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8.4 Filter cleaning valve function
The PLC output DO3 is set and sends +24 V to the
solenoid valve. The solenoid valve opens the air flow
to the pneumatic piston, which moves the lid on top of
the filter upwards letting in air with atmospheric pres-
sure to the filter top. This sudden opening of the lid
on the top lets in air with great speed which creates a
sudden pressure rise above the filters. The pressure
increase blows air through the filter bags removing
the dust from the filters.
When power to the solenoid valve disappears, the
valve closes and evacuates the pneumatic piston. The
lid falls down and closes the opening of the filter top.
If the piston does not fall down, the piston may not
evacuate properly. If the incoming compressed air is
disconnected, the piston should fall down allowing
the lid to close the filter top opening.
9 Maintenance
Maintenance work means that the equipment will
have to be opened and possibly dismantled. This may
constitute a risk and the maintenance personnel need
to know about the risks that may occur when acting
incorrectly.
WARNING! Explosion risk
Stop operation and clean the entire filter thor-
oughly from dust before any grinding, welding
or other hot works are performed on the filter
exterior or inlet.
For more information, see the Installation and
Service manual.
WARNING! Risk of personal injury
• Always use an approved breathing mask,
goggles and gloves when replacing the dust
sack and other work that involves exposure
to dust.
• The motor, fan and air duct may become very
hot during operation.
• Use ear protection when the unit is in opera-
tion and work is carried out in the vicinity of
the upper section of the dust collector.
• Always disconnect the supply voltage with
the maintenance switch before any service,
whether mechanical or electrical.
• Always lock the maintenance switch in the
off position and, if possible, secure with a
padlock.
• Always disconnect the compressed air sup-
ply before any service, whether mechanical
or electrical.
All manuals and user guides at all-guides.com
FlexPAK 800/1000 DX
9.1 Service and maintenance of ATEX
equipment
To ensure the required level of protection, ensure
that the following is performed:
• FlexPAK 800/1000 DX is regularly inspected for
• There is to be no explosive atmosphere when servi-
• Only Nederman original spare parts are to be used.
• FlexPAK 800/1000 DX is not be covered with thick
9.2 Empty the collector bin
CAUTION! Risk of equipment damage
During maintenance, it may be necessary to re-
move the acoustic enclosure over the motor
while the motor is in operation. Take care to
prevent objects from falling down into the mo-
tor cooling fan.
Contact Nederman if the frequency converter
needs service.
The unit is CE-marked. Connections to the unit,
initial start-up and maintenance are to be car-
ried out according with the product manuals.
damage or malfunction. If FlexPAK 800/1000 DX is
damaged, it is to be shut down and any explosive at-
mosphere removed.
cing or inspecting FlexPAK 800/1000 DX.
dust layers (>5 mm). This is prevented by setting up
routines for regular cleaning and including these in
the explosion protection document.
WARNING! Explosion risk
Never use the unit without a plastic bag.
WARNING! Risk of personal injury
• Ensure that there is no vacuum in the dust
separator before removing the collector bin.
• Crush hazard. Be careful when lowering and
refitting the collector bin. Use proper pro-
tective equipment.
• Wear goggles, dust mask and gloves when
emptying the collector bin.
CAUTION! Risk of equipment damage
Use only Nederman original spare parts and ac-
cessories.
The plastic bag is to be replaced when filled up
to 2/3, see Figure 11.
EN
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