VAV unoccupied cooling - Johnson Controls - LIT-12011950 - Building automation software - Smart Equipment Controller - 5.0

Smart Equipment Controls Sequence of Operation Technical Bulletin

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Smart Equipment Controller
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Technical Bulletin
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This section details the VAV unoccupied cooling setpoints, related data, inputs, outputs, and operation.

Setpoints and related data

The setpoints and related data include the following items:

  • VAV unoccupied cooling setpoint (VAVClgUnocc-Sp)
  • Operational space temperature (OprST)


The output for VAV unoccupied cooling is 24 VAC from C1, C2, C3, and C4 compressor outputs.


The control must be in an unoccupied mode and not in morning cool-down mode. If the operational space temperature rises higher than the VAV unoccupied cooling setpoint all compressor stages energize with a 15-minute delay between stages.

Compressors remain energized until the operational space temperature reaches the VAV unoccupied cooling setpoint -3°F.