Finish Thompson LS-55IIE - Manual (Page 11)

10
Instrumentation and Controls
LS SERIES STILLS (ALL MODELS):
STOP/START - An illuminated push-button switch. Pull to activate the Still, push to terminate all functions. A
green light indicates that the Still is operating within the processing cycle.
IMPORTANT: The STOP/START push-button switch must be left pushed in the STOP position for a minimum of
five (5) seconds before pulling on. This allows the controls to electrically reset themselves. Failure to do so will
prevent the heater from operating.
CYCLE TEMP - Controls the temperature that will be maintained in the area of the heater. Turn the dial to set the
temperature at least 50° to 100°F above the boiling point of the solvent being processed.
IMPORTANT: Determine the solvent boiling point under vacuum, if applicable. See Solvent Boiling Points
Under Vacuum for additional information.
LS SERIES “SYSTEM II” STILLS:
CYCLE TIMER - This setting determines the total duration of the cycle. Turn the dial to the desired amount of
time, depending on your particular solvent. If unsure as to the time required for your solvent, start at 8 hours, then
observe the results. Adjust up or down, as necessary until the optimum time is determined.
IMPORTANT: The minimum setting (full counter-clockwise) allows the still to process for 10 minutes, then
activates the cool-down mode for 1 hour. The maximum setting (full clockwise) allows the still to process for 16
hours, then activates the cool-down mode for 1 hour. The accuracy of the timer is approximately ±15%.
COOLING WATER - White indicator light. When illuminated, this light indicates that the cooling water supply to
the condenser is flowing at or above the proper rate. Adjust your incoming water flow until the light stays on
without flickering. If the white light does not illuminate, this may indicate that the water flow to the unit is
inadequate, or the condenser cooling system or flow switch requires maintenance.
HEAT - Amber indicator light. This light indicates the heater element is ON. During normal operation, this light
will remain illuminated for approximately the first hour of the process, then will cycle ON and OFF to indicate that
the heating system is cycling to maintain the temperature set on the Cycle Temp dial.
VAPOR TEMP - Indicates the temperature of the solvent vapor before being condensed into liquid. This gage is
for informational purposes only, and controls no functions.