System Sensor B406B - Manual (Page 2)

D450-05-00 2 I56-376-08R
Mounting
This detector base mounts directly to 3
1 ⁄
2
-inch and 4-inch
octagon boxes, and 4-inch square boxes (with or without
plaster rings). To mount, remove decorative ring by turning
it in either direction to unhook the snaps, then separate the
ring from the base. Install the base to the box using the
screws supplied with the junction box and the appropriate
mounting slots in the base. Place decorative ring onto base,
then turn in either direction until the ring snaps in place
(see Figure 1).
Installation Guidelines
All wiring must be installed in compliance with the
National Electrical Code and the local codes having juris-
diction. Proper wire gauges should be used. The conduc-
tors used to connect smoke detectors to control panels and
accessory devices should be color-coded to prevent wiring
mistakes. Improper connections can prevent a system from
responding properly in the event of a fire.
For signal wiring (the wiring between interconnected
detectors), it is recommended that the wire be no smaller
than 18 gauge. Wire sizes up to 12 gauge may be used with
the base. For best system performance, the power (+) and
(–) loop wires should be twisted pair and installed in sep-
arate grounded conduit to protect the loop from extraneous
electrical interference.
Smoke detectors and alarm system control panels have
specifications for allowable loop resistance. Consult the
control panel manufacturer’s specifications for the total
loop resistance of the particular model control panel being
used before wiring the detector loops.
Wiring Instructions
For system supervision — For terminals 2, 3, and 5 do not
use looped wire under terminals. Break wire run to provide
system supervision of connections.
Wire connections are made by simply stripping insulation
from the end of the wire, sliding the bare end of the wire
under the clamping plate, and tightening the clamping
plate screw. Use the strip gauges molded into the inside
and underside of the base for ease of wiring to terminals 1
through 5, and to terminals 12 through 14, respectively.
System Sensor smoke detectors and mounting bases are
marked with a compatibility identifier located as the last
digit of a five digit code stamped on the back of the prod-
uct. Connect detectors/mounting bases only to compatible
control units as indicated in System Sensor’s compatibility
chart which contains a current list of UL listed control units
CAUTION
Figure 1. Mounting base to box:
SNAP ON
DECORATIVE
RING
SCREWS (NOT
SUPPLIED)
DETECTOR
BASE
BOX (NOT
SUPPLIED)
SHORTING
SPRING
and detector head/base combinations. A copy of this list is
available from System Sensor upon request.
The zone wiring of the detector base should be checked
before the detector heads are installed in them. To make
this possible, this base contains a special spring-type short-
ing jumper. After a detector base is properly wired and
mounted on an electrical box, make sure that the jumper
spring is in contact with the base of Terminal 3. This tem-
porary connection shorts the positive-in and positive-out
leads and permits the wiring of the loop to be checked for
continuity.
Once all the detector bases have been wired and mounted,
and the loop wiring has been checked, the detector heads
may be installed in the bases. The shorting spring in the
base will disengage automatically when the detector head
is removed from the base. DO NOT remove the shorting
spring since it reengages as the detector head is turned into
the base, completing the circuit.
A78-1175-01