Intellispeed™ fixed variable fan control - 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:

  • Fan control type = fixed variable (FanCtl-Type)
  • Occupied: no heat or cool % command (FanOnly-%Cmd)
  • Occupied: one stage of cool % command (1ClgStg-%Cmd)
  • Occupied: two stage of cool % command (2ClgStg-%Cmd)
  • Occupied: three stage of cool % command (3ClgStg-%Cmd)
  • Occupied: four stage of cool % command (4ClgStg-%Cmd)
  • Occupied: one stage of heat % command (1HtgStg-%Cmd)
  • Occupied: two stage of heat % command (2HtgStg-%Cmd)
  • Occupied: three stage of heat % command (3HtgStg-%Cmd)
Note: The fixed variable economizer minimum position sequence uses the same parameters. See Fixed variable (IntelliSpeed), for additional information.

Inputs

No inputs are related to fixed variable fan control (Intellispeed).

Outputs

The outputs include the following items:

  • 24 VAC from FAN
  • 2 to 10 VDC from VFD

Operation

Fan speed is determined by the status of FAN, cooling, and heating outputs. For example, with the fan running and no cooling outputs, the FAN speed is Occupied: no heat or cool % command. Another example includes one stage of cooling operating the FAN speed is Occupied: one stage of cool % command.

In the unoccupied mode the FAN speed control is the same as in the occupied mode.
Note: When electric heat is active, the supply fan operates at 100%.