Can I use the ACiQ TL04-1 Smart Thermostat with these units in a two wire communication configuration HA HB?

Yes, the ACiQ TL04-1 Smart Thermostat is compatible with the ACIQ-48-HP-E-32 outdoor heat pump and ACIQ-48-AH-E-32B indoor air handler using the two-wire HA/HB communicating configuration. The thermostat connects to the air handler through the HA and HB terminals, while the air handler communicates with the outdoor unit through its S1 and S2 terminals.

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