Wölfle SF120 User manual

OPERATING MANUAL
for the Wölfle
Dust Filter System SF120
Wölfle Industrie- und Kraftfahrzeugteile Vertriebs GmbH
Biberacher Straße 63 ● D-88416 Ochsenhausen
Telephone: [phone] ● Fax: -119 ● Email: [e-mail]
* Issued 01/2016, subject to technical changes.

TABLE OF CONTENTS
1 Properties
Page 2
2 Technical specifications
Page 2
3 Function description
Page 3
4 Control unit
Page 3
5 Operation
Page 4
6 Filter
Page 4
7 Maintenance and filter change
Page 5
8 Replacement parts list
Page 5
9 Circuit diagram
Page 6
1 PROPERTIES
The Wölfle dust filter system is an effective and low-cost solution for retrofitting your machines such as
excavators, wheel loaders, lift trucks, telescoping loaders, and trucks for dusty activities, e.g. demolition
work, road and tunnel construction, agriculture, etc. The system removes airborne substances like dust
particles, oil vapours, soot, asbestos, spores, fungus, bacteria, and radioactive dusts via the class H13
airborne dust filter according to EN1822-2009. Our system also supports your air conditioning system
and generally ensures the preservation of your machine’s value.
2 TECHNICAL SPECIFICATIONS
Fan
Three-level high-power fan
Voltage
24 V DC or 12 V DC, depending on the version
Filter stage 1
Cyclone - pre-separator air filter
Filter stage 2
MinipleatHEPAfilter classH13asperEN1822-2009
Dimensions in mm
(WxHxD)465x490x270,hoseconnections50mm
Pressure indicator
Green LEDs 100 to 300 Pa = cabin overpressure OK
Red LEDs = cabin overpressure too high or too low
Max air quantity
120 m³/h
Max. current consumption
5 A at 24 V, 10 A at 12 V with interested filter
Housing construction
PaintedmetalhousingwithKTLanti-corrosionprotection
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3 FUNCTION DESCRIPTION
Fouled air is extracted externally via a multi-cyclone pre-separator, which removes rough particles from
the air. A fine particulate filter (class H13) filters fine airborne substances from the air, and the clean air
is blown into the cabin via an air hose and through the existing heating/air conditioning system as much
as possible.
A high-power fan produces a constant overpressure between 100 and 300 Pa in the cabin, which ideally
prevents the penetration of fouled air. In case of changes to the cabin overpressure, the machine
operator is automatically warned visually and acoustically.
The SF120 may also be equipped with a circulating air filter system and a warning lamp upon request.
This in turn increases the operating reliability of the systems, as well. The system is then designated
SFA120 and is based on the BGI581 and DGUV information 201-004.
SF120 also approximately corresponds with the requirements of EN15695-1 categories 1 to 3.
4 CONTROL UNIT
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1
2
3
4
Cabin overpressure indicator
(1) green LEDs = cabin overpressure OK 100-300 Pa
(2) red LEDs = cabin overpressure too high < 300 Pa
(3) red LEDs = cabin overpressure too low > 100 Pa
If the pressure is too low or too high, an acoustic
warning signal also sounds.
On and off switch, selecting the fan levels
(4) Rotary knob for setting the fan levels 1 to 3 and for
switching off the system = 0.

