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Maintenance
Replacing the pyrolysis oven
Disable the supply voltage.
Remove the cover of the Polytron 7500. To do this
1 gently pull apart the cover on both sides and
2 lift upwards.
Attention!
When the unit is opened, there is the danger of scalding yourself on hot
parts of the Polytron 7500.
Only use a pyrolysis oven, which is suitable for use with the Polytron 7500 with
the defined gas type, see "Order List" on page 64.
Disconnect the three electrical connections of the pyrolysis oven on the printed
circuit board.
Loosen the two screws for fixing on the rear side – do not unscrew completely.
Remove the pyrolysis oven upwards from the holder.
Remove the hoses to the pyrolysis oven and connect to the new pyrolysis oven at
the same position.
Insert the new pyrolysis oven from above into the holder and tighten the two
screws.
Reconnect the three electrical connections of the pyrolysis oven.
Refit the cover of the Polytron 7500.
Switch on power supply.
Wait until the sensor has fully warmed up.
— The Polytron 7500 is ready for use again.
Page 26 of 72 Pages
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9023927 - 2nd edition - May 2007
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