HVAC

[Sigarms]

this .....Gree VRF GMV5 Heat Pump 48 Btu | rh newtons is more like that unit I will be installing.

At this time, I don't have any model numbers, or much tech info.
When the units arrive, I will post those numbers for you

The unit is rated @20 seer non dutced
Rated @ 16.5 seer ducted

My duct is round all joints are taped and also have mastic

Thanks, I'm sincerely curious. I could call and engineer but I don't want to have to drag a social media forum into the converstation trying to figure out what you're getting when it really doesn't affect me.

You're a better man than I. Model numbers and install manuals are mandatory reading BEFORE you do the job LOL

I know, you put one in, you put them all in...

 

[kenmac]

you can bet, I'll get all the manuals with the unit, and study them before the install, to be sure there's nothing special I need to do.

I know the AH will go right in the same spot as the current Trane AH without having to install any new transitions, etc.

You Put one in you've put them all in ?

I wouldn't say that's quite an accurate statement

 

[Sigarms]

You Put one in you've put them all in ?

I wouldn't say that's quite an accurate statement

I was being VERY sarcastic:laughing:

Good policy is when new equipment is being installed, have the installers read the equipment prior to install and ask questione before hand. Hour of reading can save a 3 hour headache out in the boonies when you know what you need.

 

[kenmac]

I was being VERY sarcastic:laughing:

I knew you were LOL.

This being a new product / equipment. all the I's will be dotted and T's will be crossed.
Then again, I could just install and worry about the details/ issued when they pop up ! :laughing:

 

[Haneyrm]

I own a consulting engineering firm and can confidently assert that VRF has gained major ground in the U.S. over the past 6-7 years and it continues to become more widespread. Of the projects we design, roughly 60% now have some level of VRF included. The technology is solid, options are far more widespread than traditional DX systems and the energy efficiency can be off the charts if implemented correctly. Simultaneous heating and cooling from a single condensing unit is commonplace for heat recovery VRF systems and inverter driven compressors unload to match cooling or heating demands which leads to even higher efficiencies and extended run-times which helps with humidity control and flattens out the over/under shooting of setpoints.

It's good stuff.

 

[Haneyrm]

VRF installers have to be factory certified for installation. They do not pipe like a traditional DX split system. Some systems require refrigerant management or distribution manifolds and there are rules that have to be followed on refrigerant piping overall length, max distance between distribution manifold and furthest air handling unit, max vertical separation between air handling units and the condensing unit and most importantly, ASHRAE 15 limits the amount of refrigerant that can be included in the system based on the volume of the smallest space served by the system. It's a life safety measure to make sure that if you have a refrigerant dump, the concentration is not so high that you are not able to escape before you drop.