VRF Pipe Sizing MUSTS | Importance of Proper As-built Lengths and Sizes 7-30-2022
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- Опубликовано: 12 сен 2024
- I hadn't planned on making this video this weekend but along came a spider this week that spun a web of chaos on a project - and I think this is a good lesson for everyone to learn.
I cannot express just how important it is, that you need to follow the piping schematics during install, you need to get the sizes and lengths correct and accurate. Otherwise you will have problems, period.
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All content, material and commentary in this video and on this channel is my sole opinion and perspective only. None of my content is approved as Factory Authorized Training, nor training of any kind. Always refer to the installation manuals shipped with equipment and contact the factory or local technical support of the vendor in the event of needed support.
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Hey im a new subscriber, great inverter content amazing great info. I live in nyc and i see this all over on 30 floor buildings .
I have a question do you know a good VRF training courses ??? Any state its fine. It would hepl me
Theres one in washinton it’s called BOLAND VRF training. Im trying to go in February. Thanks for your amazing videos
Daikin has a training center in New York you should go, they do trainings there all the time. Vrv install, commissioning, service and troubleshooting, controls etc..
Awesome! I want to install Daikin VRVs as well, is there a way we can get the program you're using Dana?
Dana, you’re looking fabulous. A guy lost a bet to me and owes me a VRV and 3 heads. I’m going to install it in my shop in the coming months. I can’t wait to show you the Nav settings. I want to keep it just above freezing in the winter and just below boiling in the summer. And jussst right on poker nights.
Nice! What was the bet?
@@InverterAlways Are you really sure you want to know? It’s okay to say no.
@@mcdouche2 I don't really care either way I was just being conversational. Its cool that you won a whole system though hopefully the person comes through.
@@InverterAlways it was LONGGG odds. Anyways he has a lot of old scratch and dent inventory. He’ll write it off.
Hey Dana,
How can I make a schematic if there are already 3 outdoors? Let's say there are 2x of reyq14 + 1x of reyq12 that I want to put as outdoors (master + 2x slaves = 14+14+12) units?
Xpress does not allow me to choose number and models of outdoors...
You need to adjust connection ratio Max allowance along with block loads for heat and cool such that the software selects that overall model size.
Seems like you know quite a bit about the Daikin lineup- quick question- that daikin cannot seem to answer for me. I’m used to only installing Mitsubishi Ductless- and specifically with their Multi zone outdoor units- their fans will noticeably run at many different speeds (sometimes barely spinning, sometimes full crank). I just started installing daikin due to availability and my first system was a 4 zone 4mxs36rmvjua- and the outdoor fan seems to run at a good rate regardless of what the indoors are set at/ doing. It never ramps down very low/ is this just a daikin thing or do I have a bad board possibly?
I would say neither. Depending on load and mode of operation the outdoor fan will ramp up or slow down as needed. If I recall there are somewhere around 5 to 7 fan speeds on the outdoor DC motor buy don't quote me on that I would need to verify in the service manual. You can plug in a dchecker to see the internal logic and data points to verify as well. Usually the outdoor fan runs harder in heat mode compared to cool mode but again will ramp up or down as needed with load as well. I would say to just monitor the system for a while as it ramps up to meet a high load then slows down as it approaches target. You should see a change.
Can you explain what declaires the maximum length between the branch and the furthest unit? Why is it 131.2 feet?
this is calculated and tested by the factory so i cannot say "exactly" why they determine this length. Usually though it is a combination of maintaining proper oil return and capacity. too long and the line set size may need to change, and capacity could drop. if refrigerant velocity drops too much due to the line length being too long, you then also run into oil return issues which will delete compressors.
@@InverterAlways Thank you very much.
biggest killer of vrv systems
Yup and biggest killer of my patience 🤣