Option 1 for District Thermal Energy

I’m modeling a building that is connected to a district CHP system that produces heat and electricity. No cooling system, neither in the building nor in the CHP system, is available. There is no back-up energy. I’m using the document “Treatment of District or Campus Thermal Energy in LEED” and since detailed data concerning the CHP system are not available I’m using Option 1 (streamlined path). The building is nonresidential and its surface is less than 2300m^2. For the baseline model shall I use system 3 or system 4 of table G3.1.1A? Because of Table 2 and Table 3 of “Treatment of District or Campus Thermal Energy in LEED”, I guess that I have to model "PSZ-AC w/distrct heating". Am I right? What efficiencies shall I use (par. 2.4.1.2.3 and Appendix D regard Option 2 while I’m using Option 1)? I guess that I have to consider the purchased heat, not the primary energy, both for the model of the proposed building and for the baseline model, therefore efficiencies shall not be considered for heating. Am I right? Regards