Mounting Brackets
Install a ceiling or wall bracket for both the receiver and
transmitter so that when mounted, the receiver and the
transmitter will be at approximately the same height. Each
ceiling bracket is composed of two parts that should be as-
sembled with inside part between the ceiling and outside
part as shown in Figure 5. The brackets should be mounted
so that the slot in the front of each bracket is facing the
other bracket. Mount the brackets only on solid structures
of the building. To avoid unwanted alarms due to wall
movement, do not mount to flexible walls, such as sheet
metal walls (see MOUNTING LOCATIONS). Mount brack-
ets with a separation of at least 30 feet but not more than
330 feet.
Figure 6. Ceiling mouting bracket assembly:
CEILING
SCREWS
SLOT IN FRONT
OF BRACKET
OUTSIDE
PART
INSIDE
PART
CEILING
A78-2041-01
;
;
Concrete
or Brick
Good Mounting
Surface
Poor Mounting
Surface
Sheet
Metal
Poor Mounting
Surface
Good Mounting
Surface
Figure 5. Good and poor mounting surfaces:
A78-2652-00
Wiring Installation Guidelines
Always install all wiring in compliance with the National
Electrical Code, and/or the applicable local codes, and any
special requirements of the local authority having jurisdic-
tion. Proper wire gauges and suitable means for strain relief
should be used. The conductors used to connect beam
smoke detectors to control panels and accessory devices
should be color-coded to reduce the likelihood of wiring er-
rors. Improper connections can prevent a system from re-
sponding properly in the event of a fire.
Installation wire used for the beam detector shall be no
smaller than 18 gauge (1.0 square mm). For best system
performance, all wiring should be twisted pair and in-
stalled in separate grounded conduit. Do NOT mix fire sys-
tem wiring in the same conduit as any other electrical
wiring. Shielded cable may be used to provide additional
protection against electrical interference.
When installing the beam smoke detector in applications
where flexible conduit will be used the BMB Beam Mount-
ing Bracket kit must be installed with the cable before wir-
ing the unit, as per the instructions supplied with the kit.
For applications that require flexible conduit to be mounted
to the beam smoke detector, the model BMB kit can be or-
dered separately.
In those applications where the model BMB kit is not used,
the two connectors with attached cable (6 conductor for
the transmitter and 16 conductor for the receiver) can be
wired before the detector is mounted.
For wiring, first remove the pre-cut insulation from the con-
ductor to be connected, then use a wire nut to connect the
detector wire to the field wire. If the insulation has been re-
moved from any unused conductors, make sure they are
terminated properly to avoid short circuits. The transmitter
can be wired in one of two ways. Figure 7 shows the trans-
mitter permanently connected to the receiver. In this case
the transmitter receives its power along with communica-
tion for the alignment aid through the connecting pair of
D400-18-00
4
I56-494-10R
