Installation, Operation and Maintenance Manual
Marvel Mini
42
Subject to change without notice.
120.9-IM (1218)
U01
Space Dehumidify
Set Points
Setpoint > 50.0%
Prop Band>
4.0%
Dead Band>
2.0%
U01
Supply Cooling
Set Points
Setpoint >
55.0 °F
Prop Band>
2.0 °F
Dead Band>
0.0 °F
U01
Supply Heating
Set Points
Setpoint >
50.0 °F
Prop Band>
2.0 °F
Dead Band>
0.0 °F
The above Set Point screens are available with a wall
mount Space Temperature and Humidity Sensor Space
Heating Set Points will only appear if heaters are enabled
under Factory Menu Space Dehumidify Set Points will only
appear if a wall mount Space Humidity Sensor is installed
and Dehumidify is enabled Space Humidify Set Points
will only appear if a wall mount Space Humidity Sensor is
installed as well as the Humidifier option and Humidify is
enabled
In variable air volume applications in the past with heat pump
or cooling/heating applications, it was required to enable a
variable for Cool/Heat option for an automatic cooling and
heating unit changeover This placed the Cooling or Heating
mode independently on the Return Air Temperature to make
the determination of Cooling/Heating mode based on being
above or below the Return Air Temperature Set Point The
system then controlled the amount of stages for cooling or
heating by the Supply Cooling and Heating Set Points
This is no longer the case as now the system will work as
follows: Should the Heating Set Point remain less than
the Cooling Set point, Heating will heat the supply air
temperature back to set point and allow the individual VAV
Terminal outlet boxes with their own field supplied heaters
bring the air temperature of the tenant occupied zone back
up to the set point required Should the Supply Heating Set
Point be increased above the Supply Cooling Set Point, the
previously mention Cool/Heat enable point is automatically
enabled Once the Supply Heat Set Point is increased
above the Supply Cool Set Point, the system then looks to
Cool or Heat based on the Return Air Temperature being
above or below the Return Cool or Return Heat Set Points
Once the determination is made by the Return Temperature
and Return Temperature Cooling and Heating Set Points,
The amount of stage applied are based on the Demand
for Cooling or Heating by the Supply Cooling and Supply
Heating Set Points and Prop Band settings
If the system does not have heaters, only Supply Cooling
Set Points will appear
U01
Air Economizer
Set Points
Outdoor Temperature:
Setpoint
> 60.0 °F
Band
> 5.0 °F