Orion System VCC-X Controller - Manual (Page 74)

VAV/ZONE CONFIGURATION
VCC-X Operator Interface SD 74
Setpoint Screen #8 - Damper Airfl ow Night Min
and Fan On Min
XX Box Spts IDXXXX
Damper/Airflow Spt
Night Min.: XXX %
Fan On Min.:
XXX %
The Night Min is the position the damper will move to when the
system is in Override Mode and this particular damper is not part
of the override group. This Night Min position only affects non-fan
powered boxes. The Fan On Min is the minimum damper or airfl ow
setting used to activate the parallel fan if installed. Pressure Inde-
pendent = CFM. Pressure Dependent = %.
Description Minimum Default Maximum
Night Min 0% or
0 CFM
0% or
0 CFM
100% or
9999 CFM
Fan On Min 0% or
0 CFM
25% or
250 CFM
100% or
9999 CFM
Setpoint Screen #9 - Damper Airfl ow Reheat Min
XX Box Spts IDXXXX
Damper/Airflow Spt
Reheat Min.: XXX %
The Reheat Min is the damper or airfl ow setting used during the
Space Reheat Mode of operation.
Description Minimum Default Maximum
Reheat Min 0% or
0 CFM
0% or
0 CFM
100% or
30000 CFM
Setpoint Screen #10 - Damper Airfl ow Fixed
Position
XX Box Spts IDXXXX
Damper/Airflow Spt
Fixed Pos: XXX %
Many times while troubleshooting a system, it is useful to have the
zone damper set to a specifi c damper position or airfl ow setting. This
setpoint can be used to determine where the damper/airfl ow will
remain when the VAV/Zone Controller receives a Force to Fixed
Position command.
Description Minimum Default Maximum
Fixed Pos 0% or
0 CFM
0% or
0 CFM
100% or
9999 CFM
Setpoint Screen #11 - SAT HVAC Mode
Deadband
XX Box Spts IDXXXX
SAT HVAC Mode
Deadband.: XXºF
If the supply air temperature is above the space temperature by this
amount, the VAV/Zone controller enters the Supply Air Heating
Mode. It will remain in the Supply Air Heating Mode until the supply
air drops to 2ºF above the space temperature. At that point the unit
enters the Supply Air Vent Mode and remains there until the supply
air drops this deadband below the space temperature. At that point
the VAV/Zone Controller enters the Supply Air Cooling Mode and
will remain there until the supply air temperature rises to 2ºF below
the space temperature.
Description Minimum Default Maximum
SAT HVAC Mode
Deadband
0ºF 10ºF 20ºF
Setpoint Screen #12 - Zone Alarm Offsets
XX Box Spts IDXXXX
Zone Alarm Offsets
Hi Zone......: XXºF
Lo Zone......: XXºF
The VAV/Zone Controller can be setup to generate an alarm anytime
the box goes into the Occupied Mode and the Zone Temperature ex-
ceeds the user-defi ned alarm limits for a user-defi ned period of time.
A High Temperature Alarm Setpoint is created by adding the Hi Zone
Alarm offset to the current Cooling Setpoint. The Low Temperature
Alarm Setpoint is created by adding the Lo Zone Alarm offset to the
current Heating Setpoint. If the zone temperature exceeds either of
these limits for a period defi ned by the Alarm Delay setpoint, the
controller can generate an alarm callout if all the optional hardware
components required for this to occur are installed.
Description Minimum Default Maximum
Hi Zone Alarm +1ºF +30ºF +50ºF
Lo Zone Alarm -1ºF -30ºF -50ºF
VAV/Zone Setpoint Screens