System Sensor B401B - Manual (Page 3)

D450-01-01 3 I56-298-09R
Wiring Instructions
For system supervision — For terminals 2, 3, and 4 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 gauge molded into the base for
ease of wiring to terminals 1 through 4.
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
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 negative-in and negative-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.
CAUTION
Tamper-resistance Feature
Do not use the tamper-resistance feature if the XR2 removal
tool is to be used.
The tamper-resistant tab, in the detector mounting bracket,
can make the detector tamper-resistant by making it neces-
sary to use a small screwdriver or similar tool to detach the
detector from the bracket.
To make the detector tamper-resistant, use needle-nose pli-
ers to break the smaller tab at the scribed line on the tamp-
er-resistance tab. Figure 3A shows the location of this tab
on the detector mounting bracket. To remove a detector
from the bracket after it has been made tamper resistant,
use a small screwdriver or other similar tool, to depress the
tamper-resistance tab in the slot on the mounting bracket,
and rotate the detector counterclockwise (see Figure 3B).
NOTE: The decorative ring must be removed before the
smoke detector can be detached from the base
after the tamper-resistant capability is enabled.
The tamper-resistance feature can be defeated by breaking
and removing the plastic lever from the base. However, this
prevents ever using the feature again.
CAUTION
Figure 3A. Activating the tamper-resistance feature:
A78-1175-03
Figure 3B. Removing detector head from the base:
PLASTIC LEVER
BREAK TAB AT
DOTTED LINE BY
TWISTING TOWARD
CENTER OF BASE. USE SMALL-BLADED
SCREWDRIVER TO
PUSH PLASTIC LEVER
IN DIRECTION OF
ARROW.