Specifications

TM040 16, 18 & 20L Continuous Flow Gas Water Heater Service Instructions

D.O.I: 2/06/2009

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Flow Sensor Turbine

1. Isolate cold water supply.

2. Remove the Front Panel. Refer to „Front Panel‟ procedure on page 48.

3. Unscrew the Water Drain Valve assembly (item 32) and Pressure Relief Valve (item

30) and drain the water heater.

4. Disconnect the cold water supply pipe from the cold water Inlet Connection.

5. Disconnect the Bypass Solenoid wiring loom plug.

6. Remove two retaining screws holding the Flow Sensor to the Water Body Assembly

and remove Flow Sensor.

7. Using a flat blade screwdriver lever the metal disc and o-ring from the Flow Sensor

housing on the Water Body Assembly. Lever the disc out by placing the shaft of the

screwdriver across the disc with the tip of the screwdriver on the far inside edge of the

disc.

8. Remove the four screws from the cold water Inlet Connector and withdraw the Inlet

Connector and o-ring from the base of the water heater.

9. Gently withdraw the Flow Sensor Turbine out through the water inlet of the water Body

Assembly using a pair of long nose pliers.

10. Reassemble in reverse order of above ensuring open slot on turbine is centred and

facing towards the face of the flow sensor.

Combustion Fan Motor

1. Remove the PCB Assembly. Refer to „PCB Assembly‟ procedure on page 48.

2. Remove the two screws retaining the Power Filter (item 9) to the Combustion Fan

Motor.

3. Remove the remaining three screws retaining the Fan Motor and lift Fan Motor clear.

4. Disconnect the multi-pin wiring plug from the Fan Motor.

5. Reassemble in reverse order of above.

Igniter

1. Remove the Upper Burner Assembly. Refer to „Upper Burner Assembly‟ procedure on

page 49.

2. Disconnect black high voltage lead from Igniter Electrode on the right hand side of the

Upper Burner Assembly.

3. Disconnect the multi pin connector from the Igniter.

4. Replace the Igniter.

5. Reassemble in reverse order of above. NOTE: Ensure wiring to Igniter Electrode and

Flame Sensors is not pinched during reassembly.