User Manual for BPS-200
www.levitronix.com
PL-4012-00, Rev07, DCO# 20-144
30
5.3 System Operation for ATEX / IECEx Applications
5.3.1 General Safety Requirements
Specific precautions may be considered while using the pump system in potential explosive gas
atmospheres according to
ATEX/IECEx category 3G/3D
(
Zone 2
and
22
).
The user shall prevent priming issues during normal pump operation. Precautions have to be considered
especially during installing and maintenance operations to prevent the occurrence of combustible
atmospheres.
The user shall prevent electrostatic charging of the system at cleaning processes by using dry cleaning cloth.
User shall use wet cleaning rags to avoid issues with charging during a cleaning process.
CAUTION
Precautions have to be considered to prevent priming issues during
installation operation and maintenance of the pump head / motor.
!
WARNING
Operational Temperature T5
Maximum allowed pump liquid temperature is 90°C / 194°F for the use
in Ex classified applications.
!
WARNING
Do not operate the pump against closed valves
Do not operate the pump against closed valve as this can cause heat
up of the liquid.
5.3.2 Control of Motor Casing Temperature
To avoid high motor casing temperatures and to control the temperature sensor operation the following steps
shall be considered:
For operation with the
LPC-200.2
controller the “
Digital Out 3
) shall be
monitored for warnings during operation in order to check if the communication to the temperature sensor is
established. If “
Digital Out 3
” is active (this output indicates warnings caused by various sources, inter alia
communication problems with the motor) the pump system may be checked for correct operation. The motor
temperature readings can be monitored via the
Levitronix
®
Service Software
.
For standalone operation with the
LPC-200.1
controller the display shall be checked periodically for error
(
see error
Er10 = “Communication problems EEPROM Motor
”). The motor
temperature readings can also be monitored via the display (see
Section 5.1.2
Additionally the motor casing temperature shall be periodically measured and compared to the internal motor
temperature readings. This comparison measurement checks potential drifts of the internal motor
temperature sensor. Adhesive foil made of aluminum can be used to improve the thermal junction between
motor casing and the external temperature sensor.
CAUTION
To prevent possible drifts of the motor temperature sensor the sensor shall be
checked and compared to an external measurement of the motor casing
temperature. This comparison measurement should be carried out at
maintenance procedures every 12 month. The internal temperature sensor
should not vary more than -10 °C to the external measurements. Positive drifts
are not considered as critical.
