Overrides; Configuration Tab - Trane Tracer Uc

Programmable bacnet controller for variable-air-volume (vav) units
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Overrides

Airflow Override: Displays the Airflow Override dialog box. The user can override the air damper
to open for a limited duration as part of a system water balancing operation. When the timed
duration expires, the water valve is released back to its normal setting.
Water Valve Override: Displays the Water Valve Override dialog box. The user can override the
water valve to open for a limited duration as part of a system water balancing operation. When the
timed duration expires, the water valve is released back to its normal setting.
Fan Override: Displays the Fan Override dialog box, which can be used to override the fan setting
to On.

Configuration Tab

Application Selection
Equipment Options
Reheat Settings
VAV-SVX07B-EN
Note: For ECM fans, the user can also select the speed of when the fan turns on.
Profile: This allows for selection between three operational programs. The three programs are
Space Temperature, Ventilation Flow, and Flow Tracking.
Box Size: Used to select a Trane F-style box size or Generic Box.
Air Damper Opens: Chose between Clockwise and Counter-Clockwise damper rotation to
open the damper.
Fan Control: Choices are None, Parallel, and Series. If Parallel or Series is selected the Fan
Setting group box will appear.
Reheat Type: Choose between reheat options of None, Hot Water, or Electric heat. If Hot Water
or Electric heat are selected the Reheat Settings group box will appear.
Parallel Fan Control: This entry will determine if a parallel fan is 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. Refer to the section,
Valve Control Type: The choices are two-position, modulating, or both.
Location of Reheat: Choices are Local and Remote. If Both is selected for Valve Control Type,
this is used to select the location of the 2-Position valve.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.
Heat Control Type (Electric): Choices are Pulse Width Modulation, Staged, and SCR. Chose
the correct electric heat type.
Number of Reheat Stages (PWM or Staged): Choose the correct number of reheat stages
(1-3)
Tracer™ UC400 Controller Operations
"Parallel Fan, " p.
54, for details on parallel fan operation.
45

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