G36ReheatTerminalBoxHeatingAirflowSetpoint

Brief Description

Terminal box with reheat when the zone state is heating following the guideline 36 recommendations

Index Description

• Section 5.6.5.3 (a, b) in ASHRAE Guideline 36-2021

Datapoints Description

• operation_mode: System operation mode

• zone_state: Zone state (heating, cooling, or deadband (not in either heating or cooling))

• v_cool_max: Zone maximum cooling airflow setpoint

• v_heat_max: Zone maximum heating airflow setpoint

• v_heat_min: Zone minimum heating airflow setpoint

• v_min: Occupied zone minimum airflow setpoint

• v_spt: Active airflow setpoint

• v_spt_tol: Airflow setpoint tolerance

• heating_loop_output: Zone heating loop signal (from 0 to 100)

• room_temp: Room temperature

• space_temp_spt: Space temperature setpoint

• ahu_sat_spt: AHU supply air temperature setpoint

• dat: Discharge air temperature

• dat_spt: Discharge air temperature setpoint

Type Verification Description

Procedure-based

Assertions Type

Pass

Assertions Description

• switch operation_mode

• case ‘occupied’

• heating_maximum = max(v_heat_min, v_min)

• heating_minimum = max(v_heat_min, v_min)

• case ‘cooldown’

• heating_maximum = v_heat_max

• heating_minimum = v_heat_min

• case ‘setup’, ‘unoccupied’

• heating_maximum = 0

• heating_minimum = 0

• case ‘warmup’, ‘setback’

• heating_maximum = v_heat_max

• heating_minimum = v_cool_max

• if 0 < heating_loop_output <= 50:

• if abs(v_spt - heating_minimum) <= tolerance and ahu_sat_spt <= dat_spt <= 11 + space_temp_spt:

• pass

• else:

• fail

• if 50 < heating_loop_output <= 100:

• if dat > room_temp + 3 and heating_minimum <= v_spt <= heating_maximum:

• pass

• else:

• untested

• end