Orion Control Systems AAON VCCX2 User Manual

125
VCCX2 Controller Technical Guide
APPENDIX C
-
VCCX2 BACnet
®
VCCX2 BACnet
®
Parameters
BACnet
®
Properties for the VCCX2 Controller
Parameter Object Description
Limits
Minimum
Main Fan
VFD in
Heating
Mode
AV: 46 In Single Zone VAV
conguration, this is the
fan speed at which the VFD
will start 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
will operate in the Vent
Mode in Single Zone VAV.
0 100
Maximum
Economizer
in Heating
Mode
AV: 48 Max position the
Economizer Damper can
open to in Supply Air
Tempering during Heating
Mode. Takes priority over
Max Position in High CO
2
.
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
CO
2
levels. NOTE: See
Economizer Override via
BACnet
®
section in the
Economizer area of the
Sequence of Operations for
additional information.
0 100
Maximum
Economizer
CO
2
Reset
Limit
AV: 50 The maximum value the
Economizer Minimum
Position can be reset up to
during CO
2
override.
0 100
Minimum
Carbon
Dioxide
Setpoint
AV: 51 This is the threshold
CO
2
level at which the
Economizer Min Damper
Position Setpoint will begin
to be reset higher.
0 2000
Maximum
Carbon
Dioxide
Setpoint
AV: 52 This is the CO
2
level at
which the Economizer Min
Damper Position will be
reset to the Economizer Max
Position in High CO
2
. In
between the Min and Max
CO
2
levels the Economizer
Min Damper Position will
be proportionally reset
between the congured Min
Damper Position and the
Max Position in
High CO
2
.
0 2000
BACnet
®
Properties for the VCCX2 Controller
Parameter Object Description
Limits
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.
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.
0 100
Duct Static
Pressure
Setpoint
AV: 55 Current Static
Pressure Setpoint.
.10 3.0
Duct Static
Pressure
Control
Deadband
AV: 56 Value above and below
the Duct Static Pressure
Setpoint where no control
change occurs.
.01 .5
Building
Pressure
Control
Setpoint
AV: 57 Building Pressure
Setpoint or Exhaust Duct
Static Pressure Setpoint.
-.20 3.0
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.
.01 .5
Minimum
Outdoor CFM
Requirement
AV: 59 Minimum Outdoor
Airow CFM Setpoint
.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

Orion Control Systems AAON VCCX2 Specifications

General

Brand	Orion Control Systems
Model	AAON VCCX2
Category	Controller
Language	English