VTS Medical Systems VENTUS COMPACT HP VVS021c Instructions For Use Manual page 88

8.2.7 VERIFICATION OF OPERATION DURING INITIAL START-UP
During the initial start-up, it is recommended that the steps listed below be carried out.
CHECKING THE OPERATION OF THE FANS
Check that the fans do not make excessive noise (make sure that the impeller does not rub against
the hopper and that there are no foreign bodies within the fans' operating range, which may be
caused by improper transport or storage conditions),
CHECKING THE OPERATION OF THE AIR DAMPERS ACTUATORS
•
Check
and open completely without resistance (this can be done
by observing their operation during start-up/shut-down of
the air handling unit or by pressing the button on the
actuator to release its locking mechanism and moving the
blades manually),
•
Check that they open and close in the correct direction
(dampers should open when the control panel start-up
sequence is activated and close when the control panel is
deactivated - check that they are operating in the correct
sequence at the time - the actuators are equipped with a
button to change direction in the event of wrong direction),
•
For actuators with 0-10V signal, it is necessary to check if
they operate correctly in their full range (0-10V actuators
are always used for passive bypass of recovery
and mixing chamber dampers - in case of air handling
units with a mixing chamber, additionally supply and
exhaust dampers can also be steplessly regulated by 0-
10V voltage). - this can be done by observing its operation
during the air handling unit's operation or manually feeding
the control signal to the relevant screens of the mixing or
recovery chamber controller (set D to ON and A to the
selected percentage value).
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