Hubbell Electric Heater Company J User Manual download pdf (Page 28)

SENSOR PROBE

1. Disconnect power from unit.

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. Disconnect probe wire from control board. (See picture)

Probe connection (J3)

7. Remove probe from tank using a 13/16” slotted socket or 13/16” spark plug wrench to accommodate

the probe cable.

NOTE: Care should be taken not to pull or put excessive force on the cable to probe connection.

8. Install new #115 Buna-N o-ring gasket and

install new probe. NOTE: Hubbell

recommends lubricating the o-ring with Parker

O-Lube prior to installation. WARNING: Do

not remove the jam nut. To replace the probe,

remove the entire probe assembly from the

tank.

Probe

9. Reconnect probe wire to control board.

10. Refill tank.

11. Check for leaks. Retighten as required.

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 probe. 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. Use a 13/16” open ended socket or spark plug wrench. Do not

apply pressure, twist, or turn the black wire or the stainless steel jam nut, as this will damage the probe.

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Hubbell Electric Heater Company J User Manual Page 28