Assortment / System Description

VAV application
Serial or parallel control strategy
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Y Output signal TR Room temperature
SpH Effective heating setpoint SpC Effective cooling setpoint
YH Heating valve YC Cooling valve
VavSuAirFl
MaxH
VAV maximum air volume flow
heating
VavSuAirFl
MaxC
VAV maximum air volume flow
cooling
VavSuAirFl
MinH
VAV minimum air volume flow
heating
VavSuAirFl
MinC
VAV minimum air volume flow
cooling
OfsVavSttH Offset for VAV start heating OfsVavSttC Offset for VAV start cooling
VAV volume flow
Figure: Example of a serial control strategy using modulating VAV
Y Output signal TR Room temperature
SpH Effective heating setpoint SpC Effective cooling setpoint
YH Heating valve YC Cooling valve
VavEndSpd
PrlH
VAV end speed for parallel
heating
VavEndSpd
PrlC
VAV end speed for parallel
cooling
VavSuAirFl
MinH
VAV minimum air volume flow
heating
VavSuAirFl
MinC
VAV minimum air volume flow
cooling
CoilVlVSttP
rlH
Valve position start fan heating CoilVlVSttP
rlC
Valve position start fan cooling
VAV volume flow
Figure: Example of a parallel control strategy using modulating VAV
Serial
Parallel