Distech Controls ECB-VAVS - VPACC Parameters

18 ECB-VAVS Preloaded Applications
The VPACC will measure the following fault detections:
£ Low Space Temperature
£ High Space Temperature
£ Low Discharge Temperature
£ High Discharge Temperature
£ Unstable Air Flow
£ Low Air Flow
£ High Air Flow
VPACC Parameters
£ AV80 EnDelayVPACC VPACC Enable Delay (min)
– Default value : 60 min
£ AV81 CUSUM_K_VPACC VPACC CUSUM K Param (no-unit)
– Default value : 3
£ AV82 SpaceTempStdErr VPACC Space Temperature Standard Error
– Default value : 0.4 Δ°F (0.25 Δ°K)
£ AV83 SpaceTempErrAlmSp VPACC Space Temperature Alarm
– Default value : 500 Δ°F (250 Δ°K)
£ AV84 AirFlowStdErr VPACC Air Flow Standard Error
– Default value : 10 cfm (5 L/s)
£ AV85 AirFlowErrAlmSp VPACC Flow Alarm Setpoint
– Default value : 900 cfm (450 L/s)
£ AV86 DischTempStdErr VPACC Discharge Temperature Standard Error
– Default value : 1 Δ°F (1 Δ°K)
£ AV87 DischTempErrAlmSp VPACC Discharge Temperature Alarm Setpoint
– Default value : 500 Δ°F (250 Δ°K)
£ AV88 SpaceTempPosErr VPACC Positive Space Temperature CUSUM (Δ°F) (Δ°K)
£ AV89 SpaceTempNegErr VPACC Negative Space Temperature CUSUM (Δ°F) (Δ°K)
£ AV90 AirFlowPosErr VPACC Positive Flow CUSUM (cfm) (L/s)
£ AV91 AirFlowNegErr VPACC Negative Flow CUSUM (cfm) (L/s)
£ AV92 AirFlowAbsErr VPACC Absolute Flow CUSUM (cfm) (L/s)
£ AV93 DischTempPosErr VPACC Positive Discharge Temperature CUSUM (Δ°F) (Δ°K)
£ AV94 DischTempNegErr VPACC Negative Discharge Temperature CUSUM (Δ°F) (Δ°K)
£ MSV40 VPACCStatus VPACC Status Reporting:
– Normal
– LowSpaceTemp or HighSpaceTemp
– LowDischTemp or HighDischTemp
– UnstableAirFlow or LowAirFlow or HighAirFlow
Sequence of Operation