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Cleaning the decomposition vessel
All tasks described in this section must be
performed only by a knowledgeable professional!
All tasks performed on the fittings of the
decomposition vessel require a leak test to be
performed again. In addition, we refer you once
more at this point to the Regulation for pressure
devices 2014/68/EU.
Before cleaning, check whether the combustion was complete.
Remove particles that were not burned. Check whether the
ignition wire underwent complete combustion. Any residue of
ignition must be removed completely from the electrodes and
subtracted from the amounts weighed in for correction purposes
if appropriate (see the section entitled Securing the ignition wire
in place).
After every combustion, all parts of the decomposition vessel that
come in contact with combustion products must be cleaned of
condensation and dirt.
In most cases, wiping off the parts with an absorbent lint-free
cloth will be sufficient for this purpose.
The parts can also be rinsed with water and dried with (oil-
free) compressed air. You should also check after every
combustion to make certain the three side holes (diameter 2
mm) on the cover (Item 2) are not dirty. These holes are used
for pressure build up on the electrode pass through (conical
seal) and thus prevent heavier accumulation of dirt on the seal.
If the decomposition vessel cannot be cleaned in the
manner described (for example because of holes burned in
it or holes eaten in by halogens), it should not be subjected
to mechanical cleaning under any circumstances. Please
contact our technical service department or send the
decomposition vessel in to the factory for checking and cleaning.
Ignition electrodes represent an exception to this rule (Item 9).
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To avoid contact problems, they can be removed with a piece of
finegrit sandpaper. Make certain that no sanding residue gets in
the seal when you do this!
The amount of dirt on the decomposition vessel may vary
depending on the product and its combustion properties. You
can determine the amount of time spent cleaning and the time
between cleanings yourself by dismantling the decomposition
vessel after the first combustion of a product and examining it
for dirt.
For your own safety, pay particular attention to how clean the
sealing elements are and to any signs of wear and tear on them:
•
Main cover seal (O-ring)
•
Electrode pass through (conical seal)
Disassembling
the
main
Item 8
cover seal
Item. 6
If the main cover seal (Item
17) is heavily soiled, you
can disassemble the cover
(Item 2) and clean this
O-ring. To do this, loosen
Item 17
the flange (Item 8) with
Item 2
Item.1040
the single-ended open jaw
Item 9
SW13 spanner. To loosen the
flange, use the mandrel (Item
Check the hole for soiling
1040) included with delivery
to keep the electrode (Item 9)
from turning as well.
Remove the flange by turning counterclockwise and remove the
insulation bushing (Item 6) made from plastic.
The locknut (Item 11) is held in place by its left threading. Loosen
it by turning it clockwise! You can also use the assembly mandrel
(Item 1040) to do this, holding it against the electrode (Item 9).
If you use the electrode on the side as a limit for the assembly
mandrel, you avoid the release of the central electrode.
Item 1040
Item 11
Item 3
Item 12
Item 17
Item 1040
Item 9
Now you can disassemble the cover nut (Item 3), pressure ring (Item
12) and main seal (Item 17). Make certain you follow the correct
order when reassembling. Screw on the locknut (left threaded) as
far as it will go and then check the play of the pressure ring or
cover nut. When it is assembled correctly, the cover nut has about.
Disassembling the electrode pass through (conical seal)
DThe electrode pass through is sealed by a combination of surface
seal (cone) and O-ring. The pressing force of the O-ring holds the
electrode in the cover.
To disassemble, press the
central electrode (Item 4) out
of the hole.
Check the nature of the
cone surface of the central
electrode (Item 4). It must not
have any tears or scratches.
Item 4
In addition, the plastic conical
seal (Item 19), which is now
visible, must not be mechanically damaged!
The seals can also be removed
Item 19
with the aid of an assembly
mandrel (Item 1040) by pushing
them slowly through the hole
from behind.
Item 4
Please note:
The plastic conical seal (Item
19/16) consists of two parts.
The O-ring seal ring (Item 18) is
located between then.
Item 1040
When
you
reassemble
the
parts, make certain you do so in
the correct order! Tighten the
electrode (Item 4) with the flange
(Item 8) again (single-ended open
Item 19
jaw spanner SW13 and mandrel).
This will pretension conical seal!
Item 18
Item 16
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