Orion System VCC-X Controller - Manual (Page 99)

VCC-X Controller Technical Guide
APPENDIX D - VCC-X BACnet ®
99
VCC-X BACnet ® Parameters
BACnet ® Properties for the VCC-X Controller
Parameter Object Description Limits
Preheater
Reset Input
AI: 78 Current Entering Air Temp
for Preheater
Preheater Mod
Heat Signal
AI: 79 Current Modulating Heat
Signal for Preheater
Preheater
PWM Signal
AI: 80 Current PWM Output
Signal for Preheater
Occupied
Cooling
Setpoint
AV: 1 If the control temperature
rises one degree above this
setpoint, the control will
activate the cooling de-
mand. If the control sensor
is the Supply Air Sensor,
then the cooling demand is
always active.
1 110
Occupied
Heating
Setpoint
AV: 2 If the control temperature
drops one degree below
this setpoint, the control
will activate the heating
demand. If the control
sensor is the Supply Air
Sensor, then there is no
heating demand.
1 110
Hood On
Outdoor
Air Cooling
Setpoint
AV:3 This is the Cooling Mode
Enable Setpoint used only
in Hood On Mode or Space
Temperature Control of
High Percentage Outdoor
Air Units.
1 110
Hood On
Outdoor
Air Heating
Setpoint
AV:4 This is the Heating Mode
Enable Setpoint used only
in Hood On Mode or Space
Temperature Control of
High Percentage Outdoor
Air Units.
1 110
Unoccupied
Cooling Offset
AV:5 During the Unoccupied
Mode of Operation, this
Setpoint offsets the
Occupied Cooling Setpoint
up by this user-adjustable
amount. If you do not want
Cooling to operate during
the Unoccupied Mode, use
the default setting of 30°F
for this setpoint.
0 30
Unoccupied
Heating Offset
AV:6 During the Unoccupied
Mode of Operation, this
Setpoint offsets the
Occupied Heating
Setpoint down by this user-
adjustable amount. If you
do not want Heating to
operate during the
Unoccupied Mode, use the
default setting of 30°F for
this setpoint.
0 30
BACnet ® Properties for the VCC-X Controller
Parameter Object Description Limits
Mode Select
Deadband
AV:7 This value is added to and
subtracted from the HVAC
Mode Setpoints to create a
control deadband range.
0 10
Max Coil
Setpoint
Reset Limit
AV:8 This is the highest that the
Coil Temperature will be
reset to during Space
Humidity Reset of the Coil
Suction Temperature
Setpoint. If no coil
temperature reset is
required, this value should
be set the same as the Min
Coil Reset Limit.
35 70
Min Coil
Setpoint Reset
Limit
AV:9 This is the lowest that the
Coil Temperature will be
reset to during Space
Humidity Reset of the
Coil Suction Temperature
Setpoint. If no coil
temperature reset is
required, this value should
be set the same as the Max
Coil Reset Limit.
35 70
Supply Air
Cooling
Setpoint
AV:10 Supply Air Cooling
Setpoint. If Supply Air
Reset is confi gured this is
the Low SAT Cooling Reset
Value.
30 80
Supply Air
Heating
Setpoint
AV:11 Supply Air Heating
Setpoint. If Supply Air
Reset is confi gured this is
the Low SAT Heating Reset
Value.
40 240
Max SAT
Cooling
Setpoint Reset
Limit
AV: 12 If Supply Air Reset is
confi gured this is the High
SAT Cooling Reset Value.
0 100
Max SAT
Heating
Setpoint Reset
Limit
AV: 13 If Supply Air Reset is con-
fi gured this is the High SAT
Heating Reset Value.
0 250
Supply Air
Cooling
Staging
Window
AV: 14 In Cooling Mode, if the
Supply Air Temperature
drops below the Active
Supply Air Cooling Setpoint
minus this Staging Window,
a Cooling Stage will be
deactivated after its
Minimum Run Time.
1 30
Supply Air
Heating
Staging
Window
AV: 15 In Heating Mode, if the
Supply Air Temperature
rises above the Active
Supply Air Heating Setpoint
plus this Staging Window, a
Heating Stage will be
deactivated after its
Minimum Run Time.
1 50