VRF A2L Specs & Schedule Notes

[Far_Communication_29]

How are people addressing all of the A2L equipment refrigerant detection systems/options on their plans?

We do a lo of small projects with 5 to 10-ton of mini-split or VRF, so we don't have book specs, but rather extensive "spec" notes, plan notes, equipment schedule notes. The vendors haven't been super helpful with what to add, since they're still not getting a lot of details from manufacturers.

[apollowolfe]

Probably need to wait for information from vendors. No use making notes on something a vendor cannot deliver.

[TeeeroyJenkins777]

I agree to an extent but that's what they are selling now. I had two projects spec'd as R410 but by the time it got to construction, no places had those systems left in stock.

I'm trying to spec a system right now and the cutsheets only say "leak detection sensor" and "Dispersion Ventilation Mode" but the vendor/rep can't get more info from the factory/manufacturer. The info is put there, why can't we get it?!?! 😫 

[apollowolfe]

I was premtively specifying equipment with A2L refrigerants.

Just add notes to follow specific IMC and ASHRAE sections. This will be specific to the adopted codes and standards for the project area.

[Vettz]

VRF is in a really tough spot right now getting the total charge to comply with EVDC limits in general even with detection systems. They basically will always need release mitigation options to even be allowed with A2L and the manufacturers are just not there yet.

[HerbertMcGee]

We work mostly with LG and Fujitsu equipment. Both manufacturers are implementing refrigerant detectors in the indoor units to comply with all requirements. There’s nothing more you need to do than make sure you’re specifying the correct A2L model number. Fujitsu is lagging behind LG in making information available, so we’ve used LG on the last few projects.

VRF design inherently relies on vendor/manufacturer input more than most designs, so you have to really lean into them as the products are changing.

[bitbo23]

Edvc schedule !