Air Handling Unit

Central air handling unit with its main components:

• Pre-heater
• Cooling coil
• Humidifier
• Re-heater
• Heat recovery with dampers
• Single-room operation

Operating an Air Handling Unit

Scenario: The air handling unit plant has to be set to another status (On, Off, Step 1, Step 2 or Automatic) because of a maintenance interval or longer occupation time in the building.

1. In System Browser, select Graphics.

2. Click for the desired graphics page.

• The selected graphics page opens.

3. Select the operator symbol for the air handling unit.
   
   NOTE: The operation mode of a plant cannot be changed if the plant’s operation is dependent on measured temperatures.

4. Right-click and select Show Status and Commands.

5. Select the Operating Mode Manual property.
   a. In the drop-down list, select Off, On or Auto.
   b. Click Change.

• The new state is displayed under Plant Status.

6. Click to close the pane.

 

Changing an Air Handling Unit Setpoint

Scenario: Rooms are too cold. The heating setpoint needs to be set to a higher value.

NOTE:
Depending on your plant configuration, the setpoints for cooling, humidification, de-humidification or air pressure can also be changed.

1. In System Browser, select Graphics.

2. Click for the desired graphics page.

• The selected graphics page opens.

3. Select the operator symbol for the air handling unit.
   
   NOTE: The operation settings of a plant cannot be changed if the plant’s operation is dependent on measured temperatures.

4. Right-click and select Show Status and Commands.

5. Select the Setpoint for Heating property.
   a. Enter the new value.
   b. Click Change.

• The new setpoint displays.

6. Click to close the pane.