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

Thanks for your videos

Thanks for the video

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

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

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.

@TECTubefilms

3 жыл бұрын

We are not very familiar with LG or Mitubishi at our office, but we have not experienced those issues with brands we have used over the past 12 years, which include Carrier, TOSHIBA-Carrier, Bryant, SANYO, and Panasonic.

Very well explained

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

@gkairconditioner9858

3 жыл бұрын

Thanks dear

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

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

You have class information

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

@TECTubefilms

2 жыл бұрын

All of the projects we are involved with are in the Midwest so we don't have much expertise in your climate. In general, VRF is not the best fit for residential unless the home is massive. Multi-zone ductless with variable speed inverters is better utilized in residential applications than VRF. Cost and install are lower.

@TECTubefilms

2 жыл бұрын

In regards to brands, we rep Toshiba and Carrier VRF so we are a little biased toward them

@shenoyglobal

2 жыл бұрын

@@TECTubefilms is it not the best fit for residential use because of cost and install or are there any other reasons Also residence is 7000 sq ft

@TECTubefilms

2 жыл бұрын

@@shenoyglobal One of the biggest advantages of VRF in our climate is heat reclaim mode where it sends heat from the interior zones (which need year round cooling) to the perimeter zones which need heat in the winter. A residential home does not need that in any climate. Non-heat reclaim style VRF is also not usually first cost effective for small tonnage applications which a 7,000 ft2 residence would be. Additionally, VRF pipe sizing and layout is more complicated that ductless mini-split or other systems. You need a more sophisticated contractor who has done multiple VRF installs and you are not their first customer. As with all system choices, it all comes down to what you are comparing it to. If the home already has duct systems, then replace the old A/C units with residential inverter driven variable speed A/C units that tie to variable speed fan coils and existing ductwork. If there is no ductwork, then consider inverter driven variable speed mini-splits units that allow multiple indoor units just like VRF. What advantage do you believe that VRF would have over those two types of systems in a residence?

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?

@TECTubefilms

Жыл бұрын

Local codes do have limits on how much refrigerant of certain classifications can leak into certain types of spaces. Most of these codes are based on ASHRAE Standard 15. We suggest you watch this other video from 2015 (starting at the 1 hr and 5 minute mark) to better understand how this applies to VRF systems. kzread.info/dash/bejne/mXaDutmSnZzYiJc.html

@TECTubefilms

Жыл бұрын

We have been doing VRF systems at our office since 2008 and none of those installations have experienced a compressor burnout. Burnout is generally causes by high temps in the discharge or motor windings and since most inverter compressors have extra sensors and controls to babysit things like that, it is more likely the system would lock out in those situations instead of continuing to run and damage the compressor. Additionally, since an inverter compressor seldom operates at 100%, there is less waste heat coming of the motor windings in general.

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

@brlinrainf

5 күн бұрын

idiot, one pipe is always liquid but the other one can change between suction and discharge

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

@TECTubefilms

3 жыл бұрын

Other than the inside of the cabinet being fairly space constrained because of all of the extra piping in there, replacing a compressor on a VRF system should really be no different than replacing one on a regular system.

@aceahmad6795

3 жыл бұрын

@@TECTubefilms thank you so much Sir for your reply but I mean how to flashing the system if compressor 2 is still working but compressor 1 is showing ground

@TECTubefilms

3 жыл бұрын

@@aceahmad6795 We just asked our trainers and they don't have a video in their library for that. It is, however, the exact same process for a non-VRF system that has multiple compressors on the same refrigeration circuit. Nothing special because it is VRF.

@aceahmad6795

3 жыл бұрын

@@TECTubefilms okay sir thank you for your kindly support

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

Please share carrier vrf gas recovry setting

do u have any online classes for these vef units

@TECTubefilms

3 жыл бұрын

April 6 - us02web.zoom.us/webinar/register/WN_YJ9kl-vvRZWzgAS5FNs9nA

Nice, but very expensive ..

@TECTubefilms

3 жыл бұрын

Expensive relative to what?

@abdullah_q8171

3 жыл бұрын

@@TECTubefilms price VRF expensive

@abdullah_q8171

3 жыл бұрын

Wich gas is butter R22 or 410 package? In my country still selling R22.. What you recommend for me to go with?

@TECTubefilms

3 жыл бұрын

@@abdullah_q8171 The price of VRF compared to what other type of system? Compared to individual ductless systems? Compared to a chiller and fan coils? Compared to ducted VAV air handlers?

@TECTubefilms

3 жыл бұрын

@@abdullah_q8171 Our answer may be biased because we have been using R-410a since 1996 and we completely stopped using R-22 equipment in our country back in 2010. In fact, we are getting set to start the phase-out of R-410a and move to R-454B and other refrigerants that are even safer for the environment.

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

@Justaguy0420

3 жыл бұрын

What manufacturer did you guys use? LG will do this if you lose a head. Mitsubishi won’t. Mitsubishi’s power for its comm line comes from the ODI while if someone turns power off to a head of LG the whole system will go down.

@TECTubefilms

3 жыл бұрын

It will depend on why it shut down AND how you piped it AND if you by unit you mean indoor or outdoor.

@FlyEaglesFly19111

3 жыл бұрын

Samsung is the brand. Yes if say 1 indoor unit looses power it stops the whole system. As the Samsung is daisy chained. So each board HAS to be energized to make the system work.

@Aabidmehraj

3 жыл бұрын

Will good thing is Toshiba system will not stop if any unit losses power.

@KomatsuHB215LC-1

2 жыл бұрын

One indoor unit kills power and whole thong dies? wtf

6 ton vrf perfect for 800sq apartment

@TECTubefilms

2 жыл бұрын

Haha... for most climates 6 tons would perfect to share for an entire apartment building with six 800sqft apartments

@KomatsuHB215LC-1

2 жыл бұрын

​@@TECTubefilms is 6ton 8 hp

@TECTubefilms

2 жыл бұрын

@@KomatsuHB215LC-1 what do you mean?

@KomatsuHB215LC-1

2 жыл бұрын

@@TECTubefilms I wanna know if 6ton and 8hp are the same

@TECTubefilms

2 жыл бұрын

@@KomatsuHB215LC-1 We suppose you could convert tonnage to horsepower, but no one ever speaks of cooling capacity in terms of horsepower (at least no in the US). We just converted it (actually converted tonnage to kW and then kW to hp) and 6 tons of cooling is 28.3 hp. Why do you need to know it in terms of hoursepower? What are you trying to figure out?

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

@TECTubefilms

5 ай бұрын

Não, desculpe. Só podemos distribuir equipamentos e peças em determinadas áreas dos Estados Unidos.