Lennox @DNOVA THS, Инструкция по установке, эксплуатации и обслуживанию, Страница: 10 / 30

8 IOM / @DNOVA_THS-0508
Freecooling duct connections (optional)
The air conditioner may be supplied with an integrated Freecooling device (optional), which uses fresh air
from outside to cool the ambient without starting up the compressor.
The device supplies the correct cooling capacity required, through a modulating motor damper.
In this case, the back side of the unit is equipped with connections collect the outside air, as follows:

Standard: double circular hole for 252mm diameter flexible ducts.

Option: single rectangular hole with flange for 789x252 mm duct
In both cases, the holes in the ceiling/wall have to be protected by rainproof grilles with prefilter to avoid
water or foreign bodies get in the conditioner.
Outside air, taken into the room by the fan, gets out through an overpressure damper, which is installed
on the ceiling/wall of the room and is protected also by external rainproof grille.
Positioning outdoor unit
The condensing unit must be positioned outside to enable its cooling.
It is connected to the air conditioner through the refrigerant lines. Keep refrigerant lines as short as
possible (do not use lines longer than 15m for R22 and 10m for R407C).