I have 2 Carrier Infinity gas furnaces (1 is an Infinity 58MVC - installed in basement, and the other is an Infinity 58CVA - installed in attic). I have 2 Carrier Performance Heat Pumps ....
Our HVAC company installed Carrier Edge Thermostats (the ones with the controller mounted by the furnace). The systems are wired conventionally and configured for 2 stages of gas heat as well as heat pump/AC control. They work fine .... Current basement furnace uses Thermostat to control Humidifier (AprilAir 600) as well.
I hear people talk about the Infinity thermostats .... they provide more information about the system, provide readout of static pressure, etc...
1) If I were to have my HVAC company replace the thermostats, would they need to also change the wiring to the Performance Heat Pump units (i.e.: use the ABCD wiring/communicating instead of conventional)?
2) My HVAC company was not originally aware of this option when they were installing the systems originally because they ended up running new low voltage wiring to one of the units because there were not enough conductors with the existing wiring (for the previous AC unit that was replaced). What does my HVAC company need to ask for with respect to ABCD/communicating plugs/etc. that we assume din't come with a replacement Infinity Thermostat and did not come with the furnace/heat pumps?
3) I have a BGE energy control on each heat pump - There would need to be some sort of change to this as well if I replaced the Thermostat(s)?
My HVAC company did a very good installation of the system (Manual-J, reduced size of system, checked combustion, etc.) but did not have as much knowledge with respect to the Infinity control options (they install mostly Performance series and are much more familiar with Edge Thermidistats). I am just curious if there is any benefit with my setup?