Mounting Flow Sensor (Dfs); Notes To Installation Of The Ball Valve; Mounting Heating-/Cooling Energy Meter - Zenner Zelsius C5-ISF Manual De Montaje E Instrucciones

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can cause burns! Do not carry the
meter by the cables.
The maximum heating water tem-
perature at the flow sensor may not
exceed 105ºC or 130°C. For heating
systems with a lack of temperature
mixing resp. with temperature stra-
tification 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-ISF 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. Glycol-compatible meters
may not be used for billing purposes
in commercial traffic. In the case of
refrigeration and combined heat /
cold metering devices, the cash re-
gisters are not calibrated and may
not be used for billing purposes in
commercial transactions. For this
purpose, devices with a separate
type-examination certificate are cur-
rently required.

Mounting flow sensor (DFS)

■
Mount ball
downstream of the VMT.
■
Consider the correct installation
point (supply or return). Normally
valves up- and
this is the return pipe (cooler pipe
at heating systems). Please note
the type plate information.
■
Consider the correct flow direc-
tion. This is indicated by an arrow
on the side of the VMT.
■
Install horizontally or vertically
only, not tilted, inclined or over-
head. Installation into horizontal
or upstreaming or downstrea-
ming pipelines.
■
Do not install at highest point of
piping to avoid air inside the flow
sensor.
■
Consider the dimensions of the
heat meter.
Notes to installation of the ball
valve
■
Mount ball
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.
Mounting heating-/cooling ener-
gy meter
■
Flush the system thoroughly be-
fore installing the heating-/cooling
energy meter.
■
Close valves and release pres-
sure.
■
Dismount the existing flow sensor
or meter blank.
valves up- and
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