How to Change Imperial to SI units in VAV Controller in Classic Network System.

[Product_Support]

Issue

Procedure to Change Imperial to SI units in VAV Controller in Classic Network System.

Environment

• Xenta 102-AX VAV Controller
• TAC Vista (Classic)

Cause

In classic Network System, when trying to change the Xenta 102-AX VAV units from Imperial to SI, it is not changing.

Resolution

It is possible to change the Xenta 102-AX VAV units from Imperial to SI, in LNS System using the plug-in,

But in Classic Network system, it requires some system settings to take the effect.

Follow the below steps to change the Xenta 102-AX VAV units from Imperial to SI:

Make sure that these setting are checked in the Administrator account. I some cases there may be two or more administrator accounts that require these setting checked

1. Go to Control Panel -> Open "Regional and Language Options" -> in Standards and formats, change from English (United States) to English (United Kingdom).
   
   Note:
   - If the units are required in Fahrenheit set the English language to United States.
   - If the units are required in Degree Celsius set the English language to United Kingdom.
    
2. Change the Location to your local region.
    
3. Go to Advanced TAB -> change from English (United States) to English (United Kingdom).
   
   Note:
   - If the units are required in Fahrenheit set the English language to United States.
   - If the units are required in Degree Celsius set the English language to United Kingdom.
    
4. Click on "Apply all Settings to the current user account and to the default user profile".
    
5. Click on "Apply" and then click on "OK".
    
6. Re-Start the Computer.
    
7. After the computer has restarted, open the TAC Vista Server and Work Station. Then Right Click on "VAV Controller", go to its properties, and reload the XIF file, then press "OK".
    
8. Commission and Download.
    
9. It should now be possible to change the units of the device.