System Sensor i3 Series Smoke Detectors - Manual (Page 2)

D100-96-00 2 I56-1800-011R
NOTE: If, during power-up, the detector determines there is excessive electri-
cal noise in the system such as those caused by improper grounding of the
system or the conduit, both LEDs will blink for up to 4 minutes before display-
ing detector status (see Table 2).
After power-up has completed and the detector is functioning normally within
its listed sensitivity range, the green LED blinks once every five seconds. If the
detector is in need of maintenance because its sensitivity has shifted outside
the listed limits, the red LED blinks once every five seconds. When the detec-
tor is in the alarm mode, the red LED latches on. The LED indication must not
be used in lieu of the tests specified under Testing. In a freeze trouble condi-
tion, the red LED will blink once every 10 seconds (refer to Table 1).
To measure the detector’s sensitivity, the i 3 Series Model SENS-RDR Infrared
Sensitivity Reader tool should be used. (See Figure 4.)
Models 2W-B and 2WT-B also include an output that allows an optional Model
RA400Z Remote Annunciator to be connected.
mounTing
Each i
3 Series detector is supplied with a mounting base that can be
mounted:
1. To a single gang box, or
2. To a 31⁄2-inch or 4-inch octagonal box, or
3. To a 4-inch square box with a plaster ring, or
4. Direct mount or to ceiling using drywall fasteners (Figure 2).
Figure 1: mounTing oF deTeCTor
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The i 3 Series heads and bases are keyed so that a 2-wire head will only mount
to a 2-wire base, and a 4-wire head will only mount to a 4-wire base. The
heads and bases are clearly identified as either 2-wire or 4-wire. When mount-
ing the i
3 Series, ensure that the head is mounted to the correct base.
Tamper-reSiSTanT FeaTure
The i
3 Series detectors include a tamper-resistant feature that prevents removal
from the mounting base without the use of a tool. To engage the tamper-re-
sistant feature, cut the small plastic tab located on the mounting base (Figure
2), and then install the detector. To remove the detector from the base once it
has been made tamper resistant, use a small screwdriver to depress the square
tamper release tab, located on the skirt of the mounting base, and turn the
detector counterclockwise.
Figure 2: Tamper-reSiSTanT FeaTure
SNAP OFF TAB
FOR TAMPER LOCK
TAMPER
RELEASE TAB
DIRECT MOUNT
HOLES
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do noT inSTaLL deTeCTorS in The FoLLoWing areaS:
• In or near areas where particles of combustion are normally present
such as kitchens; in garages (vehicle exhaust); near furnaces, hot water
heaters, or gas space heaters.
• In very cold or very hot areas.
• In wet or excessively humid areas, or next to bathrooms with showers.
• In dusty, dirty, or insect-infested areas.
• Near fresh air inlets or returns or excessively drafty areas. Air condition-
ers, heaters, fans, and fresh air intakes and returns can drive smoke
away from the detector.
Consult NFPA 72, the local Authority Having Jurisdiction (AHJ), and/or ap-
plicable codes for specific information regarding the spacing and placement
of smoke detectors.
CAUTION
Smoke detectors are not to be used with detector guards unless the combina-
tion has been evaluated and found suitable for that purpose.
Wiring inSTaLLaTion guideLineS
All wiring must be installed in compliance with the National Electrical Code,
applicable state and local codes, and any special requirements of the local
Authority Having Jurisdiction.
Proper wire gauges should be used. The conductors used to connect smoke
detectors to the alarm control panel 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.
The screw terminals in the mounting base will accept 14–22 gauge wire. For
best system performance, all wiring should be installed in separate grounded
conduit; do not mix fire alarm system wiring in the same conduit as any other
electrical wiring. Twisted pair may be used to provide additional protection
against extraneous electrical interference.
Wire connections are made by stripping approximately 1⁄4-inch of insulation
from the end of the feed wire, inserting it into the proper base terminal, and
tightening the screw to secure the wire in place.
TWo-Wire CompaTibiLiTY
System Sensor two-wire smoke detectors are marked with a compatibility
identifier located on the label on the back of the product. For two-wire models
2W-B and 2WT-B, connect detectors only to compatible alarm control panels
as identified by System Sensor’s compatibility chart. This chart contains the
current list of detectors and UL Listed compatible control units. A copy of this
list is available from System Sensor upon request.
Wiring diagramS
Figure 3a: Wiring diagram, 2W-b and 2WT-b
2-WIRE
ZONE
2-WIRE
CONTROL
PANEL
+
–
2W-B or
2WT-B
(5)
R
A
–
(4)
R
A
+
(3)
– IN/OUT
(2)
+ OUT
(1)
+ IN
