TESY EVHP 9S 260 60 Instructions For Use Manual page 40

5.6.1.1 Remote link mode
As regards links to digital inputs, the equipment is provided
with an additional 4-core cable that has already been
linked to circuit board of the user interface (placed inside
the equipment Fig. 15). The remote links to any energy
systems must be carried out by a qualified installer
(junction boxes, terminals and connection cables).
The following illustrations show an example of a remote
link (fig. 13 and fig. 14a)
To access the 4-core cable for remote connection it is
necessary to remove the upper cover of the boiler (see
paragraph 8.1 Fig. 108), and take the cable outside
through the dedicated opening, that is already present on
the back cover, as indicated in Fig. 54.
5.7. Wiring diagram