Zenner IMF Montage- Und Bedienungsanleitung Seite 6

English
General information
Read these instructions carefully right up to the
end before starting to mount the device!
The installation has to be done by qualified profes-
sional personnel.
The current laws and regulations as well as the
generally recognised codes of practice have to be
observed for installation and mounting, especially
the PTB technical guidelines R K 8 and K 9 EN1434
part 1+6 (in Germany also AGFW directives FW202,
FW208 und FW510). The seal must not be destroyed
otherwise the validity of calibration and warranty
is void.
The flow sensor is preferably to be installed in
the colder pipe (for heat meters in colder line and
for for heat meters in warmer line) of the system.
The installation and operating instructions of the
calculator and the temperature sensors must be
observed.
Caution with discharge of hot water during the
installation – scalding danger!
No unhindered straight inlet in front of the meter
or outlet behind the meter needed. However, for
heating systems with missing temperature mixing
and temperature stratification a straight pipe
length of min. 10 x D is necessary before the instal-
lation point.
It is important to ensure adequate system pressure
to avoid cavitation.
Flush the system before installation.
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Mount free of clamping, torsion and vibrations.
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Do not lay signal cables parallel to live cables.
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The flow sensor IMF is a multi jet impeller meter.
The flow sensor IMF is a multi jet impeller meter.
The IMF is available in nominal sizes 3.5 m³/h,
6 m³/h or 10 m³/h and is used for a variety of mea-
surement tasks.
The IMF is maintenance free during its service
lifetime.
The flow sensor is intended for connection to a
separate calculator for heat meters for the optional
installation in the supply or return pipe of a heat
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exchanger circuit system. For electrical connec-
tion a cable exists which can be easily connected to
the calculator. Repairs may only be carried out by
the manufacturer or authorized service partners.
Note before installation
The volume pulse input of the calculator must be
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compatible to the pulse output of the IMF (see
technical data device of pulse output).
Pulse value of calculator unit (RW) and IMF must
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match (compare nameplates!).
The installation (supply or return) of the IMF is
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to be done according to the instruction on the
calculator.
The flow sensor IMF may only be operated with
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one to the connection data (see data flow sensor /
device of pulse output) compatible calculator.
Installation flow sensor
Close valves upstream and downstream of the
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point of installation, release pressure.
Normally this is the return (the colder pipe in
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heating systems).
Respect the installation place.
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Please observe the indication on the type plate.
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Respect the direction of flow.
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This is indicated by an arrow on the side of the
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flow sensor.
Dismount the existing flow sensor / fitting.
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Use only new sealing material, clean sealing
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surfaces and check for damage.
Install the new flow sensor in the correct flow
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direction and in the correct installation position.
The register always has to face upwards.
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Open the valves slowly – purge and start opera-
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tion, avoid water hammers make sure there is no
leakage.
Check the installation place for leaks.
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Make electrical connections to the calculator.
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Fill out the commissioning protocol according to
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local or legal requirements.
Connection of the flow sensor to the calculator
Connect pulse output of the IMF with volume pulse
input of the calculator (usually terminal 10 and 11).