sumsor
08-07-2010, 11:09 AM
Hi There,
I've installed quite a few city multi systems in the past and got recently to install a couple of Daikin VRV systems.
I found the mitsi system a lot easier and quicker to install. The BC box system pipework is easy to oversee, two pipes for the mains and then the pipesize off the bc box depending on the indoor unit size. Only for the slave bc box three pipes.
Generally the mains to the box are smaller, as with Daikin the pipesize reduces the closer you get to the last unit. Sometimes it is a bit confusing with the various different pipesizes, three refnets for one bs box could have up to nine different sizes!
I also found the pipe length restrictions a lot easier to calculate and better suited for larger commercial buildings with mitsi.
I'm not too sure about the price for each system, but it seems you need more gear for the Daikin system, i.e. more bs boxes, refnets.
For servicing the mitsi dip switch system seemed easier(can't remember how the Daikin system is called).
I never had any big problems with any of the systems but found the service and training provided by Daikin a lot better.
I would greatly appreciate any input from other installers and maybe some technical background why one or the other system is better.
Cheers
Sumsor
I've installed quite a few city multi systems in the past and got recently to install a couple of Daikin VRV systems.
I found the mitsi system a lot easier and quicker to install. The BC box system pipework is easy to oversee, two pipes for the mains and then the pipesize off the bc box depending on the indoor unit size. Only for the slave bc box three pipes.
Generally the mains to the box are smaller, as with Daikin the pipesize reduces the closer you get to the last unit. Sometimes it is a bit confusing with the various different pipesizes, three refnets for one bs box could have up to nine different sizes!
I also found the pipe length restrictions a lot easier to calculate and better suited for larger commercial buildings with mitsi.
I'm not too sure about the price for each system, but it seems you need more gear for the Daikin system, i.e. more bs boxes, refnets.
For servicing the mitsi dip switch system seemed easier(can't remember how the Daikin system is called).
I never had any big problems with any of the systems but found the service and training provided by Daikin a lot better.
I would greatly appreciate any input from other installers and maybe some technical background why one or the other system is better.
Cheers
Sumsor