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You will obtain best detection and maximum false alarm
protection by observing the following rules:
A. Select the location carefully: Mount the GLASSTECH in the
same room with the protected glass pane, preferably on a wall
facing the glass, or on an adjoining wall or on the ceiling.
B. Do not mount the detector on the same wall as the
protected glass pane.
C. Observe room size limits: Avoid installation in rooms larger
than 15 x 15 meters (45 x 45 ft) and sites where the ceiling is
higher than 4.5 m (15 ft).
IMPORTANT: Adding detectors in a room larger than
specified will not overcome this limitation.
D. Do not install too close to the glass: Mount the detector at
least 1.2 m (4 ft) away from the protected glass, or from any
wall with glass.
E. Do not install in rooms smaller than 3 x 3 m (10 x 10 ft): It
would be impractical to install in display windows or display
cases (that have two or more flexible walls - glass, plywood,
plexiglass).
F. Keep away from noise sources: Electrical power cables, air-
conditioners, air compressors, blowing air ducts, and loud
noise sources such as powerful speakers, doors etc.
G. Avoid installation in room corners: Room corners are not
an ideal mounting location, especially if the protected glass is
smaller than 30 x 60 cm (1 x 2 ft).
H. Do not install at all in very noisy areas: Avoid small
kitchens and rooms with noisy machinery or production.
Multiple sound sources create a difficult environment for glass
break detectors.
I. Select a stable mounting surface: Brick and concrete walls
are ideal, drywall is also suitable.
J. Ensure an obstacle-free sound path: A direct line between
detector and protected glass is very important - detection
around corners cannot be guaranteed. Internal wooden
shutters in the sound path may prevent detection.
K. Never ignore sound muffling, lined or insulated drapes:
All these could adversely affect the detector's performance.
L. Beware of damp places: The unit is not sealed and may fail
to function due to excess moisture.
M. Use a swivel bracket if required: Two optional brackets are
available (see Paragraph 3.6).
Additional points to consider:
A. GlassTech is designed to detect shattering of glass framed in an
outside wall. Breaking unframed glass (bottles, plates etc.)
within the room will be identified as a false alarm.
B. GlassTech is not designed to detect the breaking of any type of
hinged glass doors. Do not use it for this purpose.
C. Despite the GlassTech's high degree of sophistication, in rare
cases and under specific conditions, certain noise bursts can
duplicate the sound image of window glass breakage.
D. The GlassTech is not intended to detect events such as glass
cracking by applying slow pressure or glass breaking by drilling
or firing bullets at the glass. Glass break detectors should be
backed up by interior detectors.
E. The GlassTech is not guaranteed to detect window breakage if
any type of plastic film is adhered to the inside surface of the
glass.
F. The GlassTech is not guaranteed to detect double-glass
window breakage.
G. Before running any wiring, we recommend to mount the detector
temporarily at the chosen location, power it up from a 9 or 12
volt battery and test the effective detection range with a glass
break sound simulator (as instructed in Para. 4.2). The test can
be repeated several times in several locations until the optimum
mounting point is determined.
3.2 Disassembling the Detector
To disassemble the detector proceed as follows:
A. Pry loose one side of the trim strip, with a fingernail or a small
screwdriver. If the trim strip doesn't come loose easily, try the
other side. Remove the trim strip and save it for later use.
B. Remove the screw that fastens the front cover to the base and
take the cover off.
2
C. Insert a screwdriver blade into the slot at the right side of the
PCB (see Figure 5) and dislodge the printed circuit board from
the right-side retaining tab. Remove the printed circuit board
and put it aside carefully.
Note: for surface mounting, refer to Para. 3.3 below. For flush
mounting, refer to Para. 3.4 below. Then finish as directed in 3.5
below.
3.3 Surface Mounting
The unit can be mounted directly on a flat surface or on an
optional swivel bracket (see Paragraph 3.6). Use countersunk
head screws (supplied) through the two holes in the base to
attach the base firmly to the wall or to the ceiling. Be sure to pass
the wires into the base through the wiring inlet. If the wires are
routed down from the ceiling, use the vertical wiring channel at
the rear of the base. Then carry on as directed in paragraph 3.5.
3.4. Flush Mounting
An adapter box, a decorative frame and 4 screws are included in
the GTFK kit for installation in plastic single-gang electrical switch
boxes (see Figure 3 and Section 2 for details). Having dis-
assembled the detector, proceed as follows:
A. Attach the detector's base to the adapter box, using two short,
countersunk head screws (not shown in Figure 3) through
the holes in the base into the two plastic standoffs in the
adapter box.
Figure 3. GlassTech -F and -AM/F, Installation with GTFK
B. Fit the adapter box, with the detector base mounted inside,
into the single-gang box already recessed into the wall. Be
sure to pass the wires into the base through the wiring inlet.
C. Fasten the adapter to the single-gang box with the two conical
head screws through the top and bottom extensions. Then
carry on as directed in Para. 3.5.
3.5 Mounting - Final Procedure
A. Push the detector's printed circuit board into the base, until it
snaps into place, held firmly by the retainer tabs at both sides.
(Fig. 2)
B. Set the jumpers as required for the particular installation (see
Para. 3.7).
C. Complete the wiring as described in Para. 3.8.
D. Remount the front cover. Fasten it with the screw and push
the trim strip back into place. In flush mountings, fit the
decorative frame over the entire assembly and push it in until
it clicks into place.
(GlassTech & GlassTech-AM)
Figure 2. GlassTech - Exploded View
(GlassTech-F & GlassTech-AM/F)
DE1896
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