If you only need Electricity:HVAC, you can put it in the meter file with this line:

Output:Meter:MeterFileOnly,Electricity:HVAC,runperiod;

In the RVI file, make sure each parts are on separate lines, like this:

eplusout.mtr 
eplusout.csv 
Electricity:HVAC 
0

Output:SQLite and Output:Diagnostics may not be necessary in the parametric run.