VAV - 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

Setpoints and related data

The setpoints and related data include the following items:

  • Rooftop Controller Type (CntrlType) Changeover Bypass
  • VZC Online
  • COBP Mode
  • VAV Cooling Supply Air Temp Lower Setpoint (SATLo-Sp)
    Note: This is written from Verasys
  • VAV Supply Air Temp Reset Setpoint ( SATRst-Sp)
  • Operational Space Temperature (OprST)
  • Supply Air Temperature (SAT)

Operation

The VZC sets an internal point called VZC Online on the SSE controller to Yes to indicate that a Verasys system is connected.

  • The sequence is the same as described in the VAV Sequences section with the only exception being it uses the Supply Air Temperature Setpoint from Verasys.
  • If the operational space temperature rises + 2°F or more above the VAV cooling supply air temperature reset setpoint, the VAV cooling supply air temp lower setpoint (Supply Air Temperature Setpoint in Verasys) is used for the operational VAV cooling setpoint.
  • If the operational space temperature falls below the supply air temperature reset setpoint, the supply air the VAV cooling supply air temp lower setpoint (Supply Air Temperature Setpoint in Verasys) + 5°F is used for the operational VAV cooling setpoint.