Roof top unit (RTU)

Description

A roof top unit (RTU) is a type of equipment having all the HVAC components needed to provide heating, ventilation, and air-conditioning in a single, self-contained unit. Heating is commonly provided by a gas-fired furnace section and cooling is provided by a vapor compression air-conditioner, with the evaporator coil located in the main airstream and remaining components (compressor, condenser, and expansion device) in an isolated section. RTUs have an air filter upstream of the heat exchangers, and commonly have an economizer that controls the amount of outdoor air that enters the unit. A supply fan distributes conditioned air to the zone(s) being served. Three RTU data sets were created including one simulation data set produced using EnergyPlus-Modelica co-simulation of a Trane® Precedent series 5-ton unit serving a single zone, one laboratory data set produced with a Trane® YCD150 12.5-ton RTU connected to a VAV distribution system with 10 zones, and one field data set with data from three separate RTUs ranging in size from 7-23.5 tons. Each data set comprises a collection of comma separated value (CSV) files with each file representing either a fault-free case or a faulty case for a single fault type at a specific severity level. A separate data inventory file documents key information for the dataset, including system type and diagram, control sequence, description of data points, and the faulty and fault-free scenarios represented in each CSV file.