Orion-system VAV II Controller v.1 Manual do Utilizador descarregar pdf (Página 62)

VAV/ZONE DAMPER FORCE

VAV/CAV/MUA Operator Interface SD

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 <BALANCE -

TEST>

key. You will then see the Unit ID Screen. Enter the unit ID of

the controller you wish to access and press <ENTER>. 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 <ENTER> 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.

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