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meters (Unico2e) can be either on the top or at the side of
the pipe. Multijet meters (MTK3e/MTW3e) can be installed
in horizontal and vertical pipelines, special meter housings
are available. The register face of multijet meters (MTK3e/
MTW3e) must always on the top.
6. There are no requirements for straight lengths of pipe to
be present at the inlet and outlet of these meters (U0D0).
7. In order to guarantee correct measurement, it is very im-
portant to ensure that no air can enter the water meter or
Volume
Weight
Material
Material no.
Color
336298.63 mm³
973.89 g
that the pipeline is allowed to run dry.
Elektronic
Description
Unico USA
Name
Date
Drawn
TBU
04.06.2019
Checked
Index
Modification
Date
Name
Approved
Doc no.
141649
swiss.smart.simple.
Confidential
Copyright © GWF MessSysteme AG
Part no.
All rights strictly reserved. Reproduction or
issue to third parties in any form whatever is
GWF MessSysteme AG, CH-6002 Luzern
not permitted without written authority of
GWF MessSysteme AG, CH-6002 Luzern
sheet -1 of 1 / A4
8. Excessive force when tightening the couplings/unions of
the water meter must be avoided in order to prevent da-
mage being caused to the housing of the water meter. Fur-
thermore, the water meter must not be used as a lever for
aligning the pipeline.
9. The pipeline should be securely fastened upstream and
downstream of the water meter.
10. The water meter installation should be protected against
mechanical shocks or vibration.
11. It is necessary to purge the pipeline before initial instal-
lation of the water meter. In place of the water meter a
bypass piece must be installed, so that foreign objects do
not block the strainer of the water meter. Thus, accurate
measurement can be ensured.
12. Before installing the water meter, the protective caps must
be removed and it must be ensured that a clean strainer is
installed.
13. Pay attention to the direction of flow when installing the
meter. An arrow on the water meter body indicates the di-
rection of flow.
14. During installation it is important to check that the inside
of the couplings/unions are clean, that the correct seals/
gaskets are used and are intact and correctly positioned.
Whenever a water meter is removed from the pipeline,
discard and replace the old seals/gaskets. Do not use pipe
sealant or PTFE tape on meter threads.
15. The union nuts are placed on the meter thread and tigh-
tened by hand in a first step. In the second step, the union
nut is finally tightened by using a wrench until the connec-
tion is tight.
16. With only an upstream shut-off valve installed
■
Open slowly the shut-off valve to remove air from the
pipeline prior to installation of the meter
■
Once the meter is installed, slowly open a consumer
faucet
■
Close the consumer faucet
■
Observe the meter installation to ensure it is properly
sealed w/o leaks.
With an upstream and downstream shut-off valve installed
■
Close the downstream shut-off valve
■
Open slowly the upstream shut-off valve
■
Observe the meter installation to ensure it is properly
sealed w/o leaks
■
Open slowly the downstream shut-off valve
©
Scale
1:2
Index
0a
Volume
512774.67 mm³
Elektronic
Name
Drawn
TBU
Checked
Index
Modification
Date
Name
Approved
swiss.smart.simple.
Confidential
Copyright © GWF MessSysteme AG
All rights strictly reserved. Reproduction or
issue to third parties in any form whatever is
GWF MessSysteme AG, CH-6002 Luzern
not permitted without written authority of
GWF MessSysteme AG, CH-6002 Luzern
■
Open slowly a consumer faucet to allow entrapped air to
escape from pipeline
■
Close the consumer faucet
17. In order to prevent unauthorized manipulation of the water
meter the couplings/unions must be secured by means of
a wire and seals against tampering.
6. Inspection
GWF water meters are characterized by a long service life. The
duration of use depends essentially on the water quality and
the profile of the flow. We recommend that the meter is exa-
mined for the following points periodically.
1. The water meter and pipeline of the installation should be
checked for leaks.
2. Pay attention that the water meter connections are securely
attached and that all pipelines are undamaged and intact.
Weight
Material
Material no.
Color
1514.83 g
Description
Unico USA Massbilder
Date
29.05.2019
3. It should be verified that all shut-off valves upstream and
Doc no.
Scale
1:1
143174
Part no.
Index
0a
downstream of the water meter are fully opened, and if
sheet -2 of 2 / A2
they can be closed and there are no leaks present.
4. When the water supply is closed, the displayed volume
should stop counting. When the water supply/inlet is slowly
opened the displayed volume should begin to count slowly.
5. Check to see that the environment, in which the water me-
ter is installed, is devoid of water, where dripping water
onto the register could lead to water ingress.
6. The stamp on the seal should be verified if it is intact.
7. It should be verified that the ambient temperature lies wi-
thin the admissible temperature range of the water meter.
8. Check that the meter and surrounding pipework is ade-
quately protected from frost and freezing conditions.
7. Maintenance
As a rule, GWF water meters do not require any maintenance.
If the supply network is subject to dirty conditions, it is recom-
mended, to clean the strainer on the inlet of the water meter
on a regular basis. To do this, the system pressure in the line
must be relieved before starting work.
Basis for the installation, commissioning, monitoring and
maintenance of water meters is the OIML R49 Part 1 - Metro-
logical and technical requirements.
8. Recycling
It should be ensured that the water meters are disposed of
correctly. The local and national regulations for
environmental protection are to be considered,
and products should be recycled where possible.
For electronic water meters that contain electro-
nics and a lithium/manganese battery, the following applies:
■
Never dispose of the devices in household waste
■
If necessary, request test certificates for the batteries used
from the manufacturer.
■
Store lithium/manganese batteries protected from moisture,
do not throw into fire, do not short-circuit, do not open or da-
mage and always keep out of the reach of children.
Volume
Weight
Material
Material no.
Color
512774.67 mm³
1514.83 g
Elektronic
Description
Name
Date
Unico USA Massbilder
Drawn
TBU
29.05.2019
Checked
Index
Modification
Date
Name
Approved
Doc no.
1:1
Scale
143174
swiss.smart.simple.
Confidential
Copyright © GWF MessSysteme AG
Part no.
Index
All rights strictly reserved. Reproduction or
0a
issue to third parties in any form whatever is
GWF MessSysteme AG, CH-6002 Luzern
not permitted without written authority of
GWF MessSysteme AG, CH-6002 Luzern
sheet -1 of 2 / A2
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