8.5
Element Fitting and Replacement
Replacements: see section 7.7. If at any time the power limit has been increased, reset
it to its original value (see section 11.0 at the back of this manual for the original value).
New elements must not be mixed with aged elements. If a single element fails in an
aged set of elements then replace with a new set. The remaining aged elements can be
used as spare parts in the future.
Disconnect the product from the electrical supply.
Remove the side panels to gain access to the element connections.
Remember that the elements are fragile and expensive and that they can be damaged
by contamination: handle them with care and keep them clean.
First Fitting: The product is supplied with all element connection braids in position,
except for 3 off loose braids. Insert the elements as explained below and connect the
fitted braids to the adjacent element ends. Connect the loose braids in pairs to the
unconnected ends, on the same side of the product as the element power terminals.
Replacements: Replace each element in turn. Release the clips using the tool provided.
Move the braids and carefully withdraw each element: it may be necessary to remove
the element sleeve with the element.
Carefully insert the new element, locating the sleeves as shown. Sleeves are fragile: it
may be necessary to use new ones. Ensure that the element hot zone is equally placed
within the chamber.
Connect the braids. Check that the braids cannot touch each other or the case and that
there is no short circuit to earth.
If aged elements have been replaced, reset the products power limit.
Refit the panels and test the product.
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