AAON VCCX2 User Manual

81VCCX2 Controller Technical Guide
APPENDIX C: BACNET GUIDE
Analog Values
VCCX2 ANALOG VALUES
Parameter Object Description Limits
Minimum
Limits Maximum
Warm-Up Mode Supply Air
Setpoint
AV: 17 During Morning Warm-Up, the Supply Air Temperature is
controlled to this Setpoint
40°F (4.5°C) 240°F (115.5°C)
Cool-Down Mode Supply Air
Setpoint
AV: 18 During Morning Cool-Down, the Supply Air Temperature is
controlled to this Setpoint
30°F (-1.1°C) 80°F (26.6°C)
Mechanical Cooling Outdoor
Air Lockout
AV: 19 Mechanical Cooling is locked out when the Outdoor Air
Temperature is below this Setpoint
-30°F (-34.4°C) 100°F (37.7°C)
Mechanical Heating Outdoor
Air Lockout
AV: 20 Mechanical Heating is locked out when the Outdoor Air
Temperature is above this Setpoint
-30°F (-34.4°C) 150°F (65.5°C)
Low Supply Temp Cuto󰀨 Alarm AV: 21 Cooling is disabled if the Supply Air Temperature falls below
this value. See sequence for more details
0°F (-17.7°C) 100°F (37.7°C)
High Supply Temp Cuto󰀨 Alarm AV: 22 Heating is disabled if the Supply Air Temperature rises
above this value. See sequence for more details
0°F (-17.7°C) 250°F (121.1°C)
Preheater Cooling Mode
Setpoint
AV: 23 If the Preheater is enabled, and the unit is in the Cooling
Mode, this is sent to the Preheat-X Controller to control
Leaving Air Temperature
35°F (1.7°C) 90°F (32.2°C)
Preheater Venting Mode
Setpoint
AV: 24 If the Preheater is enabled, and the unit is in the Vent Mode,
this setpoint is sent to the Preheat-X Controller to control
Leaving Air Temperature
35°F (1.7°C) 90°F (32.2°C)
Preheater Heating Mode
Setpoint
AV: 25 If the Preheater is enabled, and the unit is in the Heating
Mode, this setpoint is sent to the Preheat-X Controller to
control Leaving Air Temperature
35°F (1.7°C) 90°F (32.2°C)
Outdoor Air Dewpoint Setpoint AV: 26 On an MUA unit, if the OA dewpoint rises above this setpoint,
Dehumidication is initiated
35°F (1.7°C) 80°F (26.6°C)
Economizer Enable Setpoint AV: 27 The economizer is enabled if the outdoor drybulb, dewpoint,
or wetbulb temperature falls below this setpoint
-30°F (-34.4°C) 80°F (26.6°C)
Heat Wheel Defrost Enable
Setpoint
AV: 28 The unit goes into Heat Wheel Defrost if the Outdoor Air is
below this setpoint
0°F (-17.7°C) 50°F (10°C)
PreHeat Enable Setpoint AV: 29 If the Supply Fan is energized, this is the temperature
at which the Preheat Relay activates, or the Preheat-X
activates. Operates only in the Occupied Mode.
-30°F (-34.4°C) 70°F (21.1°C)
Sensor Slide O󰀨set Max E󰀨ect AV: 30 If the space sensor has the optional slide adjustment feature,
this is the maximum amount the slide can adjust the current
heating and cooling setpoints up or down with full deection
of the slide
0°F (0°C) 10°F (5.5°C)
Space Sensor Calibration
O󰀨set
AV: 31 If the Space Temperature Sensor is reading incorrectly,
use this option to enter an o󰀨set temperature to adjust the
Sensor’s Temperature
-100°F (-55.5°C) 100°F (55.5°C)
Supply Air Sensor Calibration
O󰀨set
AV: 32 If the Supply Air Temperature Sensor is reading incorrectly,
use this option to enter an o󰀨set temperature to adjust the
Sensor’s Temperature
-100°F (-55.5°C) 100°F (55.5°C)
Return Air Sensor Calibration
O󰀨set
AV: 33 If the Return Temperature Sensor is reading incorrectly,
use this option to enter an o󰀨set temperature to adjust the
Sensor’s Temperature
-100°F (-55.5°C) 100°F (55.5°C)
Outdoor Air Sensor Calibration
O󰀨set
AV: 34 If the Outdoor Temperature Sensor is reading incorrectly,
use this option to enter an o󰀨set temperature to adjust the
Sensor’s Temperature
-100°F (-55.5°C) 100°F (55.5°C)
Carbon Dioxide Sensor
Calibration O󰀨set
AV: 35 If the CO2 Sensor is reading incorrectly, use this option to
enter an o󰀨set value to adjust the Sensor’s CO2 reading
-500 500
Low Ambient Protection
Setpoint
AV: 36 Temperature at which the Low Ambient Relay activates in
the Occupied or Unoccupied Mode
-30°F (-34.4°C) 70°F (21.1°C)
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