Installation, Operation and Maintenance Manual
Marvel Plus
14
Subject to change without notice.
120.5-IM (1018)
Set Points (continued)
U01
Static Pressure
Set Point >
1.00iwc
Dead Band >
0.10iwc
Band >
0.15iwc
Reset to >
1.00iwc
This set point is used to adjust static pressure within the
ducting�
Set Point
for static pressure is the setting that the VFD will
change the speed for the motor/blower to try to maintain�
Dead Band
is the point where no adjustments are made to
the VFD�
Band
is the activation point plus or minus ½ of the band
setting before adjustments are made to adjust the static
pressure in the ducting�
Reset
is the actual static pressure control set point based
on the amount of static pressure reset applied� The amount
of static pressure reset applied is determined by either the
BMS Static pressure reset or by system static pressure reset
when these features are enabled�
U01
Economizer Setpt
OA SetPoint >
55.0°F
OA Band >
05.0°F
This is the Air Side Economizer set point� If the Outdoor Air
Enthalpy is less than the Return Air Enthalpy, the system will
utilize air side economizer as long as the outdoor temperature
is below the economizer set point minus the band set point�
If the outdoor air temperature falls below the OA set point
minus the OA band, the outside air dampers are modulated
open to maintain the cooling demand� If the outdoor air
temperature rises above the outdoor air temperature
set point plus O/A Band, the outside air dampers are
modulated closed or to the minimum damper position set
point� Air side economizer will be available as long as the
out- door air enthalpy is less than the return air enthalpy and
the outdoor air temperature is less than the OA set point
plus the OA Band set point� If the outdoor temperature
continues to rise above the OA set point plus the OA Band,
the controller will lock out the air side economizer and revert
to mechanical cooling�
Morning Warm-up
Warm-Up Setpt
Warmup Setpt >
60.0°F
Warmup Band >
04.0°F
Warm-Up Set Points
On Set Point: If the Return Air Temperature falls below the
Warm-up Setpt minus the band when morning warm-up
mode is enabled, the warm-up heaters are energized�
Off Set Point: As the Return Air Temperature rises above the
warm-up Setpt plus the band when morning warm-up mode
is active, the warm-up heaters are de-energized�
Morning Cool Down
U01
Cool Down Mode
SetPoint >
070.0°F
Band >
04.0°F
Cool Down Set Points
On Set Point:
If the Return Air Temperature rises above
the Cool Down Setpt plus the band when morning cool
down mode is enabled, the cool down cycle is energized�
Compressors are brought on to bring the Return Air
Temperature below the cool down set point�
