Miele PDR 910 G Plan D'installation page 9

The air required for drying is taken from the room where the dryer is installed. You must
therefore ensure that the room is sufficiently ventilated. Otherwise, there is a risk of suffo-
cation due to exhaust gases being sucked back from other technical systems or fuel-burn-
ing installations, and the drying time will be much longer.
The length of the required ductwork and the number and shape of the elbows are deter-
mined by the structural conditions on-site. In order to maximize the airflow efficiency, the
pipeline should be as short as possible and contain few or minimal elbows.
 The exhaust ducting must not be made from flammable materials.
Otherwise there is a risk of fire.
Use only non-flammable materials for the exhaust ducting. All local regulations for metal-
lic ducting must be observed. Plastic must not be used for ventilation.
In upward exhaust ducting systems, a condensate drain must be fitted to the bottom. The
condensate must be drained via a water collection tray or a floor drain positioned in an ap-
propriate location.
If air is being directed from multiple appliances into a combined line (exceptional circum-
stances), a non-return device (non-return flap) must be installed in each separate line to
prevent backflow.
To make subsequent cleaning of the pipes easier, cleaning flaps should be fitted to elbows
wherever possible.
The on-site exhaust ducting and venting to the outdoors must be regularly checked for lint
deposits and cleaned if necessary.
When connected to the vent ducting through the exhaust duct of a machine, particular care
must be taken to make sure the connection is secure and air-tight.
With complex ducting with many bends and additional components, or when several dif-
ferent machines are connected to a shared duct, it is recommended that a detailed
pipework calculation is carried out by a qualified specialist.
The vent ducting must not be channeled into a chimney or flue already in use for any gas-,
coal-, or oil-burning installation. The warm and moist exhaust air is to be conducted outside
or to a suitable venting duct over the shortest path possible.
The vent ducting must be laid so that air flow is not hindered. To achieve this, use as few
bends as possible along with short pipelines and well-made connections and transitions
checked for air-tightness. No filters or grilles may be fitted in the vent ducting.
The end of the vent ducting leading out into the open should be protected against the ele-
ments, e.g., with a downward-facing 90° bend.
 During tumble dryer operation, the room must be adequately ventilated.
The following should be avoided:
- long vent ducting
- too many tight bends or elbows
This will help to stop a reduced dryer performance and excessive time and energy re-
quirements.
Use:
- for the vent ducting: exhaust air hose* or a plastic waste water pipe (e.g., HT piping sys-
tems) with a minimum diameter of 4" (100 mm). Observe local codes.
- for the extraction ducting outside: wall pipe* or window connection*. Observe local
codes.
en - Installation notes
9