Process Technology LUFRAN Instruction page 80

Maintenance Procedures (Continued):
Procedure M5-1 (Continued):
5) Inspect the tubing for the presence of moisture.
If no moisture is present, then proceed to step 6.
If moisture is present it may be caused by the following:
 Startup following extended shutdown: If the heater was shut down for an
extended period but was not drained properly, moisture will enter the purge
tubing. This heater should be purged with gas for 12 hours before startup is
attempted.
 Failed heating column: A hole in the heating element or a leaking purge gas
fitting will allow water into the exhaust tube.
TECHNOLOGY for possible replacement heating column.
Inspect the adjustment of the humidistat:
6) Using a screwdriver remove the four cover screws and remove the cover from each
humidistat device.
7) Turn the adjustment knob on the humidistat clockwise. The unit will enter an alarm
condition. The red light on the top of the unit will illuminate and the ALARMS MENU
on the touchscreen display will appear. Depending upon which humidistat is being
tested, the Humistat 1 or Humistat 2 alarm will flash on the display.
8) To re-adjust the humidistat, turn knob fully counter-clockwise, then 1/8 turn
clockwise.
9) Press the FAULT RESET button on the command panel of the touch screen display
to clear the fault condition.
10) Repeat steps 7-9 for the humidistat on each heating column.
If the unit fails to fault when the adjustment knob is turned fully clockwise, or the unit
fails to reset the alarm condition then the humidistat should be replaced. Proceed to
the humidistat replacement procedure on the next page.
11) Replace the black plastic enclosure cover of the humidistat.
12) Close the rear cabinet door.
M-43-01
Revision - Date: 08 – 04/06/15
- 80 -
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Lufran Single Outlet Manual