AEG RMB954E9VX Manuel De L'utilisateur page 22

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Maintenance Instructions for
Check Valve
Backflow preventers are dynamic
components and therefore subject to
wear. In accordance with DIN EN 806-5:
2012, backflow preventers of the type
EA or EC are to be maintenanced by a
regular annual inspection. Please also
take individual national regulations into
consideration.
Inspection
During inspection the following points
should be checked:
• Is the determination of the risks, for
the tapping points connected to the
backflow preventer,unchanged to the
technical rule DIN EN 1717 section
5, so that the backflow preventer is
still suitable for securing the supply
• Cleanliness around
• No leakage, corrosion or damage
• Meets installation requirements
• Accessibility
Installation Guidelines for
Check Valve
The backflow preventer can be
installed in any position. However, it is
advantageous to install it in a horizontal
pipeline with the test opening facing
downwards. In this installation position,
optimum drainage is guaranteed. It is
important to ensure good accessibility for
the periodic inspection and maintenance.
Assembly Instruction for Swivel Nuts
In order to avoid damage to the swivel
nuts or leaks in the screw connections,
please follow these assembly
instructions.
• Place the swivel nut straight onto the
thread of the male counterpart.
• Tighten the swivel nut to a torque of
3 Nm.
• Make sure that the metal ring is
correctly seated on the toothed part
of the swivel nut.
• Check the installation for leaks.
• Repeat the leakage check at
suitable intervals.
• Only use original seals and spare
parts from A. u. K. Muller.
After the installation of the backflow
preventer, the tightness should be
checked.
In addition, a shut-off device (e.g. shut-
off valve series 52.009.100/~200) should
be provided to ensure the devices can be
safely checked.