Checking Thermocouples; Replacing Thermocouples - Conair Thermolator TW-1 User Manual

The Thermolator uses two type 'K' thermocouples
to monitor supply and return process temperatures. One ther-
mocouple is installed in the wall of the heater tank at the "to
process" outlet. The other thermocouple is installed in the wall
of the cooling tank at the "from process" inlet.
To check a thermocouple after a probe error:
1
Disconnect and lockout the main power.
2
Open the electrical enclosure door.
screw on the front panel counterclockwise to open.
3
Unplug the appropriate thermocouple from
the motherboard and install a jumper on the leads. Refer
to the wiring diagrams that came with your unit.
4
Restart the Thermolator.
u If error message disappears, replace the thermocouple.
u If error message does not disappear, replace the moth-
erboard. See Replacing the Motherboard, Section 6.
To replace a thermocouple/or PT1000 Sensors:
1
Disconnect and lockout the main power.
2
Shut off the cooling water infeed and drain the
unit. Drain all water using the drain plugs located in the
bottom of the unit.
3
Remove the unit's top panel
and open the electrical enclosure.
4
Remove the thermocouple/sen-
sor.
Loosen the compression nut to
slide the thermocouple out of the cas-
ing. Disconnect the thermocouple wires
at the motherboard.
Install the new
5
thermocouple/sensor.
of the new thermocouple at least 1
inch into the tank. tighten the com-
pression nut. Thread the leads
through the raceway leading to the elec-
trical enclosure. Attach the thermocou-
ple leads to the motherboard.
UGH025-0504
Turn the
Nut
Insert the tip
Thermocouple
/Sensor
Thermolator TW Series
C
HECKING
T
HERMOCOUPLES
TW-1
AND
C
ONTROLS
R
EPLACING
T
HERMOCOUPLES
PT1000
OR
S
ENSORS
WARNING:
Hot surfaces
Allow the Thermolator to cool
to below 100°F (38°C) before
servicing the unit.
T
ROUBLESHOOTING
TW-2
/
6-23