10 11 b) Tighten all the way the reduction fitting A on the installed reduction fitting B. a) Put on the two halves of the reduction fitting B onto the Danfoss RAN insert. Method of installation of the TRA head on a radiator with an M30x1.5 insert In order to install the Auraton TRA head on a radiator with the most common insert in the market, i.e. M30x1.5, the following actions must be performed: a) Screw the reduction fitting A onto the insert delivered with the head (all the way). b) Takeoff the head battery cover using a flat screwdriver. c) Install two AAA batteries in the head, paying attention to their polarity. The pin of the head moves to the fully open position, which is necessary for installation of the head on the reduction fitting.