Visatron VN2020 Instructions for use
Maintenance schedule Visatron VN2020
By conducting regular maintenance, the product will have a long service life. If the maintenance intervals are not
observed, the oil mist detector may fail prematurely. It is essential that you follow the given sequence for the work.
NOTE: All maintenance steps should be performed while engine is stopped!
What to do:
Interval:
Part kit:
Procedure
1
•M1 | Clean infrared sensors in measuring head
and replace seal on inspection cover.
•M2 | Exchange seal on connection box and
check bellows and suspension system between
measuring head and base plate for damage.
•M3 | Exchange filter in pressure regulator and
check negative pressure in measuring head.
•M4 | Clean suction/pipe system with
compressed air.
•M5 | Functional test with smoke test to be
carried out.
Every 6
months or
4 000
operating
hours.
(whatever
comes first)
Maintenance kit
for VN2020 -
small kit –Part
no.: 155003
Cleaning kit –
Part no.: 151482
Smoke test kit –
Part no.: 151780
Procedure
2
Main two-year service (2 years) by authorized and
certified Schaller personnel only!
•Service and test of complete Oil Mist Detector
installation incl. software check and upgrade if
necessary.
•Replacement of mayor part kit for VN2020.
•Service certificate to be approved by authorized
personnel!
Please contact us for authorized personnel at:
Every 24
months or
16 000
operating
hours.
(whatever
comes first)
Maintenance kit
for VN2020 –
Part no.: 155004
Cleaning kit –
Part no.: 151482
Smoke test kit –
Part no.: 151780
Procedure
3
Main two-year service (2 years) by authorized and
certified Schaller personnel only!
•Perform procedure 1 & procedure 2.
•Replace measuring head or complete oil mist
detector.
Please contact us for authorized personnel at:
Every 48
months or
32 000
operating
hours.
(whatever
comes first)
Procedure 1:
M1 | Clean infrared sensors in measuring head and replace seal on inspection cover.
1. Loosen the captive
screws on the inspection
cover.
2. Open the inspection
cover.
3. Use the cleaning fluid
and cotton sticks.
4. Clean the glass on the
transmitter diode on the
right side until it is clean.
5. And clean the diode
until the glass is clean.
6. Clean the surface and
replace the gasket for
inspection cover.
7. Close the inspection
cover and hand tight the
captive screws.
M2 | Exchange seal on connection box and check bellows and suspensions.
1. Disconnect the
measuring head from the
base plate.
2. Remove the base plate
from protection cover
base.
3. Unscrew the 4 pc.
mounting bolts on the pipe
connection box.
4. Clean the base plate for
oil and dirt.
5. Use compressed air to
the air channels into the
base plate.
6. And into the ejector
inlet and outlet chamber.
7. Clean the ejector in and
out nozzle free for oil and
dirt.
8. Replace the valve box
gasket.
9. Install the pipe
connection box.
10. Unscrew the 2 pc.
screws, and remove the
fastening ring for the
upper bellow.
11. Check the upper
bellow for damage,
replace if necessary.
12. Unscrew the 2 pc.
screws and remove the
fastening ring for the lower
bellow.
13. Check the lower
bellow damage, replace if
necessary.
14. Reinstall the fastening
ring and ensure correct
position of the bellows.
15. Check the upper and
lower suspensions for any
damage, replace if
necessary.
16. Reinstall the vibration
damping plate.
17. Ensure that position of
the flexible bellows are
correct.
18. Install the measuring
head and tighten the
captive screws with a
torque of 4,5 Nm.
M3 | Replace the filter in pressure regulator and check/adjust negative pressure in measuring
head.
1. Close the air pressure.
2. Hold the filter cage one
hand and pull the blue tab
down with your thumb.
3. Turn the filter cage
clockwise and pull out
downwards.
4. Unscrew the black
plastic disc and remove
the dirty filter.
5. Screw in the new filter
counter clockwise and
make sure that it is
aligned for installation.
6. Reinstall the filter cage.
7. Install the quick
connection.
8. Fill in slacked water in
the u-tube manometer.
9. To the middle line.
10. Install the u-tube
manometer.
11. Adjust the air pressure
to 60.00 mmWC!
12. Disconnect the u-tube
manometer and install the
plug for inspection cover.
M4 | Clean suction/pipe system with compressed air.
1. Loosen the main pipe
connection.
2. Remove the pipe form oil
mist detector.
3. Blow compressed air
into the main pipe for few
seconds so collected oil
will drain back to the
engine.
The procedure to
be done on the
right and left side!
M5 | Functional test with smoke test to be carried out.
CAUTION!
The oil mist alarm will now be triggered, showing alarm LED lighting up and the
engine will be shutting down/reducing the RPM.
1. Remove the plug in the
inspection cover.
2. Install the test plug at the
inspection cover.
3. Bend the smoke house
until tube content break.
4. Pull the hose into the test
pump.
6. When the oil mist concentration is high, the LED indicator will
increase and at 70% opacity of the set alarm threshold, the “Oil
Mist Alarm” LED turns on. At 100% opacity relative to the set
alarm threshold, the “Oil Mist Alarm” LED will start flashing. If the
opacity subsequently decreases, the alarm status is saved. The
opacity is displayed on the LED level indicator on the right. If the
top LED comes on, the opacity has reached/exceeded the oil
mist alarm threshold. The alarm condition can only be reset by
pressing the oil mist alarm reset button.
5. Pump smoke until the
oil mist alarm is realised.
7. Each extraction point is now checked individually. To do this,
hold the smoke tube directly under the suction funnel of the
individual extraction point and perform at least 3 –5 pumping
strokes. The resulting smoke should now be drawn out directly
via the suction funnels. After no more than 10 seconds, the oil
mist detector should indicate an alarm on the measuring head
display. The time to display varies depending on the engine type
and the installation kit.
