Service Handbook OEB/OES/OGB/OGS
AS/11-2011 / Item 7016564 6_07e_Steam Generator-Immersion heater replacement_b.doc
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6.7 Steam Generator-Immersion heater replacement (only OEB)
Check:
On-site fault current breaker is tripped.
The warm up time until standy mode is too long.
Safety thermostat N8 is tripped.
Error code E33 = Steam generator heater malfunction
Safety:
When working on the unit, make sure that the main power supply is
disconnected (an all-pole isolation switch with a minimum contact opening of
3mm must be located close to the unit – on site) and ensured against
switching on again.
Safety thermostat must be installed with the cable spring above.
Safety thermostat must be installed in the top immersion heating element.
Instructions – Removing the flange immersion heating element:
Empty the steam generator 1 by starting the automatic steam generator
flushing in the menu Mr. C. (see Chapter 4.2).
Switch off main power supply. (see above safety notice), before the steam
generator is filled again with water.
Disconnect the safety thermostat N8 4 before removing the immersion heating
element 3.
Unclip the connection cables between the contactor and heating element 3.
Loosen and remove the nut M6 from the flange immersion heating element.
Pull the immersion element 3 out from the steam generator 1.
Instructions – Replacing the flange immersion heating element:
Check that the new immersion heating element 3 has a new flat seal 2.
Slide the immersion heating element 3 into the steam generator 1 and fix in
place using M6 nuts with spring washers.
Clip the wires for the heating element to the contactors.
Attention: Make sure the connections are secure on the contactors.
Assemble the safety thermostat probe 4 into the top heating element (with
cable spring positioned above).
1 = Steam generator
2 = Flast seal for heating
element Part no.: ?
3 = Flange immersion
heating element
4 = Safety thermostat probe
N8 Part.: 5002103
5 = Slot for correct
installation of the
immersion heating
element
above