Data Sheet for Product

Free Energy Band TH 193 HC Heating/Cooling Room Thermostat Technical Instructions
Document Number 155-068P25
February 14, 2022
Siemens Industry, Inc. Page 11
Chassis Tube
Connector and
Restrictor Plate
Replacement
1. Remove the thermostat chassis from the wall. The terminal does not have a ball check
valve.
NOTE: You must close off the supply air. For example, use a connector with the
supply air terminal plugged.
2. Remove the two Phillips head screws from the connector on the back of the thermostat
chassis. Pull the connector out of the recess. If necessary, pry the connector loose with
a screwdriver, but be careful not to damage restrictor plate and gasket.
3. Remove the gasket from under the connector. Remove the restrictor. Remove the
second gasket from under the restrictor.
4. Use Restrictor Replacement Kit 192-321 to replace the gasket, restrictor, and second
gasket.
NOTE: The restrictor plate is keyed to ensure proper orientation during installation.
5. Remove the filters from the existing connector and insert in the new connector. Or, if the
filters are dirty, use Restrictor Replacement Kit 192-321 to replace the filters.
6. Use Chassis Tube Connector Replacement Kit 192-525 to replace the connector and
mounting screws.