Orion System SA Controller - Manual (Page 49)

SA Controller Operator Interface
Programming
49
VAV/Zone Controller Setpoint Screens
Setpoint Screen #6 - Damper Airfl ow Cool/
Heat Minimum
XX Box Spts IDXXXX
Damper/Airflow Spt
Cool Min.: XXX %
Heat Min.: XXX %
During Supply Air Cooling Mode, if the space being served by this
damper is satisfi ed and has no cooling demand, the damper will close to
this Cool Min setting. This provides a minimum amount of airfl ow into
the space for ventilation, even if the space does not require additional
cooling. During Supply Air Heating Mode, if the space being served
by this damper is satisfi ed and has no heating demand, the damper will
close to this Heat Min setting. This provides a minimum amount of
airfl ow into the space for ventilation, even if the space does not require
additional heating.
Description Minimum Default Maximum
Cool Min 0% or
0 CFM
10% or
1000 CFM
100% or
30000 CFM
Heat Min 0% or
0 CFM
10% or
100 CFM
100% or
30000 CFM
Setpoint Screen #7 - 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 sys-
tem 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 Independent = 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 #8 - 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 #9 - 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 #10 - 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 en-
ters 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