AIRTERMINAL:SINGLEDUCT:VAV:NOREHEAT

Central air system terminal unit, single duct, variable volume, with no reheat coil.

Name

Availability Schedule Name

Type: list of objects (SCHEDULE:COMPACT, SCHEDULE:FILE, SCHEDULE:YEAR, SCHEDULE:CONSTANT, EXTERNALINTERFACE:SCHEDULE or EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE)
Availability schedule name for this system. Schedule value > 0 means the system is available. If this field is blank, the system is always available.

Air Outlet Node Name

Type: node

Air Inlet Node Name

Type: node

Maximum Air Flow Rate

Unit: m3/s
Minimum: 0.0

Zone Minimum Air Flow Input Method

Type: choice (Constant, FixedFlowRate or Scheduled)
Constant = Constant Minimum Air Flow Fraction (a fraction of Maximum Air Flow Rate) FixedFlowRate = Fixed Minimum Air Flow Rate (a fixed minimum air volume flow rate) Scheduled = Scheduled Minimum Air Flow Fraction (a fraction of Maximum Air Flow
Default: Constant

Constant Minimum Air Flow Fraction

Type: real number
This field is used if the field Zone Minimum Air Flow Input Method is Constant If the field Zone Minimum Air Flow Input Method is Scheduled, then this field is optional; if a value is entered, then it is used for sizing normal-action reheat coils. If both this field and the following field are entered, the larger result is used. The values for autosizing are picked up from the Sizing:Zone input fields "Cooling Minimum Air Flow per Zone Floor Area", "Cooling Minimum Air Flow", and "Cooling Minimum Air Flow Fraction". If there is no sizing calculation a default of 0.000762 m3/s-m2 (0.15 cfm/ft2) is used.
Default: autosize

Fixed Minimum Air Flow Rate

Type: real number
This field is used if the field Zone Minimum Air Flow Input Method is FixedFlowRate. If the field Zone Minimum Air Flow Input Method is Scheduled, then this field is optional; if a value is entered, then it is used for sizing normal-action reheat coils. If both this field and the previous field are entered, the larger result is used. The values for autosizing are picked up from the Sizing:Zone input fields "Cooling Minimum Air Flow per Zone Floor Area", "Cooling Minimum Air Flow", and "Cooling Minimum Air Flow Fraction". If there is no sizing calculation a default of 0.000762 m3/s-m2 (0.15 cfm/ft2) is used.
Unit: m3/s
Default: autosize

Minimum Air Flow Fraction Schedule Name

Type: list of objects (SCHEDULE:COMPACT, SCHEDULE:FILE, SCHEDULE:YEAR, SCHEDULE:CONSTANT, EXTERNALINTERFACE:SCHEDULE or EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE)
This field is used if the field Zone Minimum Air Flow Input Method is Scheduled Schedule values are fractions, 0.0 to 1.0. If the field Constant Minimum Air Flow Fraction is blank, then the average of the minimum and maximum schedule values is used for sizing normal-action reheat coils.

Design Specification Outdoor Air Object Name

Type: list of objects ( or DESIGNSPECIFICATION:OUTDOORAIR)
When the name of a DesignSpecification:OutdoorAir object is entered, the terminal unit will increase flow as needed to meet this outdoor air requirement. If Outdoor Air Flow per Person is non-zero, then the outdoor air requirement will be computed based on the current number of occupants in the zone. At no time will the supply air flow rate exceed the value for Maximum Air Flow Rate. If this field is blank, then the terminal unit will not be controlled for outdoor air flow.

Minimum Air Flow Turndown Schedule Name

Type: list of objects (SCHEDULE:COMPACT, SCHEDULE:FILE, SCHEDULE:YEAR, SCHEDULE:CONSTANT, EXTERNALINTERFACE:SCHEDULE or EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE)
This field adjusts the design minimum flow rate by multiplying it using this schedule of fraction values. This field can be used with any of the three "Zone Minimum Air Flow Input Method". Schedule values are fractions, 0.0 to 1.0. This field adjusts the minimum airflow turndown below the design minimum air flow and is intended for use with ASHRAE Standard 170. If this field is left blank, then the turndown minimum air flow fraction value is set to 1.