Installation and Maintenance Manual

52 VAV-SVX07A-EN
Tracer™ UC400 Controller Operations
6. Select Drive to Maximum Flow Position and allow sufficient time for the VAV damper to fully
open.
7. Enter the Current Discharge Airflow value in the MAX CFM field (blue) under Tracer UC400
controller Measurement on the spreadsheet.
8. Measure the actual airflow with the flow hood. (Add the totals if more than one diffuser is
present.)
9. Record them in the MAX CFM field under Flow Hood Measurement.
10. Select the Drive to Minimum Flow Position radio button, and repeat the process for
Minimum CFM, recording both the Tracer UC400 controller measurement and the flow hood
measurement on the spreadsheet.
11. The Air Flow Measurement Offset and Air Flow Gain values change dynamically as each value
is entered.
12. When the procedures for maximum and minimum flow are complete, enter the Air Flow
Measurement Offset and Air Flow Gain values in the corresponding fields on the
Commissioning tab screen of the Tracer TU service tool.
The Tracer UC400 controller reads the values and adjusts calibration to match the Maximum and
Minimum airflow values. (Retain a copy of the spreadsheet as a record of the air balancing
performed.)
Configuration Tab
Application
Equipment Type: This allows for selection between three operational programs. The three
programs are Space Temperature, Ventilation Flow, and Flow Tracking.
Fan Settings
Fan Configuration (Fan Present): This dialog box should be checked if the unit has a fan. Tracer
TU service tool automatically changes the entry to 0 (None). When the value of this field is not
None, the configuration of binary output 1 is set to Normally Open.
Fan Type: Select the type of fan used by the UCM. If you edit the unit type field, Valid Selections:
Parallel, Series.
Parallel Fan Control: This entry will determine if a parallel fan will be controlled based on zone
temperature or on flow conditions. The entry field on this line will disappear if the unit does not
have a parallel fan.
Parallel Fan Setup: If "Parallel fan control" has been edited to "Space Temperature" the fan control
offset will be entered as a temperature offset (.3°F to 8°F) which will be added to the heating
setpoint. If "Parallel fan control" has been edited to "Primary Flow" this line will be entered as a
percent (0 to 100%).
Note: See the Sequence of Operations section of this manual for details on parallel fan
operation.
Reheat Settings
Reheat: Choose between reheat options of None, Hot water or electric heat and then press the save
button.
Valve Control Type: The choices are two-position and modulating. Choose the correct valve and
press the save button.
Location of Reheat: Choices are Local and Remote. There is an additional binary value point to
select whether local or remote reheat has priority. By selecting Local the VAV unit will use local
reheat before remote reheat. If Remote is selected it does the opposite in that the VAV unit will use
remote heat before local heat.