To add a predefined packaged terminal air conditioning (PTAC) system to your project

On the Ribbon > Data Managers tab, click the HVAC Systems icon.

The HVAC Manager opens.

Click the Application button to view the predefined HVAC systems available in the OpenBuildings Energy Simulator application folders.

Note: OpenBuildings Energy Simulator provides predefined HVAC systems that can be added to any project building. These predefined systems have the necessary subsystems, connections and required properties predefined, and require only a few easy steps to apply them to your project building. The following steps apply to most of the sample systems with only a few exceptions. The sample systems applicable to this procedure are:

Convective Hot Water Baseboards
Fan Coil with Electric Heat
Four-Pipe Fan Coil
Four-Pipe Fan Coil with Central Ducted DX-based DOAS with Electric Heat
Four-Pipe Fan Coil with Central Ducted DX-based DOAS with Gas Heat
Four-Pipe Fan Coil with Central Ducted DX-based DOAS with Hot Water Heat
Four-Pipe Fan Coil with Central Ducted DX-based DOAS with HX-Assisted Dehumid and Hot Water Heat
Four-Pipe Fan Coil with Central Ducted Water-Based DOAS
PTAC Air-Cooled DX with Electric Heat
PTAC Air-Cooled DX with Gas Heat
PTAC Air-Cooled DX with Hot Water Heat
PTAC Air-Cooled DX with Electric Heat and Central Ducted DOAS
PTAC Air-Cooled DX with Gas Heat and Central Ducted DOAS
PTHP Air-to-Air DX with Electric Supplemental Heat

PTHP Air-to-Air DX with Gas Supplemental Heat
PTHP Air-to-Air DX with Electric Supplemental Heat and Central Ducted DOAS
PTHP Air-to-Air DX with Gas Supplemental Heat and Central Ducted DOAS
Packaged VAV Air-Cooled DX with Gas Heat and Electric Reheat
Packaged VAV Air-Cooled DX with Hot Water Heat
Packaged VAV Air-Cooled DX with PFP Boxes and Electric Heat
VAV with PFP Boxes Water-Cooled Chiller and Electric Heat
VAV with SFP Boxes Water-Cooled Chiller and Electric Heat
VAV with SFP Boxes Water-Cooled Chiller and Hot Water Heat
VAV with Water-Cooled Chiller and Hot Water Heat
Water-Source Heat Pump
Service Water Heating, Stand-Alone Electric
Service Water Heating, Stand-Alone Natural Gas

On the HVAC Systems tab, expand the HVAC Systems category, and navigate the folder structure to HVAC Systems > Packaged Terminal Units > Packaged Terminal Air Conditioners. Select the PTAC Air-Cooled DX with Electric Heat system, and click the Copy to Project menu button.

The selected PTAC system is copied into the Project folders, and can now be incorporated into the project building.

Tip: The Comments field contains a brief description of how to apply the system.

Click the Project button.

The copied PTAC system appears in the Project HVAC Systems category inside the HVAC Systems folder.

Note: The Steadystate, heat gain and loss system is added to all projects by default. It is required for steady-state calculations.

Select the PTAC system. Then click the arrow to expand it’s contents.

This reveals the Air–Cooled DX Cooling and Electric Heat object which itself has an underlying structure of base HVAC components.

Note: The Air–Cooled DX Cooling and Electric Heat object has a different icon (a room with a red line through it) to denote that it is a room component

Select the Air–Cooled DX Cooling and Electric Heat room component.

The HVAC Manager’s Data tab displays all the base HVAC components that comprise the Air–Cooled DX Cooling and Electric Heat room component. Under each base HVAC component, is a properties panel containing EnergyPlus object properties assigned with default values.

Select the zone to be served with Air–Cooled DX Cooling and Electric Heat room components from the Zone list box.

The rooms in the selected zone appear in the Rooms available to component list box.

Select the rooms within this zone that are to be served by this HVAC system. That is, highlight the rooms in Rooms available to component, and click the right arrow button to add them to Rooms using this component.

Complete the system by clicking the OK button (bottom left corner of HVAC Manager).

The rooms selected to be served by this system each contain an Air–Cooled DX Cooling and Electric Heat room component object in their project tree hierarchy.