Process Technology LUFRAN Instruction page 69

Maintenance Procedures (Continued):
M1:
Liquid Level Sensor, Top Half Plumbing
There is one liquid level sensor located at the top of each heating column. This liquid
level sensor is a capacitive sensor that must be inspected for proper adjustment every 6
months. If the sensor is out of adjustment, it may be re-calibrated.
Procedure M1-1: Liquid Level Sensor Inspection Procedure:
1) If the unit is in LOCAL mode, press the DISABLE HEATER button on the command
panel of the OIP. If the unit is in REMOTE mode disable the heater from the
customer supplied remote controller.
energizing.
2) Continue water flow through the unit for this procedure. Allow the unit to cool to
ambient inlet temperature.
3) Open the rear cabinet door.
4) Inspect all of the plumbing connections on the top half of the unit for possible leaks.
Any leaks found must be repaired.
5) Locate the capacitance-type sensor on the (top) outlet manifold of the column
assembly. Notice the LED is red when operating properly. The liquid level sensor
should be about 3.5mm (0.125-inch) away from the outlet manifold.
M-43-01
Revision - Date: 08 – 04/06/15
This will also prevent the heaters from
Figure 42: Liquid Level Sensor
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Lufran Single Outlet Manual