FONA XDG –Service & Installation Manual
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3. ASSEMBLY AND INSTALLATION
3.1 Wall Mounted Systems
3.1.1 Installation Options
The timer box can be mounted together with the X-ray head on the right of the wall adaptor or can be
placed remote either inside or outside the examination room. The release hand-switch can be directly
connected to the timer box or placed remote making use of specific mounting kit including 10 m cable. A
door contact and/or a second exposure button can be added via the internal socket on the timer board.
3.1.2 Unpacking
Unpack the components of the system and check the following:
AEach item is in good conditions and was not damaged during
transportation.
BAll the items for the desired system configuration are available.
CThe line voltage on the labels of timer and X-ray head are
corresponding to the local line voltage.
3.1.3 Structural Requirements
The wall adaptor has to be mounted in a convenient position on left or
right side of the chair or on back wall (head of the patient).
The maximum useful reach is of 208 cm (81.9”) from the wall when using
an 100 cm (39.4”) support arm.
The wall adaptor can be mounted with 2, 4, or 6 bolts, depending on wall
quality.
ATwo bolts only (top and bottom central holes –T2, B2) are used when
there is a solid slim column (e.g. iron mounting) with weak sides (e.g.
wooden wall). Considering the requested safety factor, the top bolt
has to withstand a load of 8878 N, comprehensive of a safety factor,
i.e. about 2013 lbs or 906 kg. Proper screw to be selected for a solid
connection to the wall. Classes ISO 8.8 (M 8, M 8x1, M 8x1.25) or SAE
Grade 5 (5/16” 18UNC, 5/16” 24 UNF) are recommended.
BFour bolts, two on top sides (T1, T3) and two on bottom sides (B1,
B3) is the regular mounting for solid (concrete) wall, but also on large metal plate. Considering the
requested safety factor, each bolt at top has to withstand a load of 4439 N, comprehensive of a safety
factor, i.e. about 1007 lbs or 453 kg.
Proper expansion screw to be selected for a solid connection to the concrete wall; the permissible load
of each screw has to be greater than 308 lbs (about 140 kg).
On solid concrete use heavy duty metal anchors.
On hollow bricks use injection chemical fixing.
CSix bolts, three on top (T1, T2, T3) and three at bottom (B1, B2, B3) are required when the wall is not
solid enough and the load has to be distributed on more points. Considering the requested safety
factor, each bolt at top has to withstand a load of 2959 N, comprehensive of a safety factor, i.e. about
671 lbs or 302 kg.
In case the wall is not in condition to withstand the indicated load, corrective actions can be evaluated by
adoption of reinforcing plates:
DLarge plate to fit vertical supports at 16” distance, with 4 mounting holes and one cable opening for
the wall mount in the middle.
EIn case of a thin (wooden) wall not solid enough, the use of a steel counter plate 2 mm thick can be
the solution. Make sure that the wall is solid enough to carry the load.
FThe use of two reinforcing steel plates of about 4 times the surface of the wall adaptor, one by each
side of the wall, can help when a single plate looks not adequate; additional bolts have to be used to
hold together the two plates.
Make sure that the wall is solid enough to carry the load.
INSUFFICIENT WALL OR HARDWARE STRENGHT MAY CAUSE THE WALL ADAPTOR TO
PULL OUT FROM THE WALL AND THE FULL SYSTEM TO FALL ON TO THE PATIENT OR
THE OPERATOR CAUSING INJURIES.
