Operation; Operation Of Bearingless Fan; Operation For Atex / Iecex Application - Levitronix BFS-i04 User Manual

5 Operation

Revolving fan rotor
The fan rotor operates at high rotational speeds. It may cause injury if fingers,
hands, hair, clothes, etc. are getting in touch with the revolving fan rotor. Do not
touch the fan rotor while it is moving.
Please consider the following notes for safe and successful operation of the bearingless fan BFS-i04 to prevent
injury to personnel or damage to equipment:
•
Mounting: Only activate the bearingless fan if it is firmly mounted to a rigid non-movable structure.
•
Mechanical Protection: Only activate the bearingless fan if the rotor is mechanically protected from
reaching into it. Operating the fan without protection might lead to serious personnel injury or damage
to equipment as a result of objects being pulled into the rotor blades.

5.1 Operation of Bearingless Fan

Operation and Interfaces:
•
PLC: Control through analog and digital inputs and outputs.
•
RS485, Service Software: Control through a PC. Service Software is available from Levitronix
Technical Service Department (section 6.3), connection cable is available as accessory (section 2.1).
•
RS485, Modbus commands: Digital control through superordinate customer control unit.
•
RS485, User Panel: Control through the user panel LUI-B.1. Panel and connection cables are
available as accessories (section 2.1).
Fan control modes:
•
Closed loop speed control: Internal sensors are used to measure the actual rotational speed to
assure accurate control of the setpoint speed.
•
Closed loop process (pressure or flow) control: An external pressure or flow sensor must be
connected to the analog input of the PLC. Control parameters need to be adapted according to the
used sensor (response time, delay, scaling), the placement of the sensor (before/after, distance to fan)
and the setup of the hydraulic circuit. Contact Levitronix
(section 6.3).
Please refer to the firmware specification document for complete details about the operation of the BFS-i04
(document number for standard firmware: SW-3506-00). The document can be requested from Levitronix
Technical Service Department (section 6.3).

5.2 Operation for ATEX / IECEx Application

Specific precautions may be considered while using the bearingless fan in potentially explosive gas
atmospheres according to ATEX / IECEx category 2G/2D (Zone 1 and 21) or 3G/3D (Zone 2 and 22).
Operational Temperature 85°C T6
Maximum allowed gas temperature is 40°C / 104°F for the use in Ex
classified applications.
Do not operate the fan against closed valves
Operation against closed valves might lead to increased gas
temperature.
PL-3507-00, Rev00, DCO# 23-128
CAUTION
®
Technical Service Department for assistance
WARNING
WARNING
!
User Manual for BFS-i04
www.levitronix.com
®
®
19