Orion System VCC-X Controller - Manual (Page 103)

VCC-X Controller Technical Guide
APPENDIX D - VCC-X BACnet ®
103
BACnet ® Properties for the VCC-X Controller
Parameter Object Description Limits
Reserved For
Bad RAT
Sensor
BI: 13 Not Currently Used.
Bad Outdoor
Air Sensor
BI: 14 Failure of the Outdoor Air
Temperature Sensor.
Bad Space
Temp Sensor
BI: 15 Failure of the Space
Temperature Sensor. If
Space is the controlling
sensor, the unit will shut
down.
Bad CO2
Sensor
BI: 16 Failure of the CO2 Sensor.
Bad Relief
Pressure
Sensor
BI:17 Alarm indicating missing
or failed Building Pressure
Sensor.
Bad Outdoor
Airfl ow
Sensor
BI: 18 An Outdoor Airfl ow
Sensor is confi gured, but
not detected.
Bad Exhaust
Airfl ow Sen-
sor
BI: 19 An Exhaust Airfl ow
Sensor is confi gured, but
not detected.
Bad Supply
Airfl ow Sen-
sor
BI: 20 A Supply Airfl ow Sensor is
confi gured, but not detected.
Bad Return
Airfl ow Sen-
sor
BI: 21 A Return Airfl ow
Sensor is confi gured, but
not detected.
Mechanical
Cooling
Alarm
BI: 22 Compressor Relays are
enabled but the Supply Air
Temperature has not fallen
5°F w/in a user-adjustable
time period. This does
not apply for Modulating
Cooling.
Mechanical
Heating Alarm
BI: 23 Heating Mode has been
initiated but the Supply Air
Temperature has not risen
5°F w/in a user-adjustable
time period. This does
not apply for Modulating
Heating.
Fan
Proving Alarm
BI: 24 Alarm that indicates an
Airfl ow failure from the
Main Fan. Heating and
Cooling will be disabled.
Dirty Filter
Alarm
BI: 25 Alarm that indicates
the fi lters are dirty.
Emergency
Shutdown
Alarm
BI: 26 Alarm that indicates
that Emergency Shutdown
has been activated. Will
shut the unit down.
BACnet ® Properties for the VCC-X Controller
Parameter Object Description Limits
Relay
Runtime
Warning
BI:27 Indicates when any of the
confi gured relays exceeds
a confi gured number of
hours of runtime. Can be
used to schedule service,
etc.
Economizer
Missing
BI:28 Title 24 operation indicates
missing economizer
feedback.
Economizer
Failure A
BI:29 Title 24 Air Temperature
Sensor Failure.
Economizer
Failure B
BI:30 Title 24 Not Economizing
when it should.
Economizer
Failure C
BI:31 Title 24 Economizing when
it should not.
Economizer
Failure D
BI:32 Title 24 Damper Not
Modulating.
Economizer
Failure E
BI:33 Title 24 Excess Outdoor Air.
High Supply
Temp Cutoff
Alarm
BI: 34 The Supply Air has risen
above the Hi SAT Cutoff
Setpoint. Heating stages
begin to deactivate and the
fan continues to run.
Low Supply
Temp Cutoff
Alarm
BI: 35 The Supply Air has fallen
below the Low SAT Cutoff
Setpoint and cooling stages
will begin to deactivate. If the
unit is in Economizer, Vent,
or Heating Mode the Supply
Fan will shut off.
High Control
Mode Alarm
BI: 36 Occurs when the
Controlling Sensor
Temperature rises above
the Cooling Mode Enable
Setpoint plus the Control
Mode High Alarm Offset.
Applies only to Space or
Return Air Temperature
controlled units.
Low Control
Mode Alarm BI: 37 Occurs when the
Controlling Sensor
Temperature falls below
the Heating Mode Enable
Setpoint minus the Control
Mode Low Alarm Offset.
Applies only to Space or
Return Air Temperature
controlled units.
VCC-X BACnet ® Parameters