AAON VCCX2 User Manual

83VCCX2 Controller Technical Guide
APPENDIX C: BACNET GUIDE
Analog Values
VCCX2 ANALOG VALUES
Parameter Object Description Limits
Minimum
Limits Maximum
Indoor Humidity Setpoint Low
Reset Limit
AV: 53 On indoor controlled (non-MUA) units, this is the Humidity
setpoint at which the unit leaves Dehumidication. During
Coil Temp Reset, this is the lowest Space RH value that
corresponds to the High Coil Temp Setpoint.
If the VCCX2 is congured for indoor dewpoint control, this
point displays Dew Point instead of Humidity.
0 100
Indoor Humidity Setpoint High
Reset Limit
AV: 54 On indoor controlled (non-MUA) units, this is the Humidity
setpoint at which the unit initiates Dehumidication. During
Coil Temp Reset, this is the highest Space RH value that
corresponds to the Low Coil Temp Setpoint.
If the VCCX2 is congured for indoor dewpoint control, this
point displays Dew Point instead of Humidity.
0 100
Duct Static Pressure Setpoint AV: 55 Current Static Pressure Setpoint 0.1 3
Duct Static Pressure Control
Deadband
AV: 56 Value above and below the Duct Static Pressure Setpoint
where no control change occurs
0.01 0.5
Building Pressure Control
Setpoint
AV: 57 Building Pressure Setpoint or Exhaust Duct Static Pressure
Setpoint
-0.2 3
Building Pressure Control
Deadband
AV: 58 Value above and below the Building Pressure Setpoint or
the Exhaust Duct Static Pressure Setpoint where no control
change occurs
0.01 0.5
Minimum Outdoor CFM
Requirement
AV: 59 Minimum Outdoor Airow CFM Setpoint 0.10K 200K
Outdoor CFM Control
Deadband
AV: 60 Controls rate of change for damper signal. As OA CFM
moves further from setpoint within this window, the damper
makes a larger change.
10 1000
Single Zone VAV Fan Speed
Integral
AV: 61 The Integral Constant for Single Zone VAV Fan Control 0 10
Relay Run-time Hours Warning
Limit
AV: 62 If any congured relay’s run time exceeds this number of
hours of operation, a warning alarm is generated so that
periodic maintenance can be performed
0 30000
Cooling Mode Head Pressure
Setpoint
AV: 63 Head Pressure Setpoint in the Cooling Mode 250 450
Dehum Mode Head Pressure
Setpoint
AV: 64 Head Pressure Setpoint in the Dehumidication Mode 250 450
Superheat Setpoint AV: 65 Superheat Setpoint 1°F (1°C) 30°F (17°C)
Maximum Outdoor CFM
Requirement
AV: 66 Maximum Outdoor Airow CFM Setpoint in High CO2 0.10K 200K
Schedule Force AV: 67 0 = Auto (uses controller’s schedule) 1 = Forced Occupied 2
= Forced Unoccupied
0 2
HVAC Mode Override AV: 68 Overrides normal controller operation to force the unit into
this desired mode. Conguring for “Auto” restores normal
unit control of the mode of operation. 0=Auto 1=Vent 2=Cool
3=Heat 4=Vent Dehum 5=Cool Dehum 6=Heat Dehum.
0 6
Fan VFD Override AV: 69 Override to force the VFD to this percentage speed.
Conguring “Auto” restores normal unit control of the VFD
speed.
0% Auto=65535 100% Auto=65535
Objects labeled AV are read/write. The only sensor values that can be written to are AV points 72, 73, and 76 through 79.

AAON VCCX2 Specifications

General

Brand	AAON
Model	VCCX2
Category	Controller
Language	English