Hubbell ETXA Series, Description, Installation And Operation Manual, Page: 42 / 52

42
Inlet Thermistor:
•
Disconnect power.
•
Open door.
•
Disconnect inlet thermistor wires from terminals marked
JP1 on the temperature controller.
•
Cut the tie-wrap securing the inlet thermistor wire
to the inlet pipe and unscrew the inlet thermistor.
•
Screw in new inlet thermistor and secure the inlet
thermistor wire to the inlet pipe with a new tie-wrap.
•
Connect the new inlet thermistor wires to terminals
marked JP1 on the temperature controller.
•
Close door.
•
Turn on power.
Temperature Thermistor
Outlet Thermistor:
•
Disconnect power.
•
Open door.
Temperature
Controller
Outlet
Thermistor
•
Disconnect outlet thermistor wires from terminals
marked JP2 on the temperature controller.
•
Cut the tie-wrap securing the outlet thermistor
wire to the outlet piping and unscrew the
outlet thermistor.
•
Screw in new outlet thermistor and secure the
outlet thermistor wire to the outlet pipe with a
new tie-strap.
•
Connect the new outlet thermistor wires to terminals
marked JP2 on the temperature controller.
•
Close door.
•
Turn on power.
Inlet
Thermistor
Temperature Controller:
•
Disconnect power.
•
Open door.
•
Mark the wires going to the controller so they can be re-connected in the same places
upon replacement.
•
Disconnect all the wires from the controller.
NOTE: The display may need to be removed to access the wires from the flow meter.
The display can be removed by removing the four (4) screws securing the display to the
controller standoffs and then pulling the display from the socket.
•
Remove the two (2) screws securing the temperature controller to the controller stand.
•
Install the replacement controller with the two (2) screws removed in the last step.
•
Re-connect the wires to the temperature controller in the same locations they were
previously disconnected from.
•
Close door.
•
Turn on power.
TK22500 Temperature controller