Hubbell JHX, Installation, Operation And Maintenance Manual

Page: 37 / 44

37
Inlet
Thermistor
Inlet Thermistor:
•
Disconnect power.
•
Remove cover.
•
Disconnect inlet thermistor wires from the
controller.
•
Cut the tie-wrap securing the inlet thermistor
to the inlet pipe and remove the inlet
thermistor.
•
Spread a pea sized amount of the conductive
thermal paste included with the replacement kit on the inlet pipe where
the replacement inlet thermistor is to be installed.
•
Secure the inlet thermistor to the inlet pipe with a new tie-wrap.
•
Connect the inlet thermistor wires to the controller.
•
Re-install cover.
•
Turn on power.
Outlet Thermistor:
•
Disconnect power.
•
Remove cover.
•
Disconnect outlet thermistor wires from the
controller.
•
Cut the tie-wrap securing the outlet thermistor
insulation.
NOTE: Save the insulation to cover the
replacement outlet thermistor.
•
Remove the aluminum tape securing the outlet
thermistor and remove the outlet thermistor.
•
Spread a pea sized amount of the conductive thermal paste included with the
replacement kit on the outlet pipe where the replacement outlet thermistor is to be
installed.
•
Secure the outlet thermistor to the outlet pipe with a new piece of aluminum tape.
Position the outlet thermistor such that the wires are facing towards the top.
•
Secure the outlet thermistor insulation around the outlet
thermistor with a new tie-wrap.
•
Connect the outlet thermistor wires to the controller.
•
Re-install cover.
•
Turn on power.
Temperature Controller:
•
Disconnect power.
•
Remove cover.
•
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.
•
Re-install cover.
•
Turn on power.
Outlet
Thermistor
Inlet
Thermistor
Temperature
Controller