D400-07-00 REV#-002
2
I56-006-002
. Directly to a 3-/2 inch or 4 inch octagonal, -/2 inch
deep electrical box, or
2. To a 4 inch square electrical box by using a plaster ring
with the supplied mounting bracket kit.
Installation Wiring Guidelines
All wiring must be installed in compliance with the National
Electrical Code and all applicable local codes and any spe-
cial requirements of the authority having jurisdiction, us
-
ing the proper wire size. The conductors used to connect
smoke detectors to control panels and accessory devices
should be color-coded to reduce the likelihood of wiring
errors. Improper connections can prevent a system from
responding properly in the event of a fire.
For signal wiring (the wiring between interconnected de-
tectors), it is recommended that the wire be no smaller
than AWG 8. However, the screws and clamping plate
can accommodate wire sizes up to AWG 2. The use of
twisted pair wiring for the power (+ and -) loop is recom-
mended to minimize the effects of electrical interference.
Smoke detectors and alarm system control panels have
specifications for allowable loop resistance. Consult the
A78-534-00
control panel manufacturer’s specifications for the total
loop resistance allowed for the control panel being used
before wiring the detector loops.
Begin electrical connections by stripping about 3/8" insu-
lation from the end of the wire. Then, slide the bare end of
the wire under the clamping plate and tighten the clamping
plate screw. A wiring diagram for a typical 2-wire detector
system is shown in
Figure 3.
NOTE:
Break the wire at each terminal to ensure that the
connections are supervised. Do NOT loop the wire
under the terminals.
Tamper-resistant Feature
This detector includes a tamper-resistant feature that ef-
fectively prevents removal of the detector without the use
of a tool. To make the detector tamper-resistant, break off
the smaller tab at the scribed line on the tamper resistant
tab, on the detector mounting bracket (see Figure 2), then
install the detector. To remove the detector from the brack-
et once it has been made tamper resistant, use a small
screwdriver to depress the tamper-resistant tab located
in the slot on the mounting bracket and turn the detector
counterclockwise for removal.
Installation
WARNING
Disconnect the power to the alarm system control unit be-
fore installing detectors.
. Wire the detector following the installation guidelines.
2. Line up arrows on the detector with the arrows on the
mounting bracket.
3. Rotate the detector clockwise until it clicks into place.
4. After all detectors have been installed, apply power to
the control unit.
5. Test the detector as described under TESTING.
6. Reset the detector at the system control panel.
7. Notify the proper authorities that the system is in op-
eration.
CAUTION
Dust covers can be used to help limit dust entry to the
detector, but they are not a substitute for removing the
detector during building construction. Remove any dust
covers before placing system in service.
Testing
Before testing the detector, look for the presence of the
flashing LED. If it does not flash, power has been lost to
TAMPER
RESISTANT
TAB
TO MAKE DETECTOR TAMPER RESISTANT,
BREAK OFF TAB EXTENSION
AT SCRIBED LINE
Figure 2. Model 1400A detector mounting bracket:
Figure 1. Surface mounting of Model 1400A de-
tector on 3-1/2 and 4 inch octagonal box:
A78-554-02
