23
for electrical installations have to be
followed. Make sure no heating wa-
ter escapes during installation – this
can cause burns! Do not carry the
meter by the cables.
The maximum heating water tem-
perature at the ow sensor may not
exceed 105ºC or 130°C. For heating
systems with a lack of temperature
mixing resp. with temperature stra-
tication a straight pipeline of min.
10xDN has to be provided upstream
of the meter. It is important to ensure
adequate system pressure to avoid
cavitation. To mount the heat com-
puter of the C5-IUF in combi version
on the wall, the supplied mounting
adapter has to be used.
With heating water temperatu-
res with 90°C and more as soon
as combined heat and coo-
ling measuring or only cooling
measuring the calculator have to
mount on the wall for protection
of external condensation. The
supplied mounting adapter has to
be used (In the case of refrigeration
and combined heat / cold metering
devices, the cash registers are not
calibrated and may not be used for
billing purposes in commercial tran-
sactions. For this purpose, devices
with a separate type-examination
certicate are currently required)
Mounting flow sensor (DFS)
■
Mount ball valves up- and
downstream of the DFS.
■
Consider the correct installation
point (supply or return). Normally
this ist the return pipe (cooler
pipe at heating systems). Please
note the type plate information.
■
Consider the correct ow direc-
tion. This is indicated by an arrow
on the side of the VMT.
■
The ow sensor can be installed
in any position (also „overhead“).
■
Do not install at highest point of
piping to avoid air inside the ow
sensor.
■
Consider the dimensions of the
heat meter.
Notes to installation of the ball
valve
■
Mount ball valves up- and
downstream of the meter.
■
Mount a ball valve with bore
M10x1 for direct sensors in the
supply. This is required for the in-
stallation of the supply sensor.
■
For symmetrical temperature sen-
sor installation, mount an identical
ball valve in the return. This one
is used for mounting the return
sensor.
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