Replacement of parts
6 720 808 928 (2017/06)56
8.6 Heat meter
Refer to figure 68
▶ Ensure the appliance is fully drained.
▶ Release the integrator assembly[4] via the locking buttons [3] on
either side of the extension arm.
▶ Undo the connection pipes [2].
▶ Remove the heat meter body[1].
▶ To refit, follow the above in reverse. Ensure any seals that have been
disturbed are renewed.
Fig. 68 Heat meter removal
8.7 Expansion vessel
Refer to figure 69
▶ Retract the securing clip [3] on the expansion vessel connector.
▶ Remove retaining screw [1] on the expansion vessel bracket.
▶ Ease forward and then lift up the expansion vessel [2] out of the
connector and foam insulation.
Fig. 69 Expansion vessel removal
8.8 Domestic hot water NTC sensor and safety valve
Hot water NTC sensor
Refer to figure 70
▶ Ensure the domestic hot water circuit is fully drained.
▶ Disconnect the electrical connection [4] from the sensor [1].
▶ Withdraw the spring clip [3].
▶ Remove the sensor [1] from the housing.
▶ To refit follow the above actions in reverse.
Hot water safety valve
Refer to figure 70
▶ Ensure the domestic hot water circuit is fully drained.
▶ Undo the connection pipes [2].
▶ Remove the safety valve.
▶ To refit, follow the above in reverse. Ensure any seals that have been
disturbed are renewed.
Fig. 70 Hot water NTC sensor and safety valve removal
CAUTION: Correct orientation:
The safety valve will not work if installed incorrectly.
▶ When re-installing the safety valve, ensure correct
orientation. The label indicates an arrow pointing in
the direction of flow (downwards).
Replacement Hot water safety valve
▶ Only use the supplied Blue PTFE washer when
replacing the Hot water safety valve.
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