VRF System Overview

[tokenlectronix]

Sounds like a engineer's wet dream and a technicians worst nightmare.

[Justaguy]

I work with LG and Mitsubishi VrF HR and the “Free energy” or moving BTUs from one area to the next doesn’t actually work in the field. I had service call after service call from a vertical system design in a 650 apartment unit mid rise building. When we had a diversified system neither heating or cooling were doing any actual work. I personally logged hundreds of hours of data showing the delta across each IDU proving no change of state.
This became such a problem we flew LG engineers out from Korea and in short they acknowledged a design flaw with the BC box in heat recovery. This issue became a lawsuit and insurance claim as we were the installing mechanical contractor. LGMV Multiv4 was the equipment installed.
I have similar stories with Mitsubishi equipment although Mitsubishi design is by far better than LG. Water hammer noise with the BC box shutting down its solenoid was also a huge complaint with LG.

[Fernando-bqcv]

bruh i kid u not im barely a month in to commercial hvac with almost no experience and i had a service call for this exact vrf i was so overwhelmed lmfao

[davidp]

Thank you for this video - really valuable information in here, and very well presented!

[rodgraff]

I thought there were limitations on how much and what type of refrigerants that could be circulated thru a building in case of fire. Seems like a nice system, until you have a running burnout, that would require a complicated clean up. Has anyone experienced a bad compressor burn out on a large VRF system, and how did you deal with cleaning it up?

[shenoyglobal]

Would you suggest a Hybrid VRF system in Florida for a 2+1 REsidential use. If so what make and manufacturer do you suggest.. I have heard good review on Mitsubishi

[youcefcherraba]

thanks for the knowledge you dropped, and i'd appreciate any printables you might have to help me with my graduation paper

[TorPid]

Is there any continuity plan with this system, supposedly if the machine breaks down that mean all indoor machines go down with it unlike independent units... My question is, can we have an standby unit along with main unit?

[hondoshaver]

Wow, that's a sweet technology but seems like it could be a troubleshooting nightmare o.O

[aceahmad]

Please Post a video for compressor replacement method and how to check defective compressor

[merajahmad]

I am vrf technician specialist in toshiba vrf I remember your language in about of vrf

[derrickgarcia]

On the 2 pipe VRF heat recovery. Is one pipe liquid and one suction?

[gkairconditioner]

Best toshiba carrier vrf unit, I installed 44/ 54 h P unit good quality

[jsmitty]

I know this video is old but what is the process for pressure testing the unit and evacuation of the system. I'm just started on my first one today

[sincityhvacr]

do u have any online classes for these vef units

[brijeshgurjar]

Please share carrier vrf gas recovry setting

[FlyEaglesFly]

We have used a different brand and if one unit shuts down it takes out the whole VRF. have not yet used Carrier.

[gilsoncampair]

Boa noite!
Sou instalador aqui em São Paulo (Brasil ) estou precisando de peças vocês consegue nos fornecer?