Viega 2648S User manual
for double-pipe gas meters
Model Year built:
2648S from 02/2009
en_INT
Profipress G mounting unit
Instructions for Use
Profipress G mounting unit 2 from 19
Table of contents
1About these instructions for use 4
1.1 Target groups 4
1.2 Labelling of notes 4
1.3 About this translated version 5
2Product information 6
2.1 Intended use 6
2.1.1 Areas of use 6
2.1.2 Media 6
2.2 Product description 6
2.2.1 Overview 6
2.2.2 Press connection with SC-Contur 8
2.2.3 Sealing elements 9
2.2.4 Markings on components 9
2.2.5 Compatible components 10
2.2.6 Operating mode 10
2.2.7 Technical data 12
2.3 Information for use 13
2.3.1 Corrosion 13
3Handling 14
3.1 Assembly information 14
3.1.1 Mounting instructions 14
3.1.2 Required tools 14
3.2 Mounting 15
3.2.1 Mounting the wall bracket 15
3.2.2 Shortening the pipes 16
3.2.3 Pressing the connection 16
3.2.4 Leakage test 18
3.3 Maintenance 18
3.4 Disposal 19
Table of contents
Profipress G mounting unit 3 from 19
1 About these instructions for use
Trade mark rights exist for this document, further information can be
found at www.viega.com/legal-notices.
1.1 Target groups
The information in this instruction manual is directed at the following
groups of people:
nContract installers registered in the installers' register of a utility
company
nprofessional specialist companies for the construction, maintenance
and alteration of a natural or liquid gas system
Liquid gas systems may only be constructed, maintained or altered by
companies that have the necessary qualification and experience.
It is not permitted for individuals without the abovementioned training or
qualification to mount, install and, if required, service this product. This
restriction does not extend to possible operating instructions.
The installation of Viega products must take place in accordance with
the general rules of engineering and the Viega instructions for use.
1.2 Labelling of notes
Warning and advisory texts are set aside from the remainder of the text
and are labelled with the relevant pictographs.
DANGER!
This symbol warns against possible life-threatening injury.
WARNING!
This symbol warns against possible serious injury.
CAUTION!
This symbol warns against possible injury.
NOTICE!
This symbol warns against possible damage to property.
About these instructions for use
Profipress G mounting unit 4 from 19
Notes give you additional helpful tips.
1.3 About this translated version
This instruction for use contains important information about the choice
of product or system, assembly and commissioning as well as intended
use and, if required, maintenance measures. The information about the
products, their properties and application technology are based on the
current standards in Europe (e. g. EN) and/or in Germany
(e. g. DIN/DVGW).
Some passages in the text may refer to technical codes in Europe/
Germany. These should serve as recommendations in the absence of
corresponding national regulations. The pertinent national laws, stand-
ards, regulations and guidelines, as well as other technical guidelines,
have priority over German/European guidelines in this manual: The
information is not binding for other countries and territories and should,
as mentioned, be considered as support.
About these instructions for use
Profipress G mounting unit 5 from 19
2 Product information
2.1 Intended use
The use of the model for areas of use and media other than
those described must be approved by the Viega Service
Center.
2.1.1 Areas of use
Use is possible in the following areas among others:
nGas installations
nLiquid gas systems
The general rules of engineering must be observed for planning, execu-
tion, alteration and operation gas installations.
E. g. the following regulations apply:
nDVGW-TRGI 2008 for gas installations
nDVFG-TRF 2012 for liquid gas systems
2.1.2 Media
The model is suitable for the following media, amongst others:
nGases
in acc. with DVGW Worksheet G 260
nLiquid gases, only in the gaseous state for domestic and commercial
applications
in acc. with DVGW-AB G 260
2.2 Product description
2.2.1 Overview
Viega gas fittings conform with the requirements of
DIN EN 331. The gas fittings are tested and certified in
accordance with the following criteria by the DVGW:
–
Leak tightness in acc. with 3537-1
–
higher thermal resistance (HTR)
Product information
Profipress G mounting unit 6 from 19
The model is equipped as follows:
nInlet side gas ball valve with Profipress G press connection with SC-
Contur, casing made of brass
nOutlet side with Profipress G press connection with SC-Contur
ndual-sided gas ball valve screw fitting with thread G 1¼
nWall bracket with fixing set
nGas flow monitor (GFM)
The gas meter is screwed onto the gas meter screw fittings G 1¼.
The model is lead-sealable and, in addition, can be locked using a com-
mercially available padlock.
The yellow protective sleeve on the actuating lever shows the medium
to be gas.
A gas flow monitor (GFM) type K is integrated into this model. A power
match across the protectable length is not required when a gas flow
monitor type K is installed in metallic pipelines.
You can find more detailed information about the GFM in the technical
data about the GFM
ÄChapter 2.2.7 „Technical data“ on page 12
.
The model is available in the dimension d 28 with the following GFM:
VGas 2.5 m3/h / 4.0 m3/h / 6.0 m3/h.
Product information
Profipress G mounting unit 7 from 19
2.2.2 Press connection with SC-Contur
Fig. 1: Press connection using a press connector as an example
The press connection has a circumferential bead in which the sealing
element lies. The connector is deformed in front of and behind the bead
and permanently connected to the pipe during pressing. The sealing
element is not deformed during pressing.
Fig. 2: SC-Contur
Viega press connections are equipped with the SC-Contur. The SC-
Contur is a safety technology that is certified by the DVGW and ensures
that the connection is guaranteed to be leaky in an unpressed state. In
this way, unpressed connections are noticed immediately during a
leakage test.
SC-Contur
Product information
Profipress G mounting unit 8 from 19
Viega guarantees that unpressed connections are visible during a
leakage test:
nwith dry leakage test in the pressure range from 22 hPa–0.3 MPa
(22 mbar–3.0 bar)
2.2.3 Sealing elements
The gas meter threaded connections are equipped with nyhalit seals.
The seals are higher thermal resistant (HTR).
The nyhalit seals may only be used once. The seals in the
meter threaded connections must be exchanged when
replacing a gas meter (model G2932).
The press connections are factory-fitted with yellow HNBR sealing ele-
ments.
Use Gas installation Liquid gas installation
Operating tempera-
ture
-20 °C up to +70 °C -20 °C up to +70 °C
Operating pressure ≤0.5 MPa (5 bar)
(MOP 5)
≤0.1 MPa (1 bar)
(HTR / GT1)2)
≤0.5 MPa (5 bar)
(MOP 5)1)
≤0.1 MPa (1 bar)
(HTR / GT1)2)
1) Maximum pressure – equates to the pick-up pressure of the SAV in
the pressure regulating valve
2) Operating pressure at HTR requirement max. 0.1 MPa (1 bar) (GT1)
In acc. with DIN EN 331 the scope of the operating temperature is
between -20 °C and max. +60 °C.
2.2.4 Markings on components
The press connections are marked with a coloured dot. This identifies
the SC-Contur, where the test medium would escape in the case of an
inadvertently unpressed connection.
The model is marked as follows:
nMOP5 for maximum operating pressure 0.5 MPa (5 bar)
nGT1 for operating pressure with HTR requirement max. 0.1 MPa
(1 bar)
nFlow direction indicator
nDWGW writing
Product information
Profipress G mounting unit 9 from 19
nHTR marking
nyellow dot and yellow rectangle for gas
The protective sleeve on the actuating lever is marked with the following
information about the GFM:
nManufacturer
nGFM Type
nNominal flow
nOperating pressure range
nPosition indicator
nDVGW-G
2.2.5 Compatible components
The model is compatible with the following systems:
nProfipress G
nSanpress Inox G
Profipress G gas fittings are equipped with press connections.
The press connections are tested and certified with the following types
of pipe in accordance with DVGW Worksheet G 5614:
nCopper pipes
– in acc. with DVGW Worksheet GW 392
– in acc. with DIN EN 1057
nStainless steel pipes (material 1.4401)
– in acc. with DVGW Worksheet GW 541
– in acc. with DIN EN 10088
Profipress G gas fittings may only be connected to the San-
press Inox stainless steel pipe (material 1.4401) up to
dimension 28 mm.
Please contact the Viega Service Center for questions on this subject.
2.2.6 Operating mode
A gas flow monitor is an active protective measure in a gas installation.
A GFM interrupts the flow of gas if an unintended release of gas occurs.
The GFM is tested in acc. with DVGW-VP 305-1.
GFM specification plate
Fig. 3: Protective sleeve on the actuating
lever
Gas flow monitor (GFM)
Product information
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Table of contents
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