Service Handbook OEB/OES/OGB/OGS
AS/11-2011 4_04e_CONVOTHERM Descaling_b
4. In the steam outlet opening (hole behind the suction panel in the rear oven wall, see
pos. 3 in the drawing) fill the descaler in with the help of a hose with a funnel
(amount dependent on the scale build up; in 6.10, 6.20 and 10.10 approx. 4 liters, in
10.20, 12.20, 20.10 and 20.20 approx. 7 liters).
As an alternative, the descaler can be filled in via the opening for the water level or
the water inlet of the back flow protection.
5. "Over fill" the steam generator with the help of the hand shower via the steam outlet
opening with water until the water spills out of the steam outlet opening
6. After the working time, depending on the amount of scale build up (30 min. to max. 1
h), switch unit on again and empty the steam generator with the help of the steam
generator pump as described in Step 1.
7. Check that settling chamber and filling gap are free of scale and if necessary repeat
cleaning.
Attention:
8. Before operating the CONVOTHERM unit, over fill the steam generator at least 7 x
with clear water (with the hand shower in the steam outlet opening) and each time
empty the steam generator afterwards with the help of the steam generator pump as
described in Step 1.
If a un-named product is used for descaling, the steam generator must be over filled
with clear water at least 20 x
and emptied again. (Un-named products lead to
heavy foaming).
9. After cleaning the steam generator, clean (=neutralize) the oven with the original
CONVOTHERM oven cleaner as follows:
Flush the oven out thoroughly with the hand shower
Spray oven with CONVOClean new / forte and allow to work 10 min.
Flush the oven out again thoroughly with the hand shower.
10. Fasten the suction panel and hang the hanging rack again according to instructions.
Notice:
Page 6 / 8
When you are descaling the steam generator, it is recommended that other water
conducting parts as described in Chapter 4.3 are descaled.
Notice:
For heavy scale build up and a water hardness > 18°dH (problem water), we recommend
the following:
Check the water tightness of the steam generator pump and the water level probe
during descaling in the unit
Recommend to your customers a partial decalization system (hydrogen ionic
exchanger i.e. from the company Brita).
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