Finish Thompson BE-55C - Manual (Page 24)

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Possible Cause 3: Residue build-up in Process Tank
If proper maintenance procedures are not strictly adhered to, a build-up of residues can accumulate
inside of the process tank. As the residue bakes to the sides and bottom of the tank, it can breakdown
and smoke from the heat, causing discoloration and a foul odor to the recycled products. This build-up
will eventually cause improper operation of the unit and ultimately damage the heater.
Perform a “detergent flush” of the process tank according to the “Maintenance: Semi-annually” section
of the manual as well as conforming to all recommended procedures in the “Maintenance” section of
this manual. Severe residue build-up may require removal of the heater assembly.
Possible Cause 4: Unit running with low vacuum after divert
If the vacuum level after divert is lower than –19’’Hg, the glycol will be processed at higher than normal
temperatures. This can cause thermal breakdown of the glycol and some of the contaminates.
 Return the vacuum performance to its normal levels, refer to “Problem: Low Vacuum Reading”
section of this manual for further instructions.
PROBLEM: WATER IN RECYCLED GLYCOL.
Possible Cause 1: Normal
It is normal to have approximately 10% to 20% water in the Processed Coolant. This will have no
adverse effect on the quality of recycled coolant (water is normally added to antifreeze to obtain the
desired freeze/boil protection). Be certain to account for this water when mixing any additional water
and reinhibitors. Higher than 20% water content can be the result from processing coolant that is low in
glycol content in the first place. Another cause is premature tripping of TAS3.
PROBLEM: GLYCOL IN PROCESSED WATER.
Possible Cause 1: Normal
It is normal to have up to 10% glycol in the Processed Water. Use this Processed water to mix back
into your Processed Coolant to obtain the freeze/boil protection desired.
PROBLEM: ALL DISTILLATE GOES INTO THE PROCESSED WATER DRUM.
Possible Cause 1 & 2: Loose wire on TAS3 or TAS3 is defective or
Stuck/Faulty Divert Solenoid Valve
CAUTION: Disconnect electrical power to the BE unit before performing tests on
the temperature activated Switches (TAS)
Check the wire connections on TAS3. This is a “normally open” switch threaded into the front of the
Process Tank behind the heater access panel. This switch closes when the Process Tank reaches
280ºF. This is supposed to activate the Divert Solenoid Valve to begin processing the glycol. Proceed if
connections are good.