Parameters

Description

Parameter

Pre-loaded Value

Enable deviation calculation

0:No
1:Yes

EnDvnCal

Yes

Enable saturation calculation

0:No
1:Yes

EnStrtnCal

Yes

Saturation level → If the percent open value for damper position (VavSuPos) is above the Saturation level (StrtnLvl) and the airflow error value (relative setpoint VavSuSpAflRel minus relative airflow VavSuSpAirFl) is greater than the Air volume flow error limit (AirFlErLm), the saturation signal VavSuAflStrtn will be True after DlyOnStrtn time. (If AirFlErLm is left at default 0%, then the airflow error value has no effect on the saturation signal.)

StrtnLvl

90%

Air volume flow error limit → In % of Nominal airflow value (AirFlNom);
If the airflow error value (relative setpoint VavSuSpAflRel minus relative airflow VavSuSpAirFl) is greater than the Air volume flow error limit (AirFlErLm) and the percent open value for damper position (VavSuPos) is greater than StrtnLvl, the saturation signal (VavSuAflStrtn) will be True after DlyOnStrtn time. (If AirFlErLm is left at default 0%, then the airflow error value has no effect on the saturation signal.)

AirFlErLm

0.0%

Switch-on delay saturation → The minimum length of time a saturation condition must remain in effect before the saturation signal VavSuAflStrtn changes to True.

DlyOnStrtn

60.0 secs

Switch-on point for air flow demand → The minimum initial airflow setpoint value above which the supply chain airflow demand object (VavSuAirDmd) switches from Off to the current plant operating mode.

SwiOnAirFlDmd

4% (of AirFlNom)

Hysteresis for air flow demand → The percent value below SwiOnAirFlDmd at which the airflow demand object (VavSuAirDmd) switches from the current plant operating mode to Off.

HysAirFlDmd

2% (of AirFlNom)

Enable relief

0:No (disables the relief function)
1:Yes (enables the relief function)

EnRlf

No

Air volume flow relief → The minimum airflow setpoint for VAV box when its air flow relief object (VavSuAirFlRlf) is set to True.

AirFlRlf

0.0 ft3/min