VAV occupied heating - 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

This section describes the VAV Occupied Heating setpoints and related data, inputs, outputs, and operation.

Setpoints and related data

The setpoints and related data include the following items:

  • VAV occupied heating enabled (HtgOcc-En) Yes
  • VAV occupied heating setpoint (VAVHtgOcc-SP)
  • Operational space temperature (OprST)

Inputs

The inputs include the following items:

  • 24 VAC to limit switch safety terminal LIMIT, LIM2, LIM3
  • 24 VAC to gas valve verification terminal MV, GV2, GV3

Outputs

The output for VAV occupied heating is 24 VAC from H1, H2, and H3 heat outputs

Operation

The control must be in an occupied mode and not in morning warm-up mode.

If the operational space temperature drops lower than the VAV occupied heating setpoint, all cooling stages de-energize after all compressor minimum runtimes have expired and after the 2-minute cool to heat changeover delay has expired, then all heat stages energize with approximately 30 seconds of delay between stages.

Heat remains energized until the operational space temperature reaches the VAV occupied heating setpoint + 1°F.

Any time the control enters the heat mode, the VAV BOX contact closes.