, this is a special-size tee and trap, and I can't use it on my setup, which is 3in PVC.
My initial thought is to get a 3x3x3 tee and add that on the horizontal pipe just before the drop to furnace. Since it's not a constant problem, I won't bother with a drain line. Just thinking that I can get a 3 to 1.5 reducer to attach to the tee, and on the 1.5in end, I can cap it with a rubber end cap, which I can remove and drain water if needed. I suspect the moisture (condensate) might be worst in summer where hot moist air comes in contact with cool pipe in the basement, and obviously the furnace is not in use. What do you think?
Furnace is a Trane XV95, upflow, in basement.
Thanks.
I've seen some rusts (surface rust, not too bad yet) inside the burner box and water drip marks on the box cover. The moisture/water has to come from the intake pipe. Both intake and exhaust pipes are sloped toward furnace as per instruction. There is a drain on the bottom of the inducer motor which takes care of the exhaust pipe condensate flowing back, but there is none on the intake pipe. The intake pipe comes in to furnace from top, parallel to exhaust pipe. I don't believe this is a constant problem, but want to see what you would recommend for a good solution. I found this video (here) on youtube on a Carrier unit, and the tech installed a trap on the intake pipe. Unfortunately, this is a special-size tee and trap, and I can't use it on my setup, which is 3in PVC.
My initial thought is to get a 3x3x3 tee and add that on the horizontal pipe just before the drop to furnace. Since it's not a constant problem, I won't bother with a drain line. Just thinking that I can get a 3 to 1.5 reducer to attach to the tee, and on the 1.5in end, I can cap it with a rubber end cap, which I can remove and drain water if needed. I suspect the moisture (condensate) might be worst in summer where hot moist air comes in contact with cool pipe in the basement, and obviously the furnace is not in use. What do you think?
Furnace is a Trane XV95, upflow, in basement.
Thanks.
source https://hvac-talk.com/vbb/showthread.php?2223529-what-is-a-good-solution-to-stop-moisture-coming-in-from-intake-pipe-(Trane-XV95)&goto=newpost
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