Function

The room temperature is controlled by a room controller connected to the PICV actuator. To avoid cold air being blown into the room, when fresh air is taken from outside, a timer can be inserted to delay the startup of the fan. The control can either be modulating or On/Off depending on the system layout.

Benefits

• PICV ensures balancing of the flow and eliminates the use of both Balancing Valves and Differential Pressure Control Valves.
• Simple installation as only the PICV is required with no need of additional pressure or flow balancing valves.
• Low total pressure loss in the system due to simple design.
• The flow can be set directly on the PICV without the need of a manometer or a commissioning unit.
• The differential pressure only needs to be checked at the PICV placed at the index point, or at the end of every branch.

Considerations

• Minimum differential pressure required for the PICV must be available at design flow.
• A metering station can be installed if additional flow verification is required.