22
23
Figure 7.1
Frosting layers.
Fig. 6.14 present the correctly assembled pulley wheel inside the Rotary Heat Exchanger. Note the direction in which the
pulley wheel is installed. Side of the pulley wheel with the locking screw need to face in the direction of the casing. The
correct mounting distance of the pulley should be exactly 1,5mm between surface of the pulley wheel and the protruding
head of the motor holder bolt (See Fig. 6.13)
Note: usage of the thread locking fluid is recommended (single drop) on the M5 screw before locking the pulley
on the motor shaft. Such procedure will guarantee proper locking of the pulley wheel.
Figure 6.15
Proper placement of the pulley wheel on the motor shaft
Figure 6.16
Use 2.5mm Allen key to lock/unlock the pulley on the shaft. Motor is attached to the holder by the hex soc-
ket M5x20 bolts holding the motor on the holder.
7. FROST CONTROL
When outside air temperature drops below 0˚C, condensate water on the wheel matrix may start to freeze and will
change its form to became frost. Such layer is created by the excess water inside the wheel matrix channels when given
part of the wheel will stay in the zone of temperature lower than 0˚C. Figure below presents the cross-sectional view of
zones in which excess water and frosting layer occurs as soon as the supplying air is unable to receive the condensate
of the exhausted air flow (Fig.17).
