G36FreezeProtectionStage3

Brief Description

G36 freeze protection stage 3 (highest) requirements

Index Description

  • Section 5.16.12.3. in Guideline 36-2021

Datapoints Description

  • freeze_stat: (optional, set to False if system does not have it) binary freeze-stat

  • supply_air_temp: supply air temperature

  • outdoor_damper_command: outdoor air damper

  • supply_fan_status: supply fan status (speed): [1, 0] (can be replaced by binary or numeric variables)

  • return_fan_status: (optional, set to False if system does not have it) return fan status (speed)

  • relief_fan_status: (optional, set to False if system does not have it) relief fan status (speed)

  • cooling_coil_command: cooling coil command

  • heating_coil_command: heating coil command

Assertions Description

  • if supply_air_temp < 3.3 (continuously 15 minutes) or

  • supply_air_temp < 1 (continuously 5 minutes) or

  • freeze_stat == True

  • if not (

  • outdoor_damper_command == 0 and

  • supply_fan_status == ‘off’ and

  • return_fan_status == ‘off’ and

  • relief_fan_status == ‘off’ and

  • cooling_coil_command == 100 and

  • heating_coil_command > 0

  • ):

  • fail

  • else:

  • pass

  • if never (

  • supply_air_temp < 3.3 (continuously 15 minutes) or

  • supply_air_temp < 1 (continuously 5 minutes) or

  • freeze_stat == True

  • ):

  • untested

Type Verification Description

Rule-based

Assertions Type

Pass