5 OPERATION
The fresh air supply system must be operating when the cabin is closed!
In other words, the dust filter system SF120 must always be in operation when the cab is closed in
order to ensure an adequate supply of fresh air to the operator. Otherwise there is a risk of oxygen
deficiency!
1. Close windows, doors and roof hatches. -> To allow overpressure in the cabin to increase, all
openings in the cabin must be closed.
2. To switch on the dust filter system SF120, turn the rotary knob (4) on the control unit clockwise
to the desired fan level. -> Overpressure increased in the cabin, which is indicated by the LEDs on
the control unit. For details, see item “4 control unit”.
3. To switch off the dust filter system SF120, turn the rotary knob (4) on the control unit
anticlockwise to level 0. -> The cabin overpressure drops rapidly and the fresh air supply is
interrupted. Observe the warning notice!
Notes:
The system is normally connected via the ignition (terminal 15). Once the system has been
switched, it is switched automatically when the motor is started to the selected fan level and
switched off when the motor is shut off.
The air conditioner may be operated as usual. See vehicle manufacturer’s operating manual.
In case of increasing pressure loss due to a fouled filter or smaller leaks in the cabin sealing,
increasing the fan level can increase the cabin pressure to reach the prescribed range of 100 –
300 Pa again.
6 FILTER
070143 Cyclone pre-separator air filter
The cyclone pre-separator air filter features a
continuous dust ejector and is therefore mainly
maintenance. In case of clogging, e.g. due to large
pieces of lint or wood fibres, please clean this
manually. Cleaning with compressed air is
possible if required.
313524 HEPA filter class H13
Filter in the basic device - This filter cannot be
cleaned! The filter material is very sensitive. Do
not reach inside the filter! If the filter is loaded
(loaded), then insert a new filter. Opening upwards
as indicated in the figure. Complete a visual
inspection at regular intervals to check if the filter
is damaged or overloaded.
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7 MAINTENANCE AND FILTER CHANGE
As described above, increasing fouling in the H 13 HEPA filter or a pressure loss, the cabin
pressure may be increased again by raising the fan level of the dust filter system. If the cabin
overpressure in the third fan level is still too low, then the cause is either a leak in the cabin or a
H 13 HEPA filter that is severely overloaded (fouled). Troubleshooting: Change the filter or
restore cabin sealing again correctly!
The class H13 HEPA filter should be restored after 500 operating hours or 6 months at the latest.
Please complete regular visual inspections of the filter.
Approach for changing H13 filter:
ATTENTION: When changing the filter, wear a suitable protective mask
and gloves if the system has been used in contaminated areas.
1. Opening the clamp fastener (1) on the filter lid.
2. Disengage the filter cover (2) and remove it.
3. Remove the loaded, fouled class H13 HEPA filter (3).
4. Clean the inside of the filter compartment as required.
5. Insert the new class H13 HEPA filter (3) with the opening facing upwards.
6. Engage the filter lid (2) in the centre of both closure hooks and close it.
7. Lock the clamping closure (1).
Check the cyclone pre-separator air filter regularly. The fan wheel on the interior must move
easily. Clogging due to lint or fibrous materials must be removed. Using compressed air for
cleaning is permissible.
Operator cabs with systems for respiratory air supply (SFA120) must be tested by a qualified
expert before the initial commissioning, after each start-up, and at least once per year according
to BGI581. The result of the test must be entered in a test log or a test report. The next testing
date is featured on a sticker in the cabin or on the basic device of the system.
8 SPARE PARTS
Name
Basic device 24 V
Basic device 12V
Operating panel
Fan 24 V (basic device)
Fan 12V (basic device)
Filter H13 basic device
Cyclone - pre-separator air filter
Air hose 50 mm
Hose clamp 50 mm
Article
590154
590153
810100-01
323047
323139
313524
070143
295729
437617
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2
1
3

9 CIRCUIT DIAGRAM
ATTENTION:
This operating manual provides information about the intended use of the product and prevention of
danger in accordance with Article 3 of the German Law on Technical Work Materials. It must be read
and observed by all persons who use, service, maintain and inspect this product.
This product can only fulfil the tasks for which it is intended if it is used, serviced, maintained and
inspected according to the specifications of Wölfle Ind. - & KFZ-Teile Vertriebs GmbH.
The guarantee provided by Wölfle Ind. - & KFZ-Teile Vertriebs GmbH for this product is rendered void if
it is not used, serviced, maintained and inspected according to the specifications of Wölfle Vertriebs
GmbH.
Prior to selection and use of the product, an evaluation must take place to determine whether the
system is suitable for the intended use.
Wölfle Ind. - & KFZ-Teile Vertriebs GmbH has no influence over the - & KFZ-Teile Vertriebs GmbH.
Therefore, our liability only extends to the consistent quality of the product.
The statements above do not change the specifications for the warranty and liability in the terms of sale
and delivery conditions of Wölfle Ind. - & KFZ-Teile Vertriebs GmbH. Please feel free to contact us for
further information.
Wölfle Industrie- und Kraftfahrzeugteile Vertriebs GmbH
Biberacher Straße 63 ● D-88416 Ochsenhausen
Telephone: [phone] ● Fax: -119 ● Email: [e-mail]
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