This is a question pertaining to code word COMPRESSOR-TYPE. I am modeling a Packaged Var Vol system with modulating compressors. For some reason the drop down box for Compressor Type under Unitary power for Cooling has been grayed out. I have replicated the help menu for this code word below and it seems like this option should be available for PVAVS system types. Thank you in advance!

COMPRESSOR-TYPE

Takes a code-word that specifies the compressor speed control mechanism; this keyword is intended for use in modeling a packaged direct expansion heat pump or air-conditioning that incorporated variable speed compressor control: It is suggested that the SYSTEM:AIR/TEMP-CONTROL keyword be used for systems which incorporate multiple steps or stages of capacity rather than this keyword/codeword combination.

VARIABLE-SPEED - specifies that the compressor can vary its speed to exactly match the capacity required. This is applicable to RESVVT, PSZ, PVAVS and PVVT systems.

Linda Lam, LEED?? AP