CV option A occupied - 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

When free cooling is available and the operating space temperature is greater than the operating cooling setpoint, the dampers modulate to control the upper SAT setpoint +/- 0.5°F.

If the economizer output is at 100% for 5 consecutive minutes and the operating space temperature is 0.6°F or greater than the operating cooling setpoint, the staged percent command starts to increase and energizes compressors. See Table 1 for additional information.

As soon as the staged percent command begins to increase, the economizer remains at 100%. If the operating space temperature drops to less than 0.6°F above the operating cooling setpoint, the staged percent command holds the current value.

If the operating space temperature drops 0.6°F or more below the operating cooling setpoint, the staged percent command begins to decrease.

If the staged percent command remains at 0 for 5 consecutive minutes the economizer modulates to control to the upper SAT setpoint +/-0.5°F.