The following table describes the attributes used by the Fan Determination (VAV Parallel Flow Based) module.
|
Name |
Type 1 |
Description |
Default Value |
|---|---|---|---|
|
Cooling Percent Cmd |
Current cooling command. |
0.0% |
|
|
Fan Off Threshold |
Contains the percent output required to disable the fan. This value is compared to the Cooling Percent Cmd and the Heating Percent Cmd. Both must be less than this to turn the fan off due to heating or cooling requirements. |
0.1% |
|
|
Fan On Threshold |
Contains the percent output required in order to enable the fan. This value is compared to the Cooling Percent Cmd and the Heating Percent Cmd. If either is greater than this value, the State output is on. |
5.0% |
|
|
FAN-STATE (State) |
G, V |
Contains the desired Status for the Fan. |
Off Set Name: Off/On |
|
Heating Percent Cmd |
Current heating command. |
0.0% |
|
|
HTG-PURGETIME (Heating Purge Duration) |
Specifies that when a call for heating is ended, the fan continues to operate for this period of time. Although this input can accept any value, it is connected to the timer’s duration input. The Timer clamps the duration value at its min value or its max value if the write is outside of this range. |
120 Seconds |
|
|
OCC-MINFLOW (Parallel Fan Min Occ Flow) |
Contains the occupied flow threshold. For occupied conditions, a supply flow below this value causes the fan to start. |
Display Units: l/s, cfm |
|
|
Occupancy |
Contains the effective occupancy of the Occupancy Mode Determination. |
Unoccupied Set Name: Occ Effective |
|
|
Supply Flow |
Contains the measured Supply Flow. |
0.0 l/s, 0.0 cfm |