GWF Unico2coder MP 3/4 Installation And Operating Instructions

Cold Cold
water water
Installation and Operating Instructions
Unico2coder MP 3/4", MTK3coder MP 1", MTK3coder MP 1½",
MTW3coder MP 1", MTW3coder MP 1½"

1. Field of application

Model
Nominal pipe size
NPSM
Connection
on meter (thread)
Max. flow rate gpm
Max. continuous gpm
flow rate
Min. flow rate gpm
Max. working temp. °F
Max. working psi
pressure
Ambient temp. °F
Interface
Water meters are suited for the measurement of low to middle
flowrates. These instructions contain all important information
for the installation and operation of the above mentioned water
meters. Installation, connection and maintenance must only be
carried out by expert technicians who, first of all, have read and
understood the operating instructions.

2. Sizing of the water meter

Water meters are to be sized according to the relevant rating.
A continuous overload will lead to the water meter being da-
maged. The maximum flow rate may only take place at a ma-
ximum of 1 hour per day and over the life span of the water
meter a maximum of 100 hours summed together. When spe-
cifying the water meter the operating conditions occuring in
the application are to be considered. In particular these are:
■ Max. continuous flow rate
■ Max. working pressure
■
Max. working temperature
■ Ambient temperature
■ Installation position

3. Installation information

1. Singlejet meters (Unico2) can be installed in horizontal or
vertical pipe lines. Preferential is the installation in horizon-
tal pipe lines. The type plate of singlejet meters (Unico2) can
face upwards or sideways.
Multijet meters (MTK3 / MTW3) can be installed in horizontal
pipe lines. The type plate of multijet meters (MTK3 / MTW3)
must always face upwards.
Unico2 MTK3 MTW3
3/4" 1" 1½" 1"
1" 1¼" 2" 1¼"
22 55 88 55
11 44 70 44
0.50 0.75 1.50 0.75
194 122 122 194
230
+41 to +131
GWFcoder
®
©
2. For water meters no inlet and outlet distances must be
adhered to. It is recommended to install the water meter
in a location, that is accessible for reading, service and
inspection.
3. It is recommended to install shut-off valves upstream and
1½"
downstream of the water meter, to facilitate the installati-
2"
on and removal of the water meter for periodic inspection
and maintenance work.
88
70
1.50
194
With only an upstream shut-off valve installed
■ Open slowly the shut-off valve to remove air from the
meter and pipeline
■
Open slowly a consumer faucet to allow entrapped air to
escape from pipeline
■ 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
■
Open slowly a consumer faucet to allow entrapped air to
escape from pipeline
■ Close the consumer faucet
4. It is necessary to purge/rinse the pipeline before initial in-
stallation 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.
5. Pay attention to a stress-free installation of the water
meter and to the direction of flow when installing the water
meter. An arrow on the water meter body indicates the di-
rection of flow.
6. Before installing the water meter check if a clean strainer
is inserted inside the inlet part of the water meter.
7. During installation it is important to check that the inside
of the couplings/unions are clean, intact and correctly po-
sitioned seals/gaskets are used. Whenever a water meter
is removed from the pipe line, discard and replace the old
seals/gaskets. Do not use pipe sealant or Teflon tape on
meter threads.
Volume Weight Material Material no. Color
512774.67 mm³ 1514.83 g
Elektronic Description
Unico USA Massbilder
Name Date
Drawn 29.05.2019
TBU
Checked
Index Modification Date Name Approved
Doc no. Scale 1:1
143174
swiss.smart.simple.
Confidential
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