AAON VCCX2 User Manual

85VCCX2 Controller Technical Guide
APPENDIX C: BACNET GUIDE
Analog Values
VCCX2 ANALOG VALUES
Parameter Object Description Limits
Minimum
Limits Maximum
Cool-Down Target Temperature
(See AV: 16 for Warm-Up
Target Temperature)
AV: 89 If Morning Cool-Down is congured then upon entering
occupied mode, the Cool-Down Mode activates if the return
air is above this temperature by one degree
50°F (10°C) 90°F (32.2°C)
Warm-Up Override AV: 90 Commands the unit into Morning Warm-Up Mode.
1=Command Warm-Up Mode
Cool Down Override AV: 91 Commands the unit into Morning Cool-Down Mode
1=Command Cool-Down Mode
Return Air High Limit
Protection (for Voting Units or
CV Units Only)
AV: 92 If the Return Air Temperature goes above this limit, the unit
reverts to Return Air Control. NOTE: This point only applies
when the BMS is writing a space temperature value to the
VCCX2 and that value is lost.
60 100
Return Air Low Limit Protection
(for Voting Units or CV Units
Only)
AV: 93 If the Return Air Temperature goes below this limit, the unit
reverts to Return Air Control. NOTE: This point only applies
when the BMS is writing a space temperature value to the
VCCX2 and that value is lost.
45 70
Sump Drain Override AV: 94 Setting this value to 1 turns the Sump Drain relay on. Setting
this value to 0 sets the relay operation to Auto. 0=Auto 1=On
Return Plenum Pressure
Setpoint
AV: 95 Current Return Plenum Pressure Setpoint -0.2"WG 0.2"WG
Return Plenum Pressure
Deadband
AV: 96 Value above and below the Return Plenum Pressure
Setpoint where no control change occurs
0.01"WG 0.2"WG
Dehum Lockout Setpoint AV: 97 If Outdoor Air temperature is below this setpoint,
Dehumidication Mode is locked out
-30°F (-34.4°C) 60°F (15.6°C)
Emergency Compressor
Lockout
AV: 98 This point can be used to lockout the compressors if the
BMS wants them disabled.
0 1
Supply Air Dew Point Setpoint AV: 99 When the VCCX2 is congured for DX-DOAS control it
modulates the compressors to try to maintain the Supply Air
Dew Point Setpoint during dehumidication mode.
35 80
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