Technical data

9.2.6 Burner / spark ignition probe

Remove the front cover of the heat exchanger as described in §9.1.2.

Unscrew the 4 screws shown on the photo to allow the stainless steel

burner mesh to be removed. These screws are Torx 20 (RVS A2 4,2x25”) or

Allen bolt M4x20 (units before 2006). The burner gasket should be checked

and replaced if damaged. Replace the burner mesh assembly and refit the

screws.

The spark ignition probe is shown in the photo in §9.1.2 and also the

diagram in §8.3. To replace the probe, pull off the ignition cable and

unscrew the 2 screws (Allen bolt M4x8). The seal should be checked and

replaced if damaged. Replace the probe and refit the seal and the screws.

Check the spark gap and replace the front cover, as described in §9.1.2.

9.2.7 Flow / return temperature sensors

The supply temperature sensor is located above the return temperature

sensor. The latter is shown in the photo. Disconnect the two pin connector

and release the spring clip. Pull out the sensor and replace.

9.2.8 Hot water temperature sensor

Remove the electrical connector and replace the sensor.