Olsberg 14/512-3 Notice D'utilisation page 26

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3a
Insert the channelled bricks using the guide
plates provided, first the SP19 or SP29, then
the channelled bricks from SP39 or SP40. You
will find the number and type of storage brick
packs in the section "Technical Data".
Insert the heating elements into the rows of
slots in the storage core. Push the ends of the
heating elements towards the heater middle.
Push the ends through the slots in the side-wall
insulation mats. Push the heating elements
downwards so that the connecting tongues sit
between the channel brick and side insulation
mat.
Place the cover bricks on to the channel bricks
over the heating elements. Remove the guide
plates.
3b
Push the insulation around the heating element
ends back in. Push the oval insulating washers
provided (in the bag with the wall-fixing screw)
into the insulation over the ends of the heating
elements and twist them such that they are
firmly positioned behind the inside panel.