A rooftop unit is more than just a magic gray "cooling box" sitting on top of a building... it is a furnace, air conditioner, and free cooling economizer all in one. Well... maybe that does make it magical...
were you concerned with that condensate line discharging so close to the unit? Do you think it should be extended further away? im in florida not sure where this was
@@TECTubefilms you are right that its fine. i was more thinking about the roof. constant dripping from the line could deteriorate the roof faster, but really, i would never write that up as a problem. Sure extending it to discharge off the roof would be better but its not gonna make much difference if i had to guess. i havent inspected too many rooftop units so i was wondering what you thought. You are obviously very professional and i like to learn from the best
@@watchmenpropertyinspection3469 Thanks for the compliment. And we do understand your point. In our cold climate, the bigger issue might be long condensate lines that are not well slopped, allow water to collect, and then potentially freeze.
Having 2 compressors does not automatically mean two condenser coils. You can have multiple compressors (or a single compressor with 2 stages) on the same refrigeration circuit. However, once you have two TXVs, then there are likely going to be two independent circuits, and hence two evaporator coils and two condenser coils.
Ok I just added a short video on my site. It has visual of how all the drain lines tie together. I will get more video Thursday and put that up as well. “ACtech formally yo mama”. Let me know if you see it.
I know. You should see the slime on the sidewalk from the roof drains. When I first got to this job I thought the AC was draining on them but it’s condensation from the roof. Yes the roof gets wet from humidity every night. The white roofs are brutal. They reflect heat very well and cook you while you’re on them.
We wonder why that would be code in Texas. Interesting. Condensate from an evaporator coil is non-corrosive. Why can't it just go on the roof and drain the same way as the rain?
It is a slip hazard. It can not drain to a side walk or driveway. Draining on a roof is no longer code here. My guess is an inspector slipped on a roof lol now it’s no longer code.
@@actechformallyyomama746 Weird. Around here in Illinois, the roofs typically have drains that go direct to the sewer so the condensate never makes it to a sidewalk.
It’s about 50 50 here. If the roof does not go to a storm sewer, grass or flower bed than you have to run the drain inside the building to an approved drain. A restroom sink or a floor drain. This is a bad idea. I’ve seen it flood a business when the sink clogged and the AC kept running. Residential must run to a restroom sink drain. Previous the trap. And this also flooded the house. Proper thinking has been thrown out the door. This has been code here for many years. I believe it will change when the insurance companies complain about claims.
@@actechformallyyomama746 Insane. They are taking something that has no issues (water on the roof of a building) and making it into an issue. In fact, we don't see how code would even allow... let alone require... you to run condensate into a restroom sink. That would be prohibited here by our plumbing codes.
@@TECTubefilms I think they mean the exhaust is getting reentrained on the fresh air intake on the economizer. I only watched the first economizer video (from the link posted on this video) and wondering about possibly mixing exhaust with supply. Hypothetically if economizer is open 50% and the exhaust damper is open 50%, what keeps airflows from mixing?
@@bryanprince8184 I suppose exhaust mixing back with intake air is a possibility. However, the exhaust is exiting with velocity pressure which is pushing it away from the unit, making those air molecules less likely to be the ones that the OA intake is sucking in. Additionally, the International Mechanical Code allows for up to 10% inadvertent re-circulation of this class of air. This exhaust is just regular room air. It is not hazardous. It is not even objectionable in odor like toilet exhaust or something like that. The exhaust air on a RTU economizer hood is simply just a portion of your regular return air that you had planned on recirculating anyway.
What do you mean? If you don't have a condenser fan, how are you going to move the heat away from the condenser coil? You would have to have a giant condenser coil in order to rely on radiant heat removal and natural convection. So the benefit of the fan is mechanically forced convection and hence and much, much, much smaller coil.