126
VCCX2 Controller Technical Guide
BACnet
®
Properties for the VCCX2 Controller
Parameter Object Description
Limits
PreHeat
Enable
Setpoint
AV: 29 If the Supply Fan is
energized this is the
temperature at which the
Preheat Relay will acti-
vate or the Preheat-X
Controller will activate.
Operates only in the
Occupied Mode.
-30°F
-34.4°C
70°F
21.1°C
Sensor Slide
Oset Max
Eect
AV: 30 If your 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, you can 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
Oset
AV: 32 If the Supply Air
Temperature Sensor is
reading incorrectly, you
can use this option to en-
ter 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, you
can use this option to en-
ter 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, you
can use this option to en-
ter 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 CO
2
Sensor is
reading incorrectly, you
can use this option to
enter an oset value to
adjust the Sensor’s CO
2
reading.
-500 500
Low Ambient
Protection
Setpoint
AV: 36 Temperature at which the
Low Ambient Relay will
activate in the Occupied
or Unoccupied Mode.
-30°F
-34.4°C
70°F
21.1°C
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 will
correspond to the Supply
Air Cool High Reset
Setpoint.
-30°F
-34.4°C
150°F
65.5°C
BACnet
®
Properties for the VCCX2 Controller
Parameter Object Description
Limits
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 will
correspond 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 will
correspond 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 will
correspond to the Supply
Air Heating Setpoint
(Low Reset).
0°F
-17.7°C
150°F
65.5°C
Control
Temperature
High Alarm
Oset
AV: 41 If the temperature of the
controlling sensor rises
above the Occupied
Cooling Setpoint by this
value, a High Control
Temp Alarm will occur.
Only applies if cong-
ured 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
Oset
AV: 42 If the temperature of the
controlling sensor falls
below the Occupied
Heating Setpoint by this
value, a Low Control
Temp Alarm will occur.
Only applies if cong-
ured 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 will
be locked out below this
setpoint.
-30°F
-34.4°C
100°F
37.7°C
Maximum
Main Fan
VFD in
S Z VAV
Heating
Mode
AV: 44 In Single Zone VAV
conguration, this is the
max fan speed the VFD
can modulate up to in
Heat Mode.
0 100
APPENDIX C
-
VCCX2 BACnet
®
VCCX2 BACnet
®
Parameters