Finish Thompson BE-55C - Manual (Page 23)

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TAS4 is a switch rated for 180ºF. This will be indicated by “L180” written on the sensor. The sensor
should reset at 100ºF. If TAS4 has tripped, this indicates that the Distillate Piping has overheated. This
can occur if the operator attempts to fill the Process Tank when the BE unit is still hot. The uncooled
steam created can trip TAS4, preventing the unit from turning on. If the unit is cool, TAS4 should have
reset, if not, TAS4 is defective and must be replaced. Other reasons TAS4 will trip:
 Pump Reservoir is low. This is the most common cause. The reservoir only needs to be about a
1/2” low to cause poor coolant circulation through the condenser. Top off the reservoir until it
overflows from the Processed Glycol Hose.
 Unit installed in too warm of an area. If the ambient temperature around the unit gets above 100ºF,
then the unit can overheat. Verify good, cool ventilation in the installation area. Avoid installations in
small-enclosed rooms or near space heaters and heated parts washers.
 Improper air circulation. Clean the finned-tube surfaces of the Radiator by carefully blowing
compressed air through the fins from the inside to the outside. Clean the fins with a degreaser if
necessary. Verify that the rear of the unit is installed a minimum of one foot from a wall. Also be
sure that objects are not stacked around the rear of the Radiator (that will impede air circulation).
 Radiator blocked internally from debris or scale. One hint that the Radiator is restricted would be if
the air blown through by the fan does not feel warm (after the machine has been running for
awhile). Perform a flush of the Pump Reservoir and Radiator as outlined in the “Maintenance –
Semi-annually” section. If the low flow or blockage persists, perform a radiator flush using a
commercially available flushing system. Also, worn, kinked, or deteriorated hoses can restrict flow.
Replace any suspect hoses with standard 1/2” automotive heater hose.
PROBLEM: DISTILLATE APPEARS DIRTY OR DISCOLORED.
Possible Cause 1: No problem. This can be normal
 Recycled Glycol from the BE unit will have various tints - colorless or green, amber, orange or
brown. This color comes from small amounts of dyes and does not affect the performance of the
product once properly reinhibited.
Possible Cause 2: Oil in Waste Coolant Feed.
 Recycled Glycol that is dark brown with a film floating on the top (and a foul odor) is due to
excessive oil in the waste feed. All attempts must be made to eliminate any oil-type contaminates.
Allow the waste coolant to settle in your storage drum, use oil-absorbent pads, and pump the waste
coolant from the center of the storage container, taking care to not pump out the top and the
bottom. A 5-micron pre-filter may also be helpful.
The oily residue will contaminate the process tank and the pump reservoir. Both need to be flushed and
cleaned according to the “maintenance: Semi-annually” section of this manual.