Zenner zelsius C5-ISF Instrucciones De Instalación Y Funcionamiento página 19

Installation flow sensor (FS)
Mount ball valves up- and down-
■
stream of the flow sensor.
Consider the correct installa-
■
tion point. Normally this is in the
return pipe (colder pipe at heating
systems). Note the type plate
information.
Consider the correct flow direction.
■
This is indicated by an arrow on the
side of the flow sensor.
At C5-CMF type A1, the arrow is
■
at the bottom of the measuring
capsule.
Install horizontally, horizontally
■
tipped by 90 ° or vertically only, not
tilted, inclined or overhead. Instal-
lation into horizontal or upstream-
ing or downstreaming pipelines.
Do not install at highest point of
■
piping to avoid air inside the flow
sensor.
Consider the dimensions of the heat
■
meter. Axial distance between two
flow sensors at least 135 mm.
Installation of the ball valve for the
temperature sensor
In case of new meter sites install a
■
ball valve with a thread hole M10x1
for the external temperature sensor.
For C5-CMF type A1 a special ball
valve with temperature sensor con-
nection M12x1.5 (external thread)
is required.
For symmetrical temperature sen-
■
sor installation, mount an identical
ball valve in the return.
19