Easytop Inox backflow preventer with SC-Contur
Product information
Easytop Inox backflow preventer with SC‑Contur
for drinking water installation
| Year built (from): | 2017. 04. 01. |
Trade mark rights exist for this document, further information can be found at viega.com/legal .
Target groups
The information in this manual is directed at heating and sanitary professionals and trained personnel.
It is not permitted for individuals without the abovementioned training or qualification to mount, install and, if required, maintain 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.
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.
INFO!
Notes give you additional helpful tips.
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 relevant national laws, standards, regulations, directives and other technical provisions take priority over the German/European directives specified in this manual: The information herein is not binding for other countries and regions; as said above, they should be understood as a recommendation.
Standards and regulations
The following standards and regulations apply to Germany / Europe. National regulations can be found on the relevant web site of your country at viega.com/standards .
Regulations from section: Fields of application
Regulations from section: Media
Regulations from section: Product description
Regulations from section: Overview
Regulations from section: Marking on components
Regulations from section: Compatible components
Regulations from section: Corrosion
Regulations from section: Leakage test
Regulations from section: Maintenance
Intended use
INFO!
Coordinate the use of the model for areas of use and media other than those described with the Viega Service Center.
Areas of use
Use is possible in the following areas among others:
Drinking water installations
Industrial units
The general rules of engineering and the applicable regulations must be observed for planning, execution, operation and maintenance of drinking water installations, see Regulations from section: Fields of application .
Media
The model is also suitable for the following media, amongst others:
Drinking water without limitations acc. to the applicable directives, see Regulations from section: Media
maximum chloride concentration 250 mg/l pursuant to applicable regulations, see Regulations from section: Media
Product description
According to the applicable regulations, Easytop system fittings can be used for all types of drinking water and are DVGW certified, see Regulations from section: Product description . Their plastic components comply with the KTW recommendation and the requirements pursuant to the applicable regulations.
Overview
INFO!
The Easytop system fittings comply with the test requirements specified in the applicable regulations, see Regulations from section: Overview . Sound protection Lap≤ 20 dB(A)
The model is equipped as follows:
valve casing made of stainless steel
valve top made of stainless steel (dead space free)
dual-sided press connection with SC‑Contur
backflow preventer (BP)
- Entleerungs- / Prüfstopfen
drainage / testing plugs G¼ upstream and downstream from the backflow preventer
key surface on the casing
valve and spindle seal made of EPDM (maintenance-free)
Backflow preventer
The model is fitted with a backflow preventer.
Backflow preventers only allow flowthrough in one direction (in the direction of flow). If the direction of flow changes, e. g. due to back suction, the backflow preventers close automatically.
The model is available in the following dimensions: d 15 / 18 / 22 / 28 / 35 / 42 / 54.
Press connection with SC-Contur
The press connection has a circumferential bead in which the sealing element lies. The connector is deformed upstream and downstream of the bead and permanently connected to the pipe during pressing. The sealing element is not deformed during pressing.
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.
Viega guarantees that unpressed connections are visible during a leakage test:
with wet leakage test in the pressure range from 0.1 hPa–0.65 MPa (1.0 mbar–6.5 bar)
with dry leakage test in the pressure range from 22 hPa–0.3 MPa (22 mbar–3.0 bar)
Sealing elements
Area of use of the EPDM sealing element
NOTICE!
Only EPDM sealing elements are approved in drinking water installations. The use of other sealing elements is not permitted.
The model is factory-fitted with EPDM sealing elements.
Area of use |
|---|
Use |
Operating temperature [Tmax.] |
Operating pressure [Pmax] |
Comments |
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:
flow direction indicator
noise class I pursuant to applicable regulations, see Regulations from section: Marking on components
dimension
DVGW writing
green dot for drinking water
EA marking for classification in accordance with the applicable regulations, see Regulations from section: Marking on components
Compatible components
The model is equipped with press connections and compatible with the Sanpress and Sanpress Inox system.
Pipes
The press connections are tested and approved pursuant to the applicable regulations with the following pipe types:
Stainless steel pipes (material 1.4401 / 1.4521)
Operating mode
Combined backflow preventer (CBP)
Backflow preventers protect fittings and installation systems against unintended backflow, back pressure or back suction of the contaminated wastewater or dirty water in the piping system. This can occur after pressure fluctuations in the distributor circuit, which can cause a change in the direction of flow.
The backflow preventer prevents the pushing back, backflow or back suction of liquids, which may be a health hazard, into the public drinking water network, with the help of a spring-loaded valve cone. The dimension is dependent on the peak pressure and it complies with the nominal width of the pipeline. The backflow preventer must be fitted with testing equipment.
In many countries, standards and technical guidelines stipulate the use of backflow preventers or other suitable safety equipment that protect drinking water against contamination.
Technical data
Observe the following operating conditions for the installation of the model:
Operating temperature [Tmax] |
|---|
Operating pressure [Pmax] |
The performance diagram shows the pressure losses (in hPa) in relation to the volume flow and the nominal width.
Information for use
Corrosion
Overground pipelines and fittings in rooms do not normally require external corrosion protection.
There are exceptions in the following cases:
Contact with aggressive building materials such as nitrite or materials containing ammonium
in aggressive surroundings
If external corrosion protection is required, observe the pertinent guidelines, see Regulations from section: Corrosion .
INFO!
Easytop fittings made of stainless steel are suitable for all types of drinking water.
The chloride concentration in the medium must not exceed a maximum value of 250 mg/l.
This chloride is not a disinfectant, but in fact pertains to the content in sea and table salt (sodium chloride).
Optional accessories
The following optional accessories are available:
Drainage valve
Extension for drainage valve when using an insulating shell
Insulating shells
Insulating shells
EPS insulating shells are available for all sizes of valves. The two-piece shells are self-securing and mounted with tools and holding clamps: they connect seamlessly onto the flat surface of the pipe insulation. When installing a drainage valve or an extension with drainage valve, a predetermined breaking point is broken out of the insulating shell.
Handling
Assembly information
Permitted exchange of sealing elements
INFO!
Important instruction
With their material-specific qualities, sealing elements in press connectors are adapted for use with the corresponding media and/or the areas of use of the piping systems and are generally only certified for them.
The exchange of a sealing element is generally permitted. The sealing element must be exchanged for a designated spare part for the intended application Sealing elements . The use of other sealing elements is not permitted.
Mounting instructions
Checking system components
INFO!
Do not remove the model from the packaging until immediately before use.
System components may, in some cases, become damaged through transportation and storage.
Check all parts.
Replace damaged components.
Do not repair damaged components.
Contaminated components may not be installed.
During assembly
Observe the following when mounting:
flow direction indicator
use suitable tools
INFO!
Choose the place of installation so that the fitting is easily accessible, simple to operate and the insulating shell can be well mounted.
Laying and fixing pipes
For information, refer to the instructions for use of the Sanpress and Sanpress Inox systems.
Length expansion
For information, refer to the instructions for use of the Sanpress and Sanpress Inox systems.
Required tools
The following tools are required for production of a press connection:
pipe cutter or a fine-toothed hacksaw
deburrer and coloured pen for marking
press machine with constant pressing force
press jaw or press ring with corresponding adapter jaw, suitable for the pipe diameter and suitable profile
Recommended Viega press machines:
Pressgun 5
Pressgun Picco
Pressgun 4E / 4B
Picco
Type PT3-AH
Type PT3-H / EH
Type 2 (PT2)
Assembly
Replacing the sealing element
Removing the sealing element
INFO!
Do not use pointed or sharp-edged objects to remove the sealing element. These could damage the sealing element or bead.
-
Remove the sealing element from the bead.
Inserting the sealing element
-
Insert a new, undamaged sealing element into the bead.
-
Ensure that the complete sealing element is in the bead.
Shortening the pipes
NOTICE!
Leaky press connections due to damaged material!
Press connections can become leaky due to damaged pipes or sealing elements.
Observe the following instructions to avoid damage to pipes and sealing elements:
Do not use cutting discs (angle grinders) or flame cutters when cutting to length.
Do not use grease or oils (e. g. cutting oil).
For information about tools, also see Required tools .
-
Cut the pipe properly using a pipe cutter or fine-toothed hacksaw.
Avoid grooves on the pipe surface.
Pressing the connection
NOTICE!
Leaky press connections due to pipes being too short
If two press connectors are to be mounted onto a pipe without an interval, the pipe must not be too short. If the pipe is not inserted up to the prescribed insertion depth in the press connector during pressing, the connection may become leaky.
With pipes with a diameter of d 15–28 mm, the length of the pipe must be at least as long as the total insertion depth of both press connectors.
Requirements:
The pipe end is not bent or damaged.
The pipe is deburred.
The correct sealing element is in the press connector.
EPDM = polished black
The sealing element is undamaged.
The complete sealing element is in the bead.
-
Push the press connector onto the pipe as far as it will go.
-
Mark the insertion depth.
-
Place the press jaw onto the press machine and push the retaining bolt in until it clicks into place.
INFO!Observe the press tool instruction manual.
-
Open the press jaw and place at a right-angle onto the connector.
-
Check the insertion depth using the marking.
-
Ensure that the press jaw is placed centrally on the bead of the press connector.
-
Carry out the pressing process.
-
Open and remove the press jaw.
-
Connection is pressed.
Leakage test
The installer must perform a leakage test before commissioning.
Carry out this test on a system that is finished but not yet covered.
Comply with the general rules of engineering and the applicable directives, see Regulations from section: Leakage test .
Document the result.
Maintenance
NOTICE!
Inform your customer or the operator of the drinking water installation that the system has to be maintained on a regular basis.
Observe the applicable regulations for the operation and maintenance of drinking water installations, see Regulations from section: Maintenance .
INFO!
Viega recommends actuating the fitting regularly and checking its function.
Disposal
Separate the product and packaging materials (e. g. paper, metal, plastic or non-ferrous metals) and dispose of in accordance with valid national legal requirements.