83VCCX-IP Controller Technical Guide
APPENDIX C: BACNET GUIDE
Analog Values
VCCX-IP 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,
Dehumidication 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 Oset Max Eect 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 deection
of the slide
0°F (0°C) 10°F (5.5°C)
Space Sensor Calibration
Oset
AV: 31 If the Space Temperature Sensor is reading incorrectly,
use this option to enter an oset temperature to adjust the
Sensor’s Temperature
-100°F (-55.5°C) 100°F (55.5°C)
Supply Air Sensor Calibration
Oset
AV: 32 If the Supply Air Temperature Sensor is reading incorrectly,
use this option to enter an oset temperature to adjust the
Sensor’s Temperature
-100°F (-55.5°C) 100°F (55.5°C)
Return Air Sensor Calibration
Oset
AV: 33 If the Return Temperature Sensor is reading incorrectly,
use this option to enter an oset temperature to adjust the
Sensor’s Temperature
-100°F (-55.5°C) 100°F (55.5°C)
Outdoor Air Sensor Calibration
Oset
AV: 34 If the Outdoor Temperature Sensor is reading incorrectly,
use this option to enter an oset temperature to adjust the
Sensor’s Temperature
-100°F (-55.5°C) 100°F (55.5°C)
Carbon Dioxide Sensor
Calibration Oset
AV: 35 If the CO2 Sensor is reading incorrectly, use this option to
enter an oset 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.
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