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Water
Installation and Operating Instructions
GWF water meters Unico2e, MTK3e & MTW3e - MI-001 - 868 MHz
1. Safety instructions
1. Care must be taken when installing or removing the meter
to avoid electrical shock where water pipelines may ser-
ve as earthing for electrical systems. Depending on actual
application an electrical bypass of the water meter is to be
ensured. The local and national electrical instructions are
to be considered. GWF shall not be liable for improper wa-
ter meter bridging.
2. To avoid the meter being damaged due to frozen water, the
installation should be insulated to protect the meter and
the surrounding pipework and fittings from freezing condi-
tions. GWF assumes no liability for damage caused.
3. Measures should be taken, so that the water meter is not
damaged by hydraulic influences such as, water hammer
and cavitations.
4. During commissioning and after every time the water me-
ter has run dry, shut-off valves must be opened slowly in
order to avoid pressure shocks on the water meter.
The water meters may only be used for the intended purpose.
The manual serves as a guide for correct installation and ope-
ration, and failure to follow these instructions releases GWF
from any liabilities. The responsibility for the correct installa-
tion as well as professional handling falls within the scope and
receipt of goods on the owner or operator.
2. Field of application
Model
Nominal diameter
DN mm
Permanent flow rate
Q
3
Max. working pressure
Max. medium tempe-
T
rature
Ambient temperature
T
amb
Transport & Storage
temp.
Operating temperature
(Display and Electronic)
Register
Interface
MI-001 approval No.
GWF water meters are designed for use with potable water
supplies for residential buildings to measure low to middle
flowrates. This instruction contains all important information
and instructions for the installation and operation of the above
mentioned water meters. Installation, connection and mainte-
nance must only be carried out by expert technicians who have
read and understood the operating instructions. The user ack-
Unico2e
MTK3e
15/20
15 - 50
m
/h 2,5/4
2,5 - 25
3
bar
16
16
°C
30/90
30/50
°C
+5...+55
+5...+55
°C
-20...+70
-20...+70 -20...+70
°C
+5...+60
+5...+60
Electronic register ERH
LoRaWAN and Wireless M-Bus
(Dual mode) 868 MHz
CH-MI001-
CH-MI001-07005
07004
nowledges and accepts that GWF shall not be responsible for
any damages, injuries or losses incurred due to improper in-
stallation or operation that does not align with the instructions
provided in the manual.
3. Packaging content
1 water meter, 2 gaskets, 1 installation and operating instruc-
tion (Number of installation and operating instruction depends
on packaging unit).
4. Sizing of the water meter
GWF water meters are to be sized according to the relevant ra-
tings. A continuous overload will lead to the water meter being
damaged. The maximum overload flowrate Q
1,25*Q
, may only take place at a maximum of 1 hour per day
3
and over the life span of the water meter a maximum of 100
hours summed together. When specifying the water meter the
operating condtions occurring in the application are to be con-
sidered. In particular these are:
■
Permanent flow rate, Max. working pressure
■
Max. medium, operating and ambient temperature
■
Installation position (Riser- or down/fall housing)
5. Installation instructions
MTW3e
1. The installation must not expose the water meter to direct
15 - 50
sunlight.
2,5 - 25
2. The water meter should be installed in a frost-free envi-
16
ronment, which allows access for reading, maintenance
90
and inspection. We recommend a minimum distance of 20
cm from the face of the register. In all other directions of
+5...+55
the meter we recommend a minimum distance of 10 cm.
3. Metallic surfaces directly around the water meter as well
as external cables, which are wrapped around the water
+5...+60
meter, interfere with the radio signal and are therefore
must be avoided.
4. It is recommended to install shut-off valves upstream and
downstream of the water meter, to facilitate the installati-
on and removal of the water meter for periodic inspection
and maintenance work.
5. Singlejet meters (Unico2e) can be installed in horizontal
or vertical pipelines. It is prefered that the installation is
made in horizontal pipelines. The register face of singlejet
, calculated as
4
Volume
Weight
Material
Material no.
Color
512774.67 mm³
1514.83 g
Elektronic
Description
Name
Date
Unico USA Massbilder
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