Polycold Cryochiller
Installation
Installation and Operation Manual
Connect the Refrigerant Line Thermocouples (Type T)
Brooks Automation
214072 Revision B
4-37
For all units:
•
Several commands are available to get the individual thermocouple values by name.
•
Each circuit has factory installed Thermocouples for the feed and return lines. Other Ther-
mocouples may be added as desired by the user for monitoring their process. Each cold
chuck should have a Thermocouple.
•
Thermocouple junction must be either a commercially made junction or must be a soldered
or welded junction.
•
Thermocouple junction must NOT be a simple twisted wire junction.
Additional Options available on some units:
•
TC7 and TC8 are available as customer-installed temperature control thermocouples for
Cool and Defrost modes using Host command EXT_TC_ENABLE
NOTE:
If the refrigerant line was made by someone other than Polycold, make sure the thermo-
couples are properly installed. Refer to
Install the Refrigerant Lines on page 4-19
1.
Locate the low voltage box on the refrigeration unit and remove the terminal access
cover. See
2.
Pass the thermocouple wires through the thermocouple wire pass-through.
To access the pass through, push in on the foam insulation at the left corner of the coolant sup-
ply-return connections and pass the wires behind the sheet metal front panel. Then, pass the wires
behind the interface panel and to the thermocouple terminal block.
3.
Locate the external thermocouple terminal block in the low voltage box. See
Figure 4-29: Location of Low Voltage Box and Thermocouple Terminals
Thermocouple
Terminal Block
Thermocouple
Wiring
Pass-Through
Thermocouple
Wiring
Pass-Through
