Free cooling changeover options - Johnson Controls - LIT-12011950 - Building automation software - Smart Equipment Controller - 5.0

Smart Equipment Controls Sequence of Operation Technical Bulletin

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

Four types of free cooling selection (FreeClg-Sel) options are available: dry bulb temperature, single enthalpy, dual enthalpy, differential dry bulb, and auto.

Setpoints and related data

The setpoints are related data include the following items:

Note: All the setpoints are free cooling setpoints.
  • Economizer free cooling type (FreeClg-Sel)
  • Free cooling current mode (FreeClg-Mode)
  • All compressors OFF in free cooling (AllCompOff-Econ)
  • Economizer outdoor air temperature enable setpoint (EconOAT-SpEn)
  • Economizer outdoor air enthalpy setpoint (EconOAEnth-Sp)
  • VAV cooling supply air temperature upper setpoint (SATUp-Sp)
  • VAV cooling supply air temperature lower setpoint (SATLo-Sp)
  • Outdoor air enthalpy (OA-Enth)
  • Return air enthalpy (RA-Enth)

Inputs

The inputs include the following items:

  • Operational outdoor air temperature (OprOAT)
  • Operation outdoor air humidity (OprOAH)
  • Supply air temperature sensor (SAT)
  • Return air temperature (RAT)
  • Operational space humidity (OprSH)