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5 CONSTRUCTIONAL FEATURES
5.1 Drying circuit
Version with canister in upper section
There are two air circuits inside the dryer:
•
the first is a warm-air circuit, which is sealed within the appliance
•
the second is an open cold-air circuit, which circulates air from the ambient through certain sections of the
appliance
In the sealed warm-air circuit, the air circulates inside the appliance:
The fan (1), ducts the air through a heat exchanger (5), and then to the heater unit (2). The heater unit heats
the air, which is then ducted into the drum through the perforations in the rear flange of the drum. The warm,
dry air passes through the wash load, which is agitated by the rotation of the drum, and removes the humidity
from the fabrics; the air, which is now warm and humid, passes then through the front aperture of the drum via
the fluff filter (3) and the lower filter (4), then the air is ducted by the fan (1) to the heat exchanger (5), where
the humidity is condensed. The air coming from the heat exchanger is now dry and the cycle continues as de-
scribed above.
The cold-air circuit (the air circulates in one side of the appliance) is not sealed:
the fan (6) draws in air through an air intake on the rear of the appliance, and ducts the air to the heat exchanger
(5), cooling it, after which the air is expelled on the opposite side of the heat exchanger dissipating inside the
appliance and exiting from the venting grille in the plinth.
The warm and cold air circuits cross inside the heat exchanger (5), which results in a thermal exchange which
condenses the humidity contained in the warm air.
The condensation water, which forms in the heat exchanger, is collected in a sump (7) which contains a float
(9):
•
In versions with the canister in the upper section, a pump (11) ducts the water from the sump (7) to the ca-
nister (8). When the canister is full, any overflow is collected in the canister support and returned through a
tube (not shown in the figure) into the sump (7). This causes the float (9) to rise, thus actioning the micros-
witch (10).
•
In versions with the canister in the lower section, the water flows by gravity from the sump (7) into the ca-
nister (8); when the canister is full, the water level in the sump (7) rises. This causes the float (9) to rise,
thus actioning the microswitch (10).
The electronic control system detects the closure of the microswitch, cuts off the power to the appliance and
switches on a LED warning the user that the canister is full.
The tank capacity is about 4 lt., which is sufficient for one drying cycle.
- ADL
Version with canister in lower section
20/62
599 71 49 26
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