Trane VAV-UCM 4.2, Инструкция по установке и обслуживанию, Страница: 37 / 88

VAV-SVX01C-EN 37
UCM Programming and Operation
In Rover, the setpoints can be viewed at the UCM Setpoints tab and then also changed by selecting
the Configure button. Following are descriptions of each line on the UCM Setpoints tab.
Heating Setpoints
Active: The set point cannot be edited and reflects the set point currently being used for
Heating temperature control.
Occupied: Set points have a range of 30.0°F- 100.0°F (-1.1°C - 37.8°C). If a zone sensor
thumbwheel set point is not being used, this set point will be used as the UCM's active heating
set point during occupied times. The cooling set point must be greater than or equal to the
heating set point plus 2.0°F (1.1°C).
Note: Occupied cooling and heating set points must be set within the cooling set point
high limit and the heating set point low limit in order to control to the proper set
points.
Unoccupied: Set points have a range of 30.0°F - 100.0°F (-1.1°C - 37.8°C). This heating set point
is used when the UCM is unoccupied. The unoccupied heating set point must be less than or
equal to the unoccupied colling set point minus 2°F (1.1°C). The unoccupied cooling set point
must be greater than or equal to the unoccupied heating set point plus 2.0°F (1.1°C).
Low Limit: This limit applies to the occupied mode only starting in UCM version 4.1. Prior to
version 4.1, the limits would affect both the unoccupied and occupied setpoints. The occupied
heating set point is subject to high and low limits. The cooling set point high limit and the
heating set point low limit "cap" your unoccupied set points, which directly impacts energy
savings. The upper level device is responsible for preventing the resulting set points from being
crossed. This may happen if the heating set point low limit is above the cooling set point high
limit. Having the cooling set point high limit and the heating set point low limit set to the factory
defaults (cooling high limit = 102°F (38.8°C), heating low limit = 43°F (6.1°C)) should prevent
them from impacting field operation.
High Limit: This limit applies to the occupied mode only starting in UCM version 4.1. Prior to
version 4.1, the limits would affect both the unoccupied and occupied setpoints. Both limits
have a range of 30.0°F - 100.0°F (-1.1°C - 37.8°C). The set point limits will be applied to the active
heating set point by the UCM but will not restrict operator entry of set points.
Cooling Setpoints
Active: The set point cannot be edited and reflects the set point currently being used for
cooling temperature control.
Occupied: Set points have a range of 30.0°F - 100.0°F (-1.1°C - 37.8°C). If a zone sensor
thumbwheel set point is not being used, this set point will be used as the UCM's active cooling
set point during occupied times. The cooling set point must be greater than or equal to the
heating set point plus 2.0°F (1.1°C).
Note: Occupied cooling and heating set points must be set within the cooling set point
high limit and the heating set point low limit in order to control to the proper set
points.
Unoccupied: Set points have a range of 30.0°F - 100.0°F (-1.1°C - 37.8°C). This cooling set point
is used when the UCM is unoccupied. The unoccupied cooling set point must be greater than
or equal to the unoccupied heating set point plus 2.0°F (1.1°C).
Low Limit: This limit applies to the occupied mode only starting in UCM version 4.1. Prior to
version 4.1, the limits would affect both the unoccupied and occupied setpoints. Occupied
Cooling set point is subject to high and low limits. The cooling set point high limit and the
heating set point low limit "cap" your unoccupied set points, which directly impacts energy
savings. The upper level device is responsible for preventing the resulting set points from being
crossed. This may happen if the heating set point low limit is above the cooling set point high
limit. Having the cooling set point high limit and the heating set point low limit set to the factory