TRK
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Then, remove the four screws from the cover at the top of the collector with a screwdriver,
and remove the cover with its insulation. Put it aside so it cannot fall.
If the faulty tube is immediately adjacent to a M8 fixing screw, undo the screw with a
SW6 Allen key, otherwise you cannot remove the tube. However, do not fully remove
the screw. Fully remove the screw if the faulty tube itself is secured by it.
However, never fully undo both screws, otherwise the tube would no longer be
held!
Now hold the faulty tube with one hand at the plastic cap and, with your free hand,
push the plastic slider aside that retains the tube at the header. Remove the slider
from the header.
WARNING, RISK OF INJURY
As the tube is no longer held by the collector, the slope of the roof could
lead to it sliding down out of the collector and falling off the roof. This
represents a risk for anyone below. Therefore, the tube must be held by
the second person during the following removal.
Push the tube with both hands off the header. Never use tools, otherwise the
header could be damaged.
Replacing the O-rings
Carefully by hand or with the cloth, remove both O-rings from the header connection,
where the tubes were plugged in. Ensure that the sealing faces are not damaged.
Clean the header connection with the cloth. Push on both new O-rings: first the black-
yellow one, then the black one. Lubricate the connection and both O-rings with the
grease supplied. Only use the grease supplied. Under no circumstances use
mineral-based grease and never deviate from the sequence described here.
