Fan-powered VAV terminal unit

Description

Parallel fan-powered variable air volume (VAV) units (PFPU) and series fan-powered VAV units (SFPU) are terminal units in the air distribution network and provide zone temperature control. The PFPU assembly has a primary air duct and damper connected to an air handling unit (AHU), and a fan situated in a parallel duct that draws warm air from the ceiling plenum into the unit where it is mixed with cool primary air before being delivered to the zone. The PFPU also has a hydronic reheat coil and valve in the parallel duct to provide additional heating. The SFPU assembly has a primary air duct and damper connected to the AHU, and a fan situated in the primary air duct downstream of the damper. A hydronic reheat coil and valve are located downstream of the fan. Data sets for the PFPU and SFPU were created using HVACSIM+ developed by the US National Institute of Standards and Technology and each comprises a collection of comma separated value (CSV) files. Each CSV file represents either a fault-free case or a faulty case representing a single fault type at a specific severity level. A separate data inventory file documents key information for the data set, including system type and diagram, control sequence, description of data points, and the faulty and fault-free scenarios represented in each CSV file.