WDU
WOOD DRYING UNIT
5
The Logosol WDU is a drying unit intended for installation
through the wall of a drying chamber and for drying
wood that is clean from sawdust and dirt. The WDU
generates heat and sets the air in the chamber in motion
to reach a uniform drying result and minimize cracking
and movement in the wood. The machine consists of a
centrifugal fan that blows out the air through an electrical
heater, and an air inlet that mixes cold outside air with
the heated air stream. The fan runs continuously while
the WDU is switched on. The heater is controlled by
a thermostat, which measures the temperature of the
circulating air, and is adjusted from the outside of the
drying chamber. The WDU raises the temperature of the
circulating air with approx. 25 degrees C when the heater
is activated. In addition to the thermostat, the WDU has
an overheating protection that turns off the WDU if the
temperature gets too high.
MACHINE DESCRIPTION
The Logosol WDU must be installed in an insulated drying
chamber with a volume of at least 1 m
3
and max. 4 m
3
,
and with these minimum dimensions: L: 2 m, W: 0.5 m,
H: 1 m. Install the WDU through the short side of the
chamber.
• The wood that is to be dried must not be placed
closer to the WDU than 0.3 m.
• The wood should have a thickness of at least 10 mm
and be securely stacked in the chamber.
• The drying chamber should be made of a material
that that can withstand at least 80 degrees C.
• It is optional to use the air inlet of the drying unit
(A6), the purpose of which is to increase circulation in
the chamber.
• The drying chamber should always have a
thermometer that can be read from the outside and
that have a temperature sensor on the inside.
• The drying chamber should have a valve to let out
moist air.
THERMOMETER
Use an oven thermometer or the like that can withstand
temperatures above 100 degrees C. Check the thermo-
meter by immersing the sensor in boiling water. The
thermometer should then read approx. 100 degrees C.
The sensor of the thermometer should be placed on the
short side opposite to the WDU in the chamber, and at a
height of 0.5 m above the chamber floor.
DRYING CHAMBER
