HVAC Condensate drain questions

[T_J_L]

I replaced my furnace last year and since I didn't have central air I ordered an encased A coil to go with it. It is a downflow furnace on a concrete slab. I just recently bought the condenser and lineset to complete the system. My question is the condensate lines for the indoor A coil. The drains are right above the floor and I have nowhere to send the condensate but outdoors using a condensate pump. My problem is that the drains coming out of the A coil are lower than the input of the pump tank. I'm beginning to think there should have been some kind of base that the A coil sat first instead of the concrete floor. Anyone have any suggestions for what I could do? I appreciate any help!!

Todd

 

[brewchief]

I normally build a 6 or 8 inch tall sheetmetal base to set the coil on, if there's space to raise everything up it's likely the best way to fix the issue.

A condensate pump designed for mini splits will have a little reservoir and a separate pump, the switch in the reservoir triggers the pump that can be mounted higher then the reservoir and it ***** the water out. Those pumps are more expensive but might be an answer. A quick search shows a little giant EC-400 being a possible candidate.

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[T_J_L]

Thanks Brewchief, I think that just might work for me! I need to pump the condensation up the wall into the attic and then back down on the opposite side of the room to the washer drain since there is no floor drain. In your opinion do you think this pump is capable of that? I'm not well versed in reading the charts. It says it pumps water to 29.5 ft so I'd assume an 8ft high run won't be an issue. Thanks again.

 

[Bert_]

How does it pull return air if the coil is sitting on the floor?

 

[brewchief]

How does it pull return air if the coil is sitting on the floor?

Sounds like a downflow so return would be at the top, supply duct is probably inground under the slab, common in some areas. It's often spiral duct with a plastic coating (at least on the newer stuff). It's kinda a pain to lay out, trench, get set in the trench and sealed and have the registers land exactly where you want them. Probably the reason that most houses without basements end up with a bunch of flex in the attic.



As far as that pump working it should have plenty of lift, I don't know 100% if it can move enough water, a call to the manufacturer might be in order.

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[nadogail]

Improperly drained A coils can be a real problem. My HVAC contractor had to patch and paint my ceiling twice before they got it right.

We are very pleased with the work they did and had them do my son's house too.

 

[LS6 Tommy]

Improperly drained A coils can be a real problem. My HVAC contractor had to patch and paint my ceiling twice before they got it right.

We are very pleased with the work they did and had them do my son's house too.

Unit leaked twice? Whether they fixed it or not is irrelevant. They should have known that emergency pans are required by code when the unit is above living space.

Tommy

 

[nsula_country]

2x on short plenum to space cased coil and furnace up if possible.

CT