This manual is valid for the
following meters: 612 family, 620
family, 640 family
Supplied Material:
Each package contains:
• Water meter
• Optional connection kits if ordered
General Instructions:
Please read this guide prior to
installing the water meter. The water
meter is hermetically sealed and
therefore no servicing of the meter
will be required. The water meter is
designed for use with potable water for
residential activities. The meters must
be stored in a dry, cool place, free of
contamination. Please make sure
that during installation all hygienic
standards and recommendations are
respected.
NOTE:
These installation instructions apply
for volumetric water meters
• Volumetric meters with electronic
register can be installed in all
positions (see picture )
• Volumetric meters with mechanical
register can be installed in all
positions, except with a top down
register (see picture ) (due to
the risk of damaging the gears in
the register)
Permissible Operating Conditions
• Cold water meter: from 0.1°C up
to 50 °C
• Pressure stage: MAP16
• Mechanical environment: M1
(MID) xed installation with
minimum vibration
1)
• Electromagnetic environmental
class: E2 (MID) residential
1)
• Climatic environment: from 5 °C
up to 70 °C
• Meters have to be installed in a
stress free condition
Please also note the directions in
accordance with:
• ISO 4064-5:2017(installation
requirements)
• DIN 1988-200 (TRWI-
planning and implementation,
components, ...)
Meters must be installed grounded
and tension free, without any
mechanical stress on water pipes.
For this we recommend installing
meters using a metal meter bracket
with length compensation ttings
(thread dimension acc. EN ISO 228-
1:200 Class B). In cases where the
installation site is not prepared with
these brackets, we recommend
the permanent use of a potential
compensator (“grounding kit”). This
will prevent serious accidents during
installation and operation due to
hazardous leakage currents.
The accessory grounding kit is also
available for purchase from Sensus.
The meter does not need any straight
upstream or downstream pipe (U0D0).
STEP 1:
Before uninstalling the old meter rst
close outlet valve at output, then close
inlet valve!
Thoroughly ush pipe to prevent
contamination of the new meter with
dirt, sediments and/or particulates.
The inltration of dirt, sediments
and/or particles into the meter
may damage it and prevent it from
operating correctly.
1/1A Use new sealing washers
2 Install the meter in the correct
ow direction
STEP 2:
Connect meter on one side with the
unions
3/3AUse your hands to fasten the
unions! Then use key
STEP 3:
Finalizing meter connection
4 Prevent rotation of the meter while
tightening unions
5 Repeat process for the remaining
connection as described in pictures
1-2-3-4. Then tighten the unions with
a wrench. The torque should be min.
20 Nm and max. 30 Nm.
6 Turn register in proper position for
optimum readout
STEP 4:
First lling
7 Inlet side: slowly open the inlet
valve
8/8A Check for leaks
9 Outlet side: slowly open the outlet
valve
Improper rst lling may
lead to water hammer or
piston overspeeding which
can damage the meter and
prevent it from operating
correctly.
Note:
When using a non return valve
please use the appropriate gaskets
depending on the shape of the
connection pipe.
Water meters are calibrated
measuring instruments. Exposing
them to hard shock or not protecting
them against freezing can cause
irreparable damage. Exposure to
excessive heat can damage the
meter.
Orientation of the display
STEP 5
1)
:
All electronic register settings and
functions will be automatically and
correctly activated once the rst
volume of water goes through the
meter or with an activation radio
command. Check Segment test and
the mode of the display
1) additional information for 640-C/M/MC
MD 1670
Installation instructions for volumetric water meters
EN
DE
FR
ES
IT
NL
PL
CZ
SK
ENGLISH
SI
1
2
2
2
3 4
5
7
8
9
3A
8A
6
1A
SE
10
11
10
11
12
640 family
612 & 620 family
4
4
4
4
4
4
4
8
4
8
8
4
4
4
4
4
4
8
4
4
12
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