Grundfix Plus-Control – Modell 4987.41
69
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Replacement parts
Model
Art.-No.
Size
Product description
4987.52
471088
Battery
for Grundfix Plus control from year 2000 onwards
4987.42
667832
Control and alarm equipment
consisting of
– LCD for displaying text and 3-button control
– Optical-acoustical status signal
– Self-testing every 24 h
– Emergency battery operation during mains power failure
4987.47
633974
Microfuse
for control from year 2000 onwards
4987.6
483500
Cable set 20 m
– Connection cable
– Pressure hose
– Conduit
4987.418
667 849
667 856
DN 100/125
DN 150
Lid
consisting of
– pressure switch
– Motor drive
– Motor spindle
– Motor-driven flap mechanics
4987.49
321 932
321 949
DN 100/125
DN150
Maintenance set
for the Grundfix Plus and
Grundfix Plus Control backflow valves
4987.443
364 885
364 892
DN 100/125
DN 150
Partition
with flap (manual)
4987.444
364 908
364 915
DN 100/125
DN 150
Partition
with flap (motor-driven)
Assembly
Functional principle of the backflow prevention device
During normal operation, the backflow valves are open. If the pressure switch registers backflowing water, the motor-driven flap is
closed, the display will show the message "Back pressure" and an alarm will sound every 10 seconds.
The use of drainage fittings is not possible during this time.
A battery-powered emergency power supply guarantees the functionality of the system even if the 230V power network fails. With
the emergency closing device, the system can be manually closed, irrespective of the motor-driven flap.
C
Example of installation - residential building in accordance with DIN EN 12056
The connection of the upper floor
to the ground pipe must take place between the backflow valve and sewer within the
building
– this is the only way to guarantee flawless function of the sewage system. So that drainage can be ensured in the long-
term, backflow valves must not be used as the central safety device of a building with drainage fittings installed above the backflow
level
– in case of backflow, the building would flood due to non-draining wastewater
.
Backflow prevention devices and their control units must be installed so that they can be reached and accessed at all times.
Street = backflow level
Area safe from backflow
Upper floor connection
Area at risk of backflow
Protection against backflow due to
Grundfix Plus Control
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