Orion System VAV II Controller v.1 - Manual (Page 62)

VAV/ZONE DAMPER FORCE
VAV/CAV/MUA Operator Interface SD 62
VAV/Zone Damper Force Modes
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 Modular Service Tool.
Modular Service Tool Instructions
When using the Modular Service Tool, simply press the
TEST> key. You will then see the Unit ID Screen. Enter the unit ID of
the controller you wish to access and press . Once communi-
cation is established, the *00* message will go away. Then press
<  >
.
NOTE:
If the *00* remains, it indicates a communication failure
to the controller.
The following screen will be displayed:
Damper Force
Para Blocks
Load / Save / Copy
With the cursor on Damper Force, press to access the
Damper Force Mode Screen.
Dampers Force Mode Screen
If the unit ID you entered is for a VCM Controller that has VAV/Zone
Controllers connected to its communication loop, the Damper Force
Mode will act as a “Global” Damper Force Mode. That is, all VAV/
Zone Controllers on that VCM Controller’s communication loop will
be forced to the same Damper Force Mode setting. If the unit ID you
entered is for a VAV/Zone Controller, the Damper Force Mode setting
will only apply to that VAV/Zone Controller.
Damper Force
Enter Force Mode: 0
0=Auto 1=Open 2=Clsd
3=Max 4=Min 5=Fixed
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 its fully-
closed position.
3 = Max This setting will force the damper to its
Maximum Position Setpoint. See VAV/Zone
Controller Setpoint Screen #5 on page 57 for
complete setpoint information.
4 = Min This setting will force the damper to its Minimum
Position Setpoint. See VAV/Zone Controller
Setpoint Screen #5 on page 57 for complete
setpoint information.
5 = Fixed This setting will force the damper to a fi xed
position based on the Fixed Position Setpoint.
See VAV/Zone Controller Setpoint Screen #8
on page 58 for complete setpoint information.
CAUTION: The Damper Force Modes should only be used
by qualifi ed service personnel. Serious damage to
the ductwork could result if the dampers are all
forced closed and the HVAC unit fan is operating.