Compressor staging - Johnson Controls - LIT-12011950 - Building automation software - Smart Equipment Controller - 5.0

Smart Equipment Controls Sequence of Operation Technical Bulletin

Product name
Smart Equipment Controller
Document type
Technical Bulletin
Document number
LIT-12011950
Version
5.0
Revision date
2024-06-06
Product status
Active

While modulating HGR is active, the staging of compressors is controlled by comparing Evaporator Coil Tempand OprEvapTempSp. If Evaporator Coil Temp > OprEvapTempSp, then StgClgCmd increases and compressors turn on. If Evaporator Coil Temp < OprEvapTempSp, then StgClgCmd decreases and compressors turn off.

Traditional thermostat calls (Y1, Y2, etc.) will not directly cause compressors to stage on/off. However, they are used to determine if there is a demand for cooling.