Hubbell Electric Heater Company J User Manual download pdf (Page 26)

SECTION V - SERVICING & REPLACEMENT OF PARTS

WARNING / CAUTION

Before servicing or replacing any part, make sure to turn the power supply to the unit OFF.

HEATING ELEMENT

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 the wires from the heating element terminals.

7. Unscrew element with a 1-7/8” 6-point socket with no bevel.

O-Ring Groove O-Ring Terminal Connections #220 Buna-N O-Ring

8. Install new #220 Buna-N o-ring gasket and install new heating element. NOTE: Hubbell recommends

lubricating the o-ring with Parker O-Lube prior to installation.

9. Rewire element according to the wiring diagram as shown in the Section II.

10. Fill tank and check around element for any leaks.

MAGNETIC CONTACTOR

1. Disconnect power from unit.

2. Disconnect line and load wires to contactor.

3. Disconnect the control circuit wires.

Control Wires

Line Wires

Load Wires

4. Loosen holding screws and remove contactor.

Mounting Screws

5. Replace with new contactor using reverse procedure.

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Hubbell Electric Heater Company J User Manual Page 26