Instructions for installation of ROBAX® fireplace viewing

Instructions for installation of ROBAX® fireplace viewing
Instructions for installation of ROBAX® fireplace
viewing panels
General information
1
1.Even under thermal load, ROBAX® glass-ceramic panels show near-zero
thermal expansion. For this reason the different thermal expansion of the
various framing materials in proportion to the ROBAX® panel must be taken
into account in the design of the entire heating device.
∆ℓ
Metal
2. Additionally, the limitations of manufacturing tolerances of the frame and
glass-ceramic panel should be considered.
ROBAX®
3.Contact pressure that leads to bending stress on the panel must be
eliminated. This can be achieved, for example, by limiting torque, or with
an arrester which limits screw-in depth.
4. Since slight twisting of the frame construction cannot be controlled, a
thermally stable, permanently elastic seal (e.g. fiberglass reinforced or
mineral-fiber reinforced) should be used to prevent the frame coming in
contact with the ROBAX® panel.
T [°C]
6
Panel
5.If the frame is required to touch the glass ceramic panel due to design
reasons, then the contact pressure must be evenly distributed (never at
single points) over the circumference of the panel.
Frame
6. The panel must not come into direct contact with metal frame parts. It is
recommended to use a thermally stable, permanently elastic seal.
7.Seal manufacturer instructions must also be followed, in particular with
regard to contact pressure of materials.
8.During installation, it is essential to protect the glass-ceramic panel,
specifically the edges from potential damage (blows, bumps and scratches).
9.If a high-temperature-resistant silicone is applied to the circumference of
the panel, the elastic limit of the silicone must be considered. Due to the
excellent bonding properties of glass-silicone, exceeding the limit can lead
to cracked or broken windows.
8
Sealing
Instructions for installation of ROBAX® fireplace
viewing panels
Frameless installation
2
The main hazards that could arise when installing ROBAX® glass ceramic
doors without a frame are mechanical stresses (bending stress, blows,
bumps etc.). Other essential general instructions that remain applicable and
must be taken into account in the design of a frameless door can be found
under the “General information” section.
1. The weight of the panel should be supported by a sufficiently dimensioned
frame. The pressing forces transmitted from the frame to the glass ceramic
must be absorbed by a suitable and temperature-stable material that is also
flexible (e.g. glass-fiber cord between hinge/handle and window).
Screw
Husk
Metal
Panel
2. Pressure points, caused for example by the weight of the window „resting“
on the screws/lead-throughs, should be kept to a minimum; e.g. with threaded
sleeves which at the same time prevent unacceptable glass-metal contact.
3.Bore diameter in the ROBAX® panel must allow for thermally-induced
expansion of metal components (lead-throughs, mounting rails etc.).
Additionally, bore edges must be of sufficient quality and be beveled on
both sides. Panel edges should be ground.
3
4. Closing the door must not generate any additional forces (lever) on the
hinged side.
5. Hinges must not jam when closing, since the resisting force produced by
closing or opening the door could transmit excessively high stress to the
glass ceramic.
7.Instructions for the location of bore holes can only be provided when the
specific panel and design are known.
Home Tech
SCHOTT AG
Hattenbergstrasse 10
55122 Mainz
Germany
Phone: +49 (0)6131/66-25431
Fax: +49 (0)3641/2888-9162
info.robax@schott.com
www.schott.com/robax
6
80229 ENGLISH 12130.5 ali/ben Printed in Germany
6. Bending forces, which are exerted when the panel is latched, depend largely
on the position of the bore holes for the latching mechanism and the pressingon force needed for latching, and which is exerted by the user. Rigidity is not
an issue, provided that the required pressing-on force exerted on the panel
does not exceed 40 N.
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