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Is my unit installed correctly?

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igoodable

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Discussion starter · #1 ·
couple of questions:
1. Is my drain pipe installed correctly? I did a bit of research and it looks like it's missing a P-trap. The main drains to my bathroom sink and it makes a popping noise when the AC kicks on. There are air flowing out of the tube when the AC is on.

2. Is condensation around the Freon line normal? I had a leak and the AC guy came and tighten it. All he did was tighten that bolt and added Freon or whatever it uses. AC is working fine...it's about a month since the AC guy tighten the bolt.

I'll call the AC guy to come back, but I want to get some input before I waste some money.

Thanks!!!
 
#2 ·
Is this an AHU or a furnace + coil?

Both drain lines should be trapped even if the secondary dumps into the emergency pan. There should be no opening between the coil and the trap like you have now.

The purpose of the trap is to provide a water seal that prevents negative pressure in the drain line which is created when the coil is on the suction side of the blower.
 
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Discussion starter · #3 ·
bobboan said:
Is this an AHU or a furnace + coil?

Both drain lines should be trapped even if the secondary dumps into the emergency pan. There should be no opening between the coil and the trap like you have now.

The purpose of the trap is to provide a water seal that prevents negative pressure in the drain line which is created when the coil is on the suction side of the blower.
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Thank you, I'll have an AC tech out to repair it.
 
#4 ·
Do you live in a cold climate and the Air Handler installed in a attic, if so IMO I would have them install the the P trap part inside the auxiliary/emergency drain pan. As if the residue condensate does not evaporate ( end of cooling season ) in the trap there may be a chance the water in the trap may freeze and develope a hairline crack. Then summertime comes potential for drippage onto whatever is located under AH.

Do you have any problems with loosing some of the refrigerant? Just asking....as downstream of the metering device ( 2nd photo where it's butted next to the AH ) there is a nut with oil residue on it, certainly that could be from when they lubed up the threads initially and that it's residual oil. You can compare to the other nut before the metering device ( with green paint ) to see the difference. If you get an occasional gas and go I would have them look at that nut......
 
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Discussion starter · #5 ·
Bazooka Joey said:
Do you live in a cold climate and the Air Handler installed in a attic, if so IMO I would have them install the the P trap part inside the auxiliary/emergency drain pan. As if the residue condensate does not evaporate ( end of cooling season ) in the trap there may be a chance the water in the trap may freeze and develope a hairline crack. Then summertime comes potential for drippage onto whatever is located under AH.

Do you have any problems with loosing some of the refrigerant? Just asking....as downstream of the metering device ( 2nd photo where it's butted next to the AH ) there is a nut with oil residue on it, certainly that could be from when they lubed up the threads initially and that it's residual oil. You can compare to the other nut before the metering device ( with green paint ) to see the difference. If you get an occasional gas and go I would have them look at that nut......
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No, I live in a hot and humid area (Houston/Texas). I did had problem with loosing refrigerant, all the tech did was tighten the screw. I noticed there are a lot of condensation in the area, so I'm worried that it is not fixed.
 
#6 ·
igoodable said:
No, I live in a hot and humid area (Houston/Texas). I did had problem with loosing refrigerant, all the tech did was tighten the screw. I noticed there are a lot of condensation in the area, so I'm worried that it is not fixed.
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Condensation on that nut ( after the metering device ) and slightly past it is normal.
 
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Bazooka Joe
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