Modulating HGR functionality - Johnson Controls - LIT-12011950 - Building automation software - Smart Equipment Controller - 5.0

Smart Equipment Controls Sequence of Operation Technical Bulletin
Product
Building Automation Systems > Building Automation Systems > Smart Equipment Controller
Document type
Technical Bulletin
Document number
LIT-12011950
Version
5.0
Revision date
2024-06-06
Product status
Active

Requirements

Modulating hot gas reheat is only available for the following values of Unique Equipment Identifier:

  • 2 Stage Cir1 With Single Cir2

  • Tandem Cir1 With Single Cir2

  • Inverted Single Cir1 With Single Cir2

The following conditions must be true in order for HGR to start:

  • HGR-En = Yes

  • Heating not currently active

  • Heat to Cool Delay satisfied

  • OprOcc = Occupied or OprOcc = Unoccupied and HGRUnocc-En = Yes

  • Space temp is at least 1°F higher than the effective heating setpoint

  • Have a reliable return air temp and evap coil temp

  • Compressor associated with HGR must be available (not locked out or disabled)

  • There is an active cooling demand or SatisfiedDehum = True

HGR will be active as long as one of the following conditions is true:

  • Use DFS For Dehum = Yes and DFS = Alarm

  • Use DFS For Dehum = No and OprSH > HGRHum-Sp or HGRUnoccHum-SP depending on OprOcc