BACnet Objects

Description

Object

Object Type

Pre-loaded Value

Supply air VAV duct area

VavSuDuctArea

[DUCT AREA]

ACnfVal

0.545 ft2 (0.05 m2)

Supply air VAV duct shape

VavSuDuctShape

MCnfVal

Round

Supply air VAV dimension A

VavSuDmsnA

ACnfVal

10.0 in.

Supply air VAV dimension B

VavSuDmsnB

ACnfVal

10.0 in.

Supply air VAV flow coefficient

VavSuFlCoef

ACnfVal

0.63 (0.63)

Nominal air volume flow

AirFlNom

ACnfVal

1200 ft3/min (600 l/s)

Supply air VAV maximum air volume flow for cooling

VavSuAirFlMaxC

[CLG FLOW MAX]

ACnfVal

1200 ft3/min (600 l/s)

Supply air VAV maximum air volume flow for ventilation

VavSuAflMaxVnt

[VENT FLOW MAX]

ACnfVal

1200 ft3/m (600 l/s)

Supply air VAV ventilation request

VavSuVntReq

[VAV VENT REQ]

ACalcVal

0%

Supply air VAV cooling request

VavSuCReq

[VAV CLG REQ]

ACalcVal

0%

Supply air VAV setpoint for relative air volume flow

VavSuSpAflRel

[FLOW REL SP]

ACalcVal

0%

Supply air VAV setpoint for air volume flow

VavSuSpAirFl

[AIR VOL SP 3]

APrcVal

0 ft3/m (0 l/s)

Supply air VAV effective air velocity

VavSuAirVEff

[AIR VEL EFF]

ACalcVal

0 ft3/m (0 l/s)

Supply air VAV air volume flow deviation

VavSuAirFlDvn

[AIR VOL. DIFF]

ACalcVal

0%

Supply air VAV smoke control air volume flow setpoint

VavSuSpAflSmk

ACnfVal

800 ft3/m (400 l/s)

Supply air VAV minimum air volume flow for cooling
(can be set to zero and the ventilation flow required can be set per occupancy mode in the VAV Ventilation Control.)

VavSuAirFlMinC

[CLG FLOW MIN]

ACnfVal

0.0 ft3/min (0.0 l/s)

Supply air VAV maximum air volume flow for heating

VavSuAirFlMaxH

[HTG FLOW MAX]

ACnfVal

150 ft3/min (75 l/s)

Supply air VAV minimum air volume flow for heating
(for units with heating elements and no fan, set the Heating minimum flow to required value for heat transfer from the coils)

VavSuAirFlMinH

[HTG FLOW MIN]

ACnfVal

150 ft3/min (75 l/s)

Supply air VAV minimum air volume flow for ventilation
(can be set to zero and the ventilation configurations set per occupancy mode set in VAV Ventilation Control)

VavSuAflMinVnt

[VENT FLOW MIN]

ACnfVal

0.0 ft3/min

Parameters

Description

Parameter

Pre-loaded Value

Switch-on point for differential pressure

SwiOnPtDiffP

4%

Hysteresis for differential pressure

HysDiffP

2%

Setpoint selector for extract air VAV box

SpSelVavEx

Supply airflow

Switch-on point for air volume flow state

SwiOnAirFlSta

4%

Hysteresis for air volume flow state

HysAirFlSta

2%

Enable monitoring for fan state → Must = 0:No for parallel fan powered box applications; must = 1:Yes for series fan powered box applications.

EnMonFanSta

No

Enable monitoring for missing air volume flow

0:No
1:Yes

EnMonNoAirFl

Yes