Installation Guide

24
7. BALANCING THE UNIT (CONT’D)
7.5 BALANCING PROCEDURE (CONT’D)
Press on MODE key to raise
the value.
Press on TURBO key to lower
the value.
Ajust the airflow until the
reading on magnehelic gauge
reaches the desired CFM value.
MODE

TURBO

OR
Check the magnehelic
gauge along with the unit
balancing chart until the
desired airflow is reached
M
Set RECIRC speed.
Press % HUM key to
accept chosen percentage
and exit the menu OR
wait 60 seconds.
Connect the
magnehelic gauge to
Fresh airflow taps.
Press on MODE key to raise
the value.
Press on TURBO key to lower
the value.
Ajust the airflow until the
reading on magnehelic gauge
reaches the desired CFM value.
MODE

TURBO

OR

% HUM
Check the magnehelic
gauge along with the unit
balancing chart until the
desired airflow is reached
NOTE: The adjusted airflow values are stored within the unit, so, if needed, any VT9W main control can be used to adjust
the unit speeds and balance the unit again. If a power failure occurs, the unit will keep these setting values. To change the
setting values, go to step G and follow the procedure, the new values will replace the previous ones.
NOTE: According to the installation, the magnehelic gauge tubing can be
connected to exhaust OR supply air flow. The arrow on screen will
shown which airflow will have to be set.
L
Set VB60W control speed.
Plug magnehelic gauge
tubing to STALE airflow.
Plug magnehelic gauge
tubing to FRESH airflow.
The balancing procedure is completed.
Press % HUM key
to accept chosen
percentage.

% HUM
Write selected
airflow percentage
on label affixed on
the unit for future
reference
Write selected
airflow percentage
on label affixed on
the unit for future
reference