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OPERATING INSTRUCTIONS:
THE PRESSURE GAUGE
19. The unit is equipped with a glycerin filled pressure
gauge to read the nozzle air pressure and is
mounted on the fog generator coupling guard
between the engine and blower.
ADJUSTING THE NOZZLE AIR PRESSURE
20. Nozzle air pressure is one of the main criteria for
good particle size. Changing the speed of the
engine adjusts this pressure. The nozzle air
pressure can be adjusted by checking the pressure
gauge as the engine speed is increased or
decreased using the large silver hex nut under the
carburetor air filter. This large hex nut adjusts the
governor control and should be turned in small
amounts only after the engine has reached normal
operation temperature. NORMAL AIR PRESSURE
is 6 psi.
LOW-PRESSURE CUT-OFF
21. The Clarke Grizzly Cold Aerosol Fog Generator is
equipped with an air low-pressure cut-off switch. If, for
some reason, the nozzle air pressure drops below 1 psi,
the Flow Control will cut off. This prevents the blower from
being filled with insecticide because of insufficient air blast.
Because of this, the engine on the fog generator must be
running when setting the flow rate.
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