Table 1 describes the attributes used by the VAV Single Duct Minimum Flow Determination modules.
|
Name |
Type 1 |
Description |
Default Value |
|---|---|---|---|
|
CLDWN-MINFLOW (Cooldown Min Flow) |
Contains the minimum required cooling flow when cooldown. |
100 l/s, 200 cfm |
|
|
CLG-MINFLOW (Cooling Min Flow) |
The required cooling minimum flow. |
Display Units: l/s, cfm |
|
|
CLGUNOCC-MINFLOW (Unocc Cooling Min Flow) |
Minimum required cooling flow when unoccupied. |
0 l/s, 0 cfm |
|
|
HTG-MINFLOW (Heating Min Flow) |
The required heating minimum flow. |
Display Units: l/s, cfm |
|
|
HTGUNOCC-MINFLOW (Unocc Heating Min Flow) |
Contains the minimum required heating flow when unoccupied. |
0 l/s, 0 cfm |
|
|
Min Flow Reset Type |
Defines the type of min flow reset strategy. When None is selected, the min flow values are the values at the appropriate inputs. When CO2 is selected, a proportional reset based on a CO2 setpoint and a CO2 proportional band determines the required min flow values. In both cases, the Occupancy Level and Ventilation Requirement can increase the minimum flows. |
None Set Name: None/CO2 |
|
|
MINFLOWCO2-PB (Proportional Band) |
This parameter specifies the band that the CO2 level must increase above the Setpoint to produce the largest min flow values when the Min Flow Reset Type is other than None. |
400 ppm |
|
|
MINFLOWCO2-SP (Setpoint) |
Specifies the CO2 level that the process variable must exceed to begin resetting the min flows when the Min Flow Reset Type is other than None. |
700 ppm |
|
|
OA Percent |
Percent of the supply air that is outdoor air. |
20.0% |
|
|
Occ Cooling Min Flow |
Minimum required cooling flow when occupied. |
100 l/s, 200 cfm |
|
|
Occ Heating Min Flow |
Minimum required heating flow when occupied. |
100 l/s, 200 cfm |
|
|
OCC-LEVEL (Occupancy Level) |
The number of people in the zone |
0 |
|
|
Occupancy |
Current Occupancy status of the unit. |
Occupied Set Name: Occ Effective |
|
|
Process Variable |
Contains the measured variable used to reset the minimum airflow when the Min Flow Reset Type is other than None. |
0 ppm |
|
|
Ventilation Requirement |
Outdoor airflow required per person (Occupancy Level). |
10 l/s, 20 cfm |
|
|
WarmupCooldown |
Current WarmupCooldown status of the unit. |
Normal Set Name: OST Warmup Cooldown |
|
|
WU-MINFLOW (Warmup Min Flow) |
Contains the minimum required heating flow when warmup. |
100 l/s, 200 cfm |