AAON VCCX2 User Manual

82VCCX2 Controller Technical Guide
APPENDIX C: BACNET GUIDE
Analog Values
VCCX2 ANALOG VALUES
Parameter Object Description Limits
Minimum
Limits Maximum
SAT Cool Setpoint Reset
Source Low Limit
AV: 37 If doing Supply Air Setpoint Reset, this is the Low Reset
Source value in Cooling that corresponds to the Supply Air
Cool High Reset Setpoint
-30°F (-34.4°C) 150°F (65.5°C)
SAT Cool Setpoint Reset
Source High Limit
AV: 38 If doing Supply Air Setpoint Reset, this is the High Reset
Source value in Cooling that corresponds to the Supply Air
Cooling Setpoint (Low Reset)
0°F (-17.7°C) 150°F (65.5°C)
SAT Heat Setpoint Reset
Source Low Limit
AV: 39 If doing Supply Air Setpoint Reset, this is the Low Reset
Source value in Heating that corresponds to the Supply Air
Heating High Reset Setpoint
-30°F (-34.4°C) 150°F (65.5°C)
SAT Heat Setpoint Reset
Source High Limit
AV: 40 If doing Supply Air Setpoint Reset, this is the High Reset
Source value in Heating that corresponds to the Supply Air
Heating Setpoint (Low Reset)
0°F (-17.7°C) 150°F (65.5°C)
Control Temperature High
Alarm O󰀨set
AV: 41 If the temperature of the controlling sensor rises above the
Occupied Cooling Setpoint by this value, a High Control
Temp Alarm occurs. Only applies if congured for Space or
Return Air Temp Control, or as Single Zone VAV.
0°F (0°C) 50°F (27.7°C)
Control Temperature Low
Alarm O󰀨set
AV: 42 If the temperature of the controlling sensor falls below the
Occupied Heating Setpoint by this value, a Low Control
Temp Alarm occurs. Only applies if congured for Space or
Return Air Temp Control, or as Single Zone VAV.
0°F (0°C) 50°F (27.7°C)
Heat Pump Compressor Heat
Lockout
AV: 43 Compressor Heat is locked out below this setpoint -30°F (-34.4°C) 100°F (37.7°C)
Maximum Main Fan VFD in SZ
VAV Heating Mode
AV: 44 In Single Zone VAV conguration, this is the max fan speed
the VFD can modulate up to in Heat Mode
0 100
Minimum Main Fan VFD in
Cooling Mode
AV: 45 In Single Zone VAV conguration, this is the fan speed at
which the VFD starts when Cooling is initiated. In a VAV
conguration this is the lowest fan speed allowed in the
Cooling Mode. In CAV and MUA congurations this should
be set to 100%.
0 100
Minimum Main Fan VFD in
Heating Mode
AV: 46 In Single Zone VAV conguration, this is the fan speed at
which the VFD starts when Heating is initiated. In a VAV
conguration this is the lowest fan speed allowed in the
Heating Mode. In CAV and MUA congurations this should
be set to 100%.
0 100
Minimum Main Fan VFD in
Vent Mode
AV: 47 Speed at which the VFD operates in the Vent Mode in
Single Zone VAV
0 100
Maximum Economizer in
Heating Mode
AV: 48 Max position the Economizer Damper opens to in Supply
Air Tempering during Heating Mode. Takes priority over Max
Position in High CO2.
0 100
Minimum Economizer Position AV: 49 The minimum position of the Outdoor Air damper in the
Occupied Mode. This can be reset upwards based on
indoor CO2 levels. NOTE: See Economizer Override via
BACnet section in the Economizer area of the Sequence of
Operations for additional information.
0 100
Maximum Economizer CO2
Reset Limit
AV: 50 The maximum value the Economizer Minimum Position can
be reset up to during CO2 override
0 100
Minimum Carbon Dioxide
Setpoint
AV: 51 This is the threshold CO2 level at which the Economizer Min
Damper Position Setpoint begins to be reset higher
0 2000
Maximum Carbon Dioxide
Setpoint
AV: 52 This is the CO2 level at which the Economizer Min Damper
Position resets to the Economizer Max Position in High CO2.
In between the Min and Max CO2 levels the Economizer
Min Damper Position is proportionally reset between the
congured Min Damper Position and the Max Position in
High CO2.
0 2000
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