Ultra
Assembly, installation and operating instructions
23
IMPORTANT NOTE!
Air intake crown with the unit installed on a solid ceiling
The air intake crown cannot be fitted as described when the unit is installed underneath a solid ceiling and
the pipework is visible. In this case, it may need to be adapted on site, for instance by removing partial seg-
ments of the grille.
6.3.5 Filter assembly (accessory)
Fig. 6: Positioning the air filter element on the motor guard
Fit the optional ISO Coarse 45% (G3) air filter element once all connection and installation work has been completed.
Note: Fit the air filter element
before
installing the air intake crown!
Position the ISO Coarse 45% (G3) air filter element on top of the motor guard. No fixings are needed.
CAUTION:
The ISO Coarse 45% (G3) air filter element cannot be used with closed ceiling!
6.4
Installation
Actuator with ‘First Open’ function
When delivered, the actuator is normally open in a de-energised state, thanks to the First Open function. This enables
heating mode to run even if the electric wiring is not yet completed.
When subsequently commissioned and with the application of power (for longer than 6 minutes), the First Open function
is automatically unlocked so that the actuator becomes fully operational.
0,5 mm
> 0,5 mm
< 0,5 mm
Power on
> 6 min
Power off
Fig. 7: “First Open” function
