CRYSTAL MARK SWAM-BLASTER LV-1, Руководство по эксплуатации и техническому обслуживанию

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Section IV Page 5
A. NOZZLE TIPS
Nozzle tips supplied with the unit are made of tungsten carbide or sapphire
which are highly abrasive resistant, but can crack or chip easily and must be
handled and stored with care. Nozzle tips for special applications are
available. A nozzle selection chart is in Section 6.
Nozzle tips wear through the bore enlarging the side wall and piercing through
it. A fuzzy air powder stream, with lack of definition, is a sign that the nozzle is
worn and should be replaced. Replace a nozzle by unscrewing the tip from its
connector and replace with a new one. Screw the new nozzle securely to its
connector to avoid powder leaks.
Occasionally the nozzle will clog due to an excessive flow of powder. Unclog
a nozzle as follows:
1) Remove nozzle from its connector.
2) Turn the Powder Flow Control Knob completely counter clockwise.
3) Hold the tip end of the nozzle tight against the connector.
4) Turn the unit ON and actuate the Footswitch or Flow Test Switch to
supply air to reverse flush the clogged tip. This should be done in an
exhaust chamber.
B. PINCH VALVE TROUBLESHOOTING
If a Pinch Valve fails to operate properly, the Solenoid Valve, the Pinch Valve
itself, faulty electrical connection, defective hose or the Footswitch can cause
the problem. If the unit is installed in a machine, the ON/OFF flow control may
be malfunctioning.
1) Abrasive Pinch Valve Solenoid Valve and Footswitch:
Low voltage across the solenoid coil will cause it to hum and not click.
Check the voltage across the solenoid coil. If it is low, check the power
line voltage. If line voltage is correct, check for a drop across the
footswitch contacts. If there is a drop replace the footswitch. If not,
replace the solenoid.
2) Pinch Valves:
A. If the Abrasive Pinch Valve tube stays open when the unit has air, and
its Solenoid Valve is working correctly or the Bleed Off Pinch Valve
tube stays open when the unit has air:
Remove the bottom hose connection (air in) from the pinch valve and
check if air pressure is present. It should be approximately 40 psi (276
kPa). If the pressure is incorrect, check to be sure that the air
pressure to the unit is at least 40 psi (276 kPa) and that the air lines
are clear and not pinched or kinky.