My HVAC guy ordered a model number: TTV064*GE01JLKS with AGL15A TT = Tranquility 27 two stage R410-A V = Vertical 064 = 064 MBtuh * = Revision Level * G - Voltage 208-230/60/1 E = CXM w/ ECM Fan (GS Only) 0 = Residential Class 1 = HWG w/ Internal Pump J = Cupro-Nickel Coated Air Coil L = Left Return K = Supply Air FLow and Motor Option TOP - TSV - ECM S = Standard It looks like we received: TTV064 AGC01JLKS TT = Tranquility 27 two stage R410-A V = Vertical 064 = 064 MBtuh A = Revision Level * G - Voltage 208-230/60/1 -- C = CXM --------------------------- 0 = Residential Class 1 = HWG w/ Internal Pump J = Cupro-Nickel Coated Air Coil L = Left Return K = Supply Air FLow and Motor Option TOP - TSV - ECM S = Standard There seems to be a difference in CXM and ECM.... we thought ECM was what we needed/wanted when the sales guy originally put together the order? We had planned Honeywell Vision Pro tstat and variable speed. Is this OK?

For some reason, the line breaks did not format... Issue resolved (I think). It looks like the E option (ECM - gs only) meant Genesis only. The C option was all that was available, and the fan control board in the unit did look like the ECM v2 board in the installation guide. So all must be OK, right :-)

Ummm, sure, get an installer you trust and these nagging questions will go away.
j

First off I don't even know what GE refers to in the first one. The product catalog has all the Tranquility 27 two stage unit model number all have AG in the beginning of there model numbers, GE doesn't correspond to anything. Are you sure they quoted it to you right?