Hubbell Electric Heater Company J - Manual (Page 34)

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Note: It is unnecessary to unscrew the
thermowell from the vessel to replace the P65 sensor.
Cord P65 Sensor
Shrink-Wrap Cap
5. Insert the new P65 sensor assembly into the P65 thermowell. Be sure to insert the
sensor until the shrink-wrap cap engages the threads on the end of the thermowell.
Note: The new sensor and cord assembly is push-fit onto the end of the thermowell
threads. Do not twist the new sensor and cord assembly into the thermowell. The
thermal conductive heat transfer paste inside the thermowell is sufficient for
replacement sensors. Adding additional paste is not required.
6. Plug P65 probe connector into the T1000 control board.
7. Turn on power to the unit. If display shows “Err, No, Prb”, press the reset button.
P65 THERMOWELL
1. Follow steps 1-4 for removing the P65 Sensor Probe above.
2. Shut off incoming water supply.
3. Attach hose to drain connection.
4. Lift manual release lever on relief valve to let air into system or break union on
outgoing water line.
5. Drain water from tank.
6. Remove the thermowell from tank using a 13/16” socket.
7. Install new #115 Buna-N o-ring gasket
and install new thermowell. NOTE:
Hubbell recommends lubricating the o-
ring with Parker O-Lube prior to
installation. WARNING: Do not remove
the jam nut.
Thermowell
8. Reinstall or install a replacement P65 sensor
probe in accordance with steps 5 and 6 above.
9. Refill tank.
10. Check for leaks. Retighten as required.
11. Turn on power to the unit.
12. Note that to resume operation the controller will need to be reset by pressing the
‘RESET’ button on the display.
CAUTION: Do not use plumber’s tape/Teflon tape/pipe dope when installing the P65
Thermowell. Tape will prevent the low water detection system from operating properly and
will cause false low water errors. Lubricate O-ring prior to installation.
Tighten probe at the brass hex flats only.