Connecting The Electric Contamination Indicator (Optional); Before Start-Up; Flushing The Reservoir - Bühler technologies BKF Guía Rápida

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The direction of rotation can be changed by reversing any two
phases.
Use the applicable local regulations to determine the safety
values and the cross-sections of connection leads. The motor
and, if equipped, starting devices must be connected to pro-
tective earth.
Lead fuses protect the cables in case of a short circuit, but are
not sufficient to protect the motor coils from burning due to
overload. Therefore, install an adequate motor circuit breaker
with high precision range of adjustment for thermal protec-
tion to protect the motor against overload and operation with
two phases
Adjust the motor circuit breaker according to the nominal
value specified on the type plate of the motor. Operation out-
side the specified mains voltage and frequency range limits is
prohibited.
Take appropriate measures to protect energised parts from
being touched by persons and/or interference from foreign
objects.
The operator of the equipment is responsible for ensuring
lightning protection.
3.5.1 Connecting the electric contamination indicator
(optional)
The electric contamination indicator connects via 2-pin con-
nector plug per DIN 43650, with the poles marked 1 and 2.
The top can be attached as an opener or closer by turning by
180°.
3.6 Bypass, contamination indicator
The aggregate features a bypass valve which returns part of
the oil flow to the suction line at a pressure drop > approx.
6 bar.
We recommend retrofitting the bypass unit with a mechan-
ical/electric display to switch the pump off when the filter ele-
ment reaches its contamination capacity and simultaneously
output a visual or electric signal.
BX380003 ◦ 07/2018
4 Operation and control
NOTICE
The device must not be operated beyond its specifications.

4.1 Before start-up

• Check all parts for damage. Do not put a damaged device
into operation.
• Verify the connection is correct as described in chapter
"Installation and connection".
• Verify a filter is inside the attached filter housing (the ag-
gregate is delivered without element).
• Check if all valves or other parts which must be open dur-
ing start-up were opened.
NOTICE
Before starting up a hydraulic system, any contamination
from assembly (including in the oil) must be flushed out.

4.1.1 Flushing the reservoir

On smaller oil reservoirs the oil can also be cleaned via off-line
filter during start-up.
This is done with the system off, only the off-line filter is on.
Be sure the coolant supply line is closed to prevent the oil vis-
cosity from dropping and to reduce strain on the filter ele-
ment due to cold oil.
During this process the oil should preferably at a minimum be
at room temperature. It will heat up further during the clean-
ing cycle. So long as the oil temperature does not exceed
60 °C, the process may be continued. The coolant supply line
may be opened and the oil temperature lowered via the cooler
until the desired oil purity has been reached. Unless otherwise
recommended by the system manufacturer, we recommend a
minimum purity class of 15/11 per ISO 4406.
Flushing is also required if the oil was added via the off-line
filter, since based on the mechanics of the filter only a so-
called single pass is performed.
Flushing is also recommended after changing the oil unless
the new oil used meets the specified purity class.
Bühler Technologies GmbH 11