The local installer just put in a new Lennox system XP19060 / CBX32MV060 / T4147 stat.
When the installer left the air handler produced cold air in cool mode but at a low rate (The air handler was hardly audible) even after runniong for over 10 minutes.
When I checked the wiring in the air handler I found that the R, G, and C wires were connected to the T-stat (as expected) but the O, Y1 and Y2 lines were connected straight from the T-stat to the Compressor unit without being connected to the terminal blocks in the air handler.
The manual shows these wires (O, Y1 and Y2) being connected at both the compressor and the air handler, but the installer says they have instructions to avoid connections to the air handler whenever possible and only connect these signals to the compressor.
When I look at the wiring diagrams in the manual I can't see any way that the air handler can work properly without these connections.
Is there any instruction from Lennox to skip these connections in the air handler ?
Second (minor) question - the installer put a wet switch in the air handler drain pan, that is connected between the R terminal in the air handler and the R leads that go to the T-stat and compressor. The documentation for the wet switch says it should be in the Y line between the T-stat and the air handler. Since this is a 2 stage cooling, putting the switch on the 24VAC (R) connection does not seem unreasonable - any thoughts?