5
x
Control
36
FA ROTEX A1 B0 - 10/2007
5.6
Changing the flue gas temperature sensor
The flue gas temperature sensor is mounted in the flue gas duct of the heat generator using a packing gland and connected to
the sensor cable using a floating plug connection.
1.
Remove the sound insulation hood and the boiler panelling. Release the plug connection on the sensor cable (fig. 5-14).
2.
Unscrew the sensor sleeve from the flue gas duct by using an SW 24 wrench (fig. 5-15).The flue gas temperature sensor can
only be completely changed with the sleeve.
3.
Screw in the new sensor sleeve into the flue gas duct and tighten it carefully using the SW 24 wrench (plastic thread!).
4.
Restore the plug connection on the sensor cable.
Changing the storage tank temperature sensor
The storage tank temperature sensor is connected directly to the connection terminals 11 and 12 of the 12-pin sensor connector
J8
in the boiler control panel.
1.
Open boiler control panel and remove plug
J8
from the switchboard PCB (see chapter 5.4, Steps 1 to 4).
2.
Pull out the sensor from the sensor immersion sleeve on the storage tank.
3.
Bend the pressing springs on the new sensor and push the new sensor into the sensor immersion sleeve.
The insertion depth is marked on the ROTEX storage tank by a coloured marking, depending on the storage tank type.
4.
Clamp the sensor cable on the connector of the connection terminals 11 and 12 of the 12-pin sensor connector
J8
, plug in
the connector on the switchboard PCB and close the boiler control panel.
Fig. 5-14 Release the plug connection for the flue gas
temperature sensor
Fig. 5-15 Unscrew the flue gas temperature sensor
For further information on fitting the storage temperature sensor see: "Storage temperature sensor"
installation instructions.
