Install Instructions

IM-MP 724992 1014
5
1.3.1 Viega Smart Connect feature
Viega MegaPress system sizes ½" to 2" incorporate
the Viega Smart Connect feature, which assures
leakageofliquidsand/orgasesfrominsidethe
system past the sealing element of an unpressed
connection. The function of this feature is to
provide the installer quick and easy identification
of connections that have not been pressed prior to
putting the system into operation.
Press systems without the Viega Smart Connect
feature may not leak initially; however, they may
unseat during future system operation. The Viega
Smart Connect feature is designed to protect from this
potential risk. See Figure 1.2.
The Viega Smart Connect feature is a quick and easy
way for installers to identify connections that need to
be pressed. Testing for leaks using the Viega Smart
Connect feature is not a replacement for testing to the
requirements of local codes or standards.
1.3.2 Testing
All system testing shall be carried out in accordance
with the local code or authority having jurisdiction.
Viega recommends air testing of gas systems to be a
minimum of ½ psi.
1.3.3 Sealing elements
The Viega MegaPress system is available with the
following factory-installed sealing elements:
Viega MegaPress EPDM Sealing Element
Operating temperature: 0°F to 250°F (-18°C to 120°C)
This sealing element is used mainly in the applications
of hydronic heating, chilled water and fire sprinkler
installations. EPDM, or ethylene-propylene-diene
monomer, is shiny black in color. The EPDM
sealing element is a synthetically manufactured and
peroxidically cross-linked general purpose elastomer
with a wide range of applications.
The EPDM sealing element possesses excellent
resistance to aging, ozone, sunlight, weathering,
environmental influences, alkalis and most alkaline
solutions and chemicals used in a broad range
of applications.
Viega MegaPressG HNBR Sealing Element
Operating temperature: -40°F to 180°F (-40°C to 82°C)
This sealing element is used mainly for fuel gas
applications (not in the liquid state). HNBR, or
Hydrogenated Nitrile Butadiene Rubber, is yellow in
color for easy identification.
With its excellent performance for the most
demanding of applications, HNBR is the ideal choice
for applications that require excellent physical
properties,aswellasoiland/orchemicalresistance.
1 Identify an unpressed connection during
pressure testing when water flows past the
sealing element.
2 Upon identification, use the Viega MegaPress
tool to press the fitting, making a permanent
leak-proof connection.
3
Viega MegaPress connections are fast,
flameless and reliable.
Figure 1.2 Smart Connect feature