Hydraulic Connection; Electrical Connections; Electrical Voltage - Bühler technologies BNK Serie Guía Rápida Instalaciones De Refrigeración De Flujo Desviado

BNK

4.3 Hydraulic connection

Carry out the hydraulic connection as described in the at-
tached data. Connect the lines stress and vibration free, so
typically using hoses.
Be sure to use suitable lines (with regard to pressure, fluid res-
istance, 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 23/19/13 per ISO 4406.
If your hydraulic system is equipped with control or shut-off
valves, we recommend protecting the cooling system with a
pressure relief valve. No pressure relief valves are factory in-
stalled in the cooler.
The coolers are optionally available with external or internal
bypass valve in the cooling matrix.
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.
8 Bühler Technologies GmbH

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 ro-
tates counter clockwise when regarded form the motor's side!
Watch the direction arrow on the sticker.
Connect the protective earth of the motor to the protective
earth on site. Protective earth per DIN VDE 0100 must be con-
nected to the marked earth lead terminal.
5 Operation and control
WARNING
Danger due to rotating fan
Injuries to the hand may occur. Do not reach into the safety
guard!
NOTICE
The device must not be operated beyond its specifications.
NOTICE
Abrupt flow variation can lead to pressure peaks that may
damage the cooler matrix. Make sure that the specifications
are not exceeded in this case!
BX360001 ◦ 05/2019