Airflow Sensing

Connect the hydronic coil pressure-sensing tubing

This enables the system to measure airflow volume through the AHU.

• This enhances the commissioning process, as the system can directly measure the airflow achievable through the duct system.
• It provides a longer-term tracking of air flow, which can highlight issues such as clogged filters or zone controllers that have stopped working.

• Remove the plastic barb caps on either side of the AHU’s hydronic coil.

Note

To see the black barbs that are inset visually, it might be necessary to push away some of the insulation with a small screwdriver.

• Connect the “Supply” barb of the AHU control board to the barb on the supply side of the AHU hydronic coil.
• Connect the “Return” barb of the AHU control board to the barb on the return side of the AHU hydronic coil.