G36MinOAwoEconomizer

Brief Description

G36 minimum outdoor air control when economizer is in lockout

Index Description

  • Section 5.16 in Guideline 36-2021

Datapoints Description

  • outdoor_air_temp: outdoor air temperature

  • economizer_high_limit_sp: economizer lockout high limit set point

  • outdoor_damper_command: outdoor air damper command

  • return_damper_command: return air damper command

  • outdoor_air_flow: outdoor air flow rate

  • min_oa_sp: minimum outdoor air flow rate setpoint

  • sys_mode: AHU system mode mode, enumeration of [‘occupied’, ‘unoccupied’, ‘cooldown’, ‘warmup’, ‘setback’, ‘setup’]

Assertions Description

  • if economizer_lockout(outdoor_air_temp, economizer_high_limit_sp) and sys_mode == ‘occupied’:

  • if outdoor_air_flow < MinOAsp (continuously (e.g. fall below the sp for a consecutive 1 hr)):

  • if outdoor_damper_command == 100 and return_damper_command == 0:

  • pass

  • else:

  • fail

  • elif outdoor_air_flow > MinOAsp (continuously):

  • if outdoor_damper_command == 0 and return_damper_command == 100:

  • pass

  • else:

  • fail

  • else:

  • pass (essentially untested yet)

  • else:

  • untested

Type Verification Description

Rule-based

Assertions Type

Pass