System engineers need connectors for all MEP components. Elements created without connectors cannot participate in the MEP system topology.
Connectors are logical entities that allow the system to be connected and loads to be calculated.
Choosing a Discipline for a Connector
The discipline assigned to a connector determines the types of systems with which it can interact and how it interacts with other system components.
When you add connectors, you can specify one of the following disciplines:
Duct connectors are associated with ductwork, duct fittings, objects that are part of the air handling systems.
Pipe connectors are associated with piping, pipe fittings, and other objects that are meant for transmitting fluids.
Cable tray connectors are associated with cable tray, cable tray fittings, and other components that are meant for wiring.
Connector Properties
The following tables show the different connector parameters, by property group, for each discipline.
| General | |
| Shape | Possible values are: Rectangular or Round |
| Diameter or Height / Width | Connector diameter or the height and width of the connector when the Shape is defined to be rectangular. |
| Discipline | Discipline assigned to a connector determines its properties. You can specify one of the following disciplines: Duct, Pipe, Cable tray |
| System classification |
Possible values are for piping: Exhaust Air, Supply Air, Return Air, Exhaust, Other Fitting, Global. Possible values are for HVAC: Hydronic Supply, Hydronic Return, Sanitary, Vent, Domestic Hot Water, Domestic Cold Water, Other, Fire Protection, Wet, Fire Protection Dry, Fire Protection Pre-Action, Fire Protection Other, Fitting, Global. |
| Primary connector | True or False |
| Connector data | |
|
Flow direction |
Direction of flow for a connector. Options are In, Out, or Bidirectional. |
| Connector Diameter | Connector diameter |
| Connector Inside Diameter | Inside diameter of the connector |
| Connector length | Length of pipe that is inserted into a fitting connection CEL values are based on industry standards and are configured for all pipe fittings. |
| Angle of deflection | Specifies whether to allow deflection at joints that have a tolerance angle. |
| Flow factor | Percentage of the system flow attributed to this connector. |
| Pipeflow | |
| Pressure drop | Calculated pressure drop based on the calculation method defined in sizing. |
| Fitting loss K factor | Used for calculating pressure loss. The 'K' factor of a fitting may be calculated from the 'Equivalent length' (in m or ft.) if the friction factor and the Internal diameter (in m or ft.) are known. The 'Equivalent length' and 'Internal diameter' must be in the same units to calculate the 'K' factor. |
| Connector angle | |
| Fixture units | |
| Flow configuration | Options are Calculated, Preset, or System. |
| Flow direction | Options are In, Out, or Bidirectional. |
| Fitting loss method | Specifies the loss method for the pipe connector. Options are Not Defined, K Coefficient, or Specific Loss |
| Flow | amount of air flowing |
| Static pressure | It is a measure of the potential energy of the air as it remains static or stationary within the system |
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