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6.4
Pulse system
The dust collector has an air pulse cleaning system which increases the life of the filter cartridges and keep a
constant suction power.
The pressurized air supplies an air pulse which cleans the filters from the
inside. With every pulse the dirt and dust is removed from the filters after it
falls into the Longopack bags.
•
After each day relief the pressure and drain the water from
the pressure tank with the air pistol and the drain valve on
the pulse tank (4).
•
Regularly clean the 2 small filters (12) of the pressure
difference gauge. At least once per week.
If you temporarily stop the work (1/2 hour – 1 hour), or you stop
the machine for a long time:
1. Set the Dust Collector Speed (8) to LOW and make sure
that the compressor is ON (7). Pulse cleaning of the filter
system will continue and will increase the life-time of the
filter cartridges.
Remove water from the air tanks before you stop the machine for a long
time.
The pressure in the system is between 7 and 9 bar in normal mode. It is
regulated by the control valve (10).
The safety valve installed on the compressor is activated at approximately
10 bar. The safety valve (5) on the main air tank is activated at
approximately 10 bar. These provisions are to ensure that when there is a
defect, the pressure remains within safe limits.
If the safety valve (5) regularly vents air, than probably the pressure control
valve (8) must be re-adjusted!
Only a skilled Husqvarna technician performs this action, speak to Husqvarna for help.
If the pressure of 7 bar is not reached, there can be a leakage in the pneumatic circuit. It can be also dirt in
the filter of the water separator or in the air filter of the compressor.
Refer to chapters 6.3 Compressor and 6.6 Water separator for
maintenance instructions.
If the water separator and compressor are not contaminated, it is
possible that there is a leakage in the air tubing, or the pressure
control valve is damaged. In that case replace the damaged parts
or have speak to Husqvarna for servicing.
When there is a pressure but the pulse system does not oparate,
there can be a failure in the electrical system which controls the
pulsing system. Do a check of the hoses and connectors, and do a
check of the electrical wiring for damages.
Do a check the wiring and the PLC-settings.
It is recommended to speak to Husqvarna Support to prevent the operational problems.
PLC Pulse timer unit
The pulse timer unit controls the air pulse system. This unit is at delivery of the machine already programmed
with regard to optimal filter cleaning. If, however doubts arise about settings, this unit can be checked.
We advise to contact Husqvarna support in order to prevent operational problems.
After each day, let the pulse system run for 10-15 minutes with the
38
lowest speed of the fan, to clean the filter cartridges.
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