Zenner zelsius C5-ISF Notice D'installation Et D'utilisation page 56

ALLOWED MOUNTING POSITIONS
All the versions of the heat meters can be installed both horizontally and vertically. For a better
performance it is preferable, however, the horizontal installation, with the turbine axis perpendicular to
the ground and the reading mechanism facing upwards.
"Upside down" mounting position is not allowed (see picture below).
GE552Y215-6-7 User Manual v1.9.1
Position allowed.
Ideal for a better
metering
performance.
Positions allowed.
ENG - 4