Technical Guide
Operator Interfaces
26
Damper Force Modes
Damper Force Modes are available for testing or balancing the system.
These Force Modes can be accessed and programmed from either the
System Manager or the Modular Service Tool.
System Manager Instructions
To access the Damper Force Modes from the System Manager, press
the “Setpoints” key. You will then see the unit ID screen. Enter the unit
ID of the controller you wish to access and press "Enter". The following
screen will appear.
1)Change Setpoint
2)Configure Unit
3)Damper Force
ESC) Exit Menu
Press “3” on the keypad and then the "Enter" key. You will then see the
unit ID screen. Enter the unit ID of the controller you wish to access
and press "Enter". At this time the password screen will be displayed.
Enter your level 2 password. Press "Enter" and the damper force modes
screen will be displayed.
Modular Service Tool Instructions
When using the Modular Service Tool simply press the “Balance-Test”
key. You will then see the unit ID screen. Enter the unit ID of the con-
troller you wish to access and press "Enter". The following screen will
be displayed.
1)Outputs Force
2)Dampers Force
Press the “2” key to access the Damper Force Modes screen.
Damper Force Mode Screens
If the unit ID you entered is for a WMVAV controller that has VAVBOX
controllers connected to its communication loop, the Damper Force
Mode will act as a “Global” Damper Force Mode. That is, all VAVBOX
controllers on that WMVAV controllers communication loop will be
forced to the same Damper Force Mode setting. If the unit ID you en-
tered is for a VAVBOX controller, the Damper Force Mode setting will
only apply to that VAVBOX controller.
Damper Force ID 159
Enter Force Mode.: 0
0=Auto 1=Open 2=Clsd
3=Max 4=Min 5=Fixd
Set the appropriate Damper Force Mode by entering numbers 0 through
5. Following is a list of the force modes and their meaning..
0 = Auto
This is the default setpoint. With this setting
the damper will operate normally and modulate
according to the controller setpoints.
1= Open
This setting will force the dampers to their fully
open position.
2= Clsd
This setting will force the damper to it’s fully
closed position.
3= Max
This setting will force the damper to it’s Vent
Mode Maximum position setpoint. See VAVBOX
controller Setpoint Screen #4 for available
setpoint information.
4= Min
This setting will force the damper to it’s Vent
Mode Minimum position setpoint. See VAVBOX
controller Setpoint Screen #4 for available
setpoint information.
5=Fixed
This setting will force the damper to a fixed
position based on the fixed position setpoint.
See VAVBOX controller Setpoint Screen #7 for
available setpoint information.
Caution:
The Damper Force Modes should only be used by quali-
fied service personnel. Serious damage to the ductwork
could result if the dampers are all forced closed and
the HVAC unit fan is operating.
Outputs Force
Output Force settings are available for testing or troubleshooting the
system. These Force settings can only be accessed and programmed
from the Modular Service Tool, the System Manager does not allow for
programming of this function.
Caution:
The Output Force settings should only be applied by
qualified service personnel. Serious damage to the
HVAC unit could result from improper use of these
Outputs Force settings.
To access the Output Force settings simply press the “Balance-Test”
key on the Modular Service Tool. You will then see the unit ID screen.
Enter the unit ID of the WMVAV controller you wish to access and
press "Enter". The Output Force settings are only available for the
WMVAV controller. They are not supported for the VAVBOX control-
ler. If you enter a unit ID for any other type of unit except a WMVAV
controller the following screen will be displayed.
Programming The WMVAV Controller
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