Finish Thompson BE-15/15C - Manual (Page 6)

6
HISTORY OF DESIGN CHANGES:
Take special note of the serial number of the unit. This number can be found on a nameplate located on
the left side panel (a five digit sequence number, a letter corresponding to a month, then the year built). It is
vital to know the design vintage of your “BE” unit. Older units used 120 VAC controls while later design
units use 240 VAC controls. Replacement parts and voltage readings will differ between the two designs.
Following is a brief overview of the update history for these units:
Date
Code
Design Change
or Modification
Description of Change
or Noteworthy Information
E91 External Level Control Probe Previous units had the probe mounted in the top of the Process
Tank. The probe was relocated into piping next to Fill Funnel.
E91 350
 Temp Switch removed
Safety shutdown system was omitted eliminating a snap switch,
relay, and reset switch.
F91 180
 Temp Switch (TAS1) added
This was added to turn on the water flow or compressor once the
tank reached 180
. This helped to prevent excessive
condensation on the piping inside the cabinet. TAS1.
J91 150
 Temp Switch (TAS4)
added
This temp sensor was added to the distillate piping near the divert
valve to shut the unit down in the event of improper cooling.
TAS4.
K91 “Chiller” system eliminated The refrigeration cooling system was replaced by the air-cooled
radiator. Most of the earlier built “Chiller” systems have been
refitted with an air-cooled system.
F92 240 VAC control system The original 120 VAC controls were changed to 240 VAC.
Components changed were the on/off switch, contactor, level
control board, and coils for solenoid valves.
J92 Stainless steel pins in Divert
Solenoid Valve Original valve used plastic pins that melted if the unit overheated.
The stainless steel variety is more reliable.
K92 Changed 410
 Temp Switch
(TAS2)
The tank overtemp switch was changed to an auto-reset 385
 snap
switch. The 410
 version was a manual reset switch. TAS2.
J93 Changed Level Control Board Changed from a “Series 16” to a “Series 26” board.
L93 Changed Condenser The all copper “Champ” condenser was replaced with a
CuNi “Sendure”. More corrosion resistant.
I94 Changed Divert Temp Switch
(TAS3) Original type used soldered connections for the wires, and had a
metal casing. The new version is ceramic and uses push-on
connectors. The 280
 temp rating is unchanged. TAS3.
L95 Change 150
 Temp Switch
(TAS4) to 180°.
The distillate piping overtemp switch has been changed to a 180

version, allowing units in warmer climates to operate a little
warmer.
E96 Added a support bracket for the
condenser. A bracket was hung from the top panel and bolted to the divert
valve to help prevent condenser breakage.
K96 Changed Condenser Changed to an all-braised construction condenser capable of
handling higher temperatures.