I have an American Standard Split System - TAM7 Air Handler (Indoor Unit) and 4TWB3030 Heat Pump (Outdoor Unit). The TAM7 Air Handler came with an installed Electronic Expansion Valve (EEV). Question is, should there be a second Expansion Valve (a TXV) installed at the 4TWB Heat Pump? The units are 35 feet apart (¾, ⅜ Line Set). Location is Central Kentucky.
I want to make sure I am getting the maximum efficiency out of the system.
I appreciate your help and insight! Thank you!