Replies

1. Expert Member
   Dana Dorsett | Jul 02, 2018 12:28pm | #1

   NEEP's database doesn't list the 2- tonner, but the max capacity of the 3-ton 4TWV8036A1 is pretty much the same as it's AHRI rated numbers @ +17F. So just assume the AHRI rating is it's max capacity, give or take.

   With the 3 tonner, depending on which air handler, at +17F you get :

   minimum rated maximum

   16,040 26,800 26,900
   16,700 26,800 26,900
   16,370 26,600 26,700

   At +47F it has wider range. At that temp depending on air handler option you get:

   minimum rated maximum

   8,500 33,200 33,400
   8,500 33,000 33,100
   8,400 32,800 32,900

   At +5 F the modulation range is narrower still

   minimum maximum

   16,894 20,420
   17,640 21,040
   17,194 20,600

   I suspect it's a similar story with the 2-tonners.

2. Expert Member
   Dana Dorsett | Jul 02, 2018 03:17pm | #2

   On the mass.gov website they have more info on the 2 tonner. It's AHRI rated output @ +17F is 16,800 BTU/hr (so it's max is probably less than 17K), and the max output @ +5F is 13,000 BTU/hr.

   https://www.mass.gov/files/documents/2018/02/07/Eligible%20Small%20ASHP%20-%20Clean.xlsx

   There's nothing about it's minimum modulated output, but on the NEEP spreadsheet both the 3 ton & 4 ton units can modulate down to between 1/4-1/3 of the "rated" output at 47F. The AHRI rated output of the 4TWV8024A1 at +47F is 20,000 BTU/hr so it's minimum @ 47F is probably between 5000-7000 BTU/hr.

   http://www.neep.org/sites/default/files/ColdClimateAir-SourceHeatPumpSpecificationProductListing-Updated6.22.18_0.xlsx

3. 
   Stockwell | Jul 06, 2018 12:36pm | #3

   I had this saved for the model that is one step higher than the XV18 https://www.greenbuildingadvisor.com/sites/default/files/Trane%20XV20i%20air-source%20heat%20pump.jpg