ELK
4.3 Hydraulic connection
Carry out the hydraulic connection as described in the attached data. Connect the lines stress and vibration free, so typically us-
ing hoses.
Be sure to use suitable lines (with regard to pressure, fluid resistance, environmental influences, fire) when connecting to the
hydraulic-, lubrication circuit. Tighten the hose lines with a suitable torque (see appendix).
Contaminated fluids impact the life of the cooling system, we therefore recommend a purity class of minimum 3/19/13 per
ISO 4406.
If your hydraulic system is equipped with control or shut-off valves, we recommend protecting the cooling system with a pres-
sure relief valve. No pressure relief valves are factory installed in the cooler.
When installing an air cooler in return lines, sudden changes to the flow rate can potentially cause significant pressure peaks
which even safety relief valves cannot dampen. The limits for the static pressure must not exceed max. 21 bar, or 15 bar for dy-
namic pressure peaks. Otherwise an off-line cooler must be used.
4.4 Electrical connections
CAUTION
Electrical voltage
Wrong mains voltage may damage the device.
Installation of the device shall be performed by trained staff only. Regard the voltage
given on the type plate. Make sure that the cables have sufficient strain relief.
Fusing
Fusing has to be done due to local standards!
Polarity
Take care of the directional rotation of the motor. The fan rotates counter clockwise
when regarded form the motor’s side!
Watch the direction arrow on the sticker.
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 protective 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 over-
load. Therefore, install an adequate motor circuit breaker with high precision range of adjustment for thermal protection to pro-
tect 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 outside 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.
Connect the protective earth of the motor to the protective earth on site. Protective earth per DIN VDE 0100 must be connected
to the marked earth lead terminal.
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Bühler Technologies GmbH
BE350034 ◦ 08/2022
Содержание 35ELK10040
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