Eng. Sayed,
I usually build up this kind of air handler from its component pieces (some combination of a fan, a heating coil, the DX cooling coil and perhaps an enthalpy wheel). A DX coil can be modeled using a performance map that gives COP as a function of the air conditions entering the evaporator and the condenser. There are a few different components TESS HVAC library (in the "air handler components" folder).
kind regards,
David