Supply chain setpoint for supply air temperature (SplySpTSu11)

Overview

The application function "Supply chain setpoint for supply air temperature 11" (SplySpTSu11) provides the value of the supply setpoint dependent on the air changeover condition (ChoAirModCmd). To manage the efficiency of reheating at the room segments, the reheater positions are collected and the average of the 10 highest positions will shift the supply temperature when ChoAirModCmd = Heating or Cooling.

Function

The central AHU can deliver cold or warm air for cooling or heating. The decision is done in AF SplyChovrAir11 by counting and evaluating the heating/cooling demands (ChoAirNumHDmd and ChoAirNumCDmd respectively). The evaluation determines whether ChoAirModCmd = Heating or Cooling (or Neither or Neutral). The actual state is distributed using group tag ChovrCndAir to enable the VAV control for heating or cooling.

ChoAirModCmd = Heating

The supply setpoint will be on the left side (warmer)

ChoAirModCmd = Cooling

The supply setpoint will be on the right side (cooler)

ChoAirModCmd = Neither

VAV Heating control and Cooling control in the rooms are both blocked.

The Supply setpoints are:

SpHiTSu = TSuMax
SpLoTSu = TSuMin

ChoAirModCmd = Neutral

VAV Heating control and Cooling control in the rooms are both enabled.

The Supply setpoints are:

SpHiTSu = SttValC
SpLoTSu = SttValH

Configuration

Objects

Parameters