Trane VAV-UCM 4.2, Инструкция по установке и обслуживанию, Страница: 35 / 88

VAV-SVX01C-EN 35
UCM Programming and Operation
supply air temperature. Dashes appear if the zone sensor is not functioning when allowed to
be displayed.
Flow Control: The flow control override of the UCM. Valid values: Auto, Open, Closed, Min,
or Max.
Present Minimum: If the UCM is in pressure independent mode (using flow control), the
present minimum, expressed in the appropriate flow units, appears in the Present Minimum
field. If the UCM is in pressure dependant mode (using position control), the minimum is
expressed as percentage open.
Ventilation Ratio: The ventilation ratio equals the outside air requirement divided by the air
valve flow. Type the occupied outside air requirement and the unoccupied outside air
requirement on the
Setpoints tab.
Max Hot water Override: Used to give status if Hot water Valve is being overridden.
Heat
Type: This field shows the different types of reheat. Choices are 1) None; 2) 3 Stage Electric;
3) Electric Slow Pulse Width Modulation; 4) Proportional Hot Water with -Auxillary Heat; and 5)
3 Stage Hot Water.
Status: Shows whether the heat is enabled or disabled.
Present Value: Shows whether the heat is on or off.
Setpoints Tab
The UCM Home screens that are shown are non adjustable and are used to show values only.
Note: The Setpoints tab will be defined in programming the configuration menus.
Wireless Tab
Note: This tab displays the older style wireless not to be confused with the new wireless that is
being currently offered.
When the UCM version is 3.0 or higher, this tab displays the wireless sensor serial number
assignments. Up to five wireless sensors may be assigned to a UCM. Four sensors may be chosen
as averaging, one sensor can be chosen as backup. The backup sensors are optional. Backup
sensors for temperature and setpoint inputs only affect the UCM if all averaging sensors fail.
Backup button functions are always used. Any combination of backup strategies is valid.
For version 4.0 UCMs or higher, if the hardwired sensor is configured as not present then the
hardwired zone temperature failure flag will not be set as long as at least one wireless sensor is
transmitting a valid zone temperature. Likewise, if the hardwired sensor is configured as not
present then the hardwired setpoint sensor failure flag will not be set as long as at least one
wireless sensor is transmitting a valid setpoint.
Advanced Configuration Tab
The UCM Home Tabs (and their screens) that are shown are non adjustable and are used to show
values only. The advanced configuration tab will be defined in programming the configuration
menus