VAVMinimumTurndownDuringReheatPressureReset

Brief Description

When a vav box is in reheat mode, the ratio of vav airflow rate to vav max airflow rate must not be greater than the min design turndown ratio and the pressure setpoint must remain the same

Index Description

Section 6.5.2.1 ASHRAE 90.1-2016

Datapoints Description

flag_coil_reheat: VAV box reheat coil operation status

flow_volumetric_air_vav: VAV airflow rate

flow_volumetric_air_max: VAV maximum airflow rate

ratio_turndown_min: Minimum VAV turndown ratio

pressure_duct_setpoint: Duct static pressure setpoint

Type Verification Description

Rule-based

Assertions Type

Pass

Assertions Description

if flag_coil_reheat:

if flow_volumetric_air_max == 0:

Untested

if flow_volumetric_air_max > 0.0 and flow_volumetric_air_vav / flow_volumetric_air_max > ratio_turndown_min:

if pressure_duct_setpoint_prev is None:

Untested

elif abs(pressure_duct_setpoint - pressure_duct_setpoint_prev) > 0:

Untested

else:

fail

else:

pass

else:

Untested

end