Vrv systems

[DAVIDS]

Hi , i'm a student at college and a question i have been set is what is the difference between the operatin priciples between a 2 pipe and a 3 pipe system , Can anyone help

Thanks David

[DVaider]

Hi, DAVIDS!

Try to check this link:

http://www.pacificairconditioner.com/DAIKIN.html

And this very interesting video:

http://www.youtube.com/watch?v=MN-rItSpQ7c

[The Viking]

Or use the search function on this forum...

We had exactly the same question from another student about 6 months ago.




BTW. The answer is:
The 3-pipe unit will provide heat recovery (=simultaneous heating and cooling). Unless you are looking at a Mitsubishi Electric system, they manage to do with 2 pipes what the other manufacturers needs 3 pipes to do.

[2007eng]

2 pipes for heat pump (Just Heating or cooling)
3 pipes for heat recovery (cooling with heating)