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MICRONAIR AU8000 SPRAYER
Example:
Dose: 0.5 L/tree
Time: 1.5 min/tree
Output = 0.5 = 0.33 litre/min
1.5
5. Calibrate the sprayer as described earlier.
6.2. Adjustment of Droplet Size
The size of the droplets produced by the sprayhead depends upon the rotational speed of
the atomiser and the properties of the chemical. The speed of the atomiser is controlled
by the velocity of air from the blower fan and by the angle of the fan blades.
As the mistblower is designed to run at a fixed blower speed, the speed of the atomiser
must be set by adjusting the angle of the fan blades.
All AU8000 sprayheads are supplied with the fan blades pre-adjusted to angle setting
number 2 (see Fig. 4). This setting should be satisfactory for the majority of applications.
If the droplet size is found to be too small, it can be increased by reducing the speed of the
atomiser by setting the fan blades to a coarser angle. Similarly, the droplet size can be
reduced by setting the fan blades to a finer angle and increasing the speed of the
atomiser.
The atomiser blade angle can be changed as follows. Numbers relate to Fig. 5.
1. Remove the screw securing the V-clamp ring (15) around the outer casing of the
sprayhead. Remove the front casing (2).
2. Remove the atomiser support ring (3) and atomiser from the rear casing whilst
pushing the feed hose through the grommet in the casing.
3. Remove the pipe clip (12) and atomiser feed hose (11). Slide the cone (5) off the
support ring.
4. Slacken the four atomiser clamp ring securing screws (118) just sufficiently to allow
the atomiser fan blades to be adjusted, see Fig. 6.
5. Adjust all four blades of the atomiser to a finer or coarser angle as required. See Fig.
4 for positions of setting marks. The blades should not be set finer than position 1 or
coarser than position 6. NOTE: For accurate alignment, the graduation mark and the
split line, view through the 10 mm hole in the atomiser support ring.
6. Tighten the clamp ring screws just sufficiently to trap the fan blades and prevent them
from moving. A torque of 0.3 nm (1 lb in) is sufficient. Overtightening the screws
could distort the hub or clamp ring.