I've had to replace the outdoor coil on a Daikin VRV II system because the grounds keeping crew decided the equipment corral was a good place to store stuff. A shovel got tossed over the fence into one.
I'm guessing Mitsubishi doesn't charge any less for theirs than Daikin does, and that it is just as much of a PITA to replace.
Originally Posted by fenian
Whose condensers are those? Never seen them before. Are they twinned together normally?
They are Mitsubishi City Multi VRF units.
They are 3 individual variable capacity machines, each with multiple indoor units.
Each system has a single piping system, that runs from the outdoor unit to a box inside, that then has piping to the indoor units.
If they are heat pump systems with heat recovery, they can do simultaneous heating and cooling of different zones by using the heat absorbed to cool some areas to heat other areas. The outdoor coil will run in either heating or cooling to make up the difference in what is needed.
I don't know the Mitsubishi system that well, but like Daikin VRV systems, I believe the outdoor units can be manifolded together to make one larger system.
If more government is the answer, then it's a really stupid question.
Mark got it. System is amazing just sucks how building engineers take care of there things .. I asked him who and why it was put there and he said cause he didn't want to put it against the wall.. he said beside the unit has warranty of anything happens. I said not after these pictures.. he got so mad at me.
I just wish Daikin and Mitsubishi didn't charge so damn much for the service tool to interface between the equipment and a laptop.
I'm not sure what all the Mitsubishi service tool can do, but for the price someone mentioned to me, I'm guessing it can be left connected, without a computer connected, to data log like the Daikin Service Checker can.
Does it also have plugs to test sensors and such?
Fujitsu just recently came to the US market with their VRF systems. No service tool needed, you use a special cable to connect a laptop directly to the communications buss, and the software automatically shows a graphical layout of what is connected to the system!
If more government is the answer, then it's a really stupid question.
I Dont work on them enough to buy the tool yet.. but if more calls come in for them I have to lay out the money for it.
On Daikin systems you can do sort of a gheto service tool with one of their navigation controllers(programmable thermostat).
It won't do much, or look at the whole system at once of there are multiple groups of indoor units on the same system, but you can at least see the saturated temperatures of the refrigerant, and thermistor readings for all of the indoor units within the group you have it connected to.
If Mitsubishi has a similar thermostat, its worth a couple hundred bucks to get you by until you are ready to spend >$2000 for the service tool and software.
I'm guessing you have already figured out that there is little to nothing to be learned from hooking gauges up to one.
If more government is the answer, then it's a really stupid question.
As opposed to what?
The maybe 5-7 years you get out of most of the usual light commercial equipment before it starts going to crap?
If US residential and light commercial HVAC equipment manufacturers were doing much more than just adding fancy controls to 50+ year old technology, based on nearly 100 year old design principles, this thread probably wouldn't have a picture of Japanese made VRF outdoor units in it...
If more government is the answer, then it's a really stupid question.
Maybe it's just who we deal with but the Mitsu service tool is like 300 bucks and the Daikin was some incredible dollar ammount.
If US residential and light commercial HVAC equipment manufacturers were doing much more than just adding fancy controls to 50+ year old technology, based on nearly 100 year old design principles, this thread probably wouldn't have a picture of Japanese made VRF outdoor units in it...
For real. But reading the litterature for the equipment would be no fun if these were US products , lol.
As opposed to what?
The maybe 5-7 years you get out of most of the usual light commercial equipment before it starts going to crap?
If US residential and light commercial HVAC equipment manufacturers were doing much more than just adding fancy controls to 50+ year old technology, based on nearly 100 year old design principles, this thread probably wouldn't have a picture of Japanese made VRF outdoor units in it...
Reply With Quote
It`s better to be silent and thought the fool; than speak and remove all doubt. 
Originally Posted by fenian
Subscribe to this feed
The place where Electrical professionals meet.
