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.