Single enthalpy changeover - 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

This section applies when the free cooling current mode is single enthalpy.

For single enthalpy economizer operation, the outdoor air is suitable for free cooling if the outdoor air enthalpy is at least 1 BTU/lb below the economizer outdoor air enthalpy setpoint and the operational outdoor air temperature is less than the outdoor air temperature enable setpoint (EconOAT-SpEn).

Free cooling is no longer available if the operational outdoor air temperature rises above an outdoor air temperature enable setpoint (EconOAT-SpEn) or the outdoor air enthalpy rises above the economizer outside air enthalpy setpoint.