190.210-IOM (SEP 21)
Page 12
LazerWeld II Plate Heat Exchanger
Operation
NOTICE
Avoid rapid temperature changes in the LZWII. With
media temperatures over 212°F (100°C), slowly in-
crease the temperature, preferably at least for 1 h.
6. When all air is expelled, close the air vent.
Figure 21: Close the air vent
7. Repeat Steps 1 to 6 for the second media.
Operating the unit
Make adjustments of flow rates slowly in order to protect
the system against sudden and extreme variations of tem-
perature and pressure.
During operation, check that media temperatures and
pressures are within the limits stated on the LZWII drawing
and identification plate.
Shutting down the unit
If several pumps are included in the system, make sure
you know which one to stop first.
1.
Slowly close the valve controlling the flow rate of the
pump you are about to stop.
Figure 22: Close the valve to pump
2. After closing the valve, stop the pump.
3. Repeat Steps 1 to 2 for the other side for the second
media.
4. If the LZWII is shut down for several days or longer,
drain it. Also drain if the process is shut down and the
ambient temperature is below the freezing temperature
of the media. Depending on the media processed, rinse
and dry the heat exchanger cassettes and connections.
Figure 23: Draining the unit
Closed
Closed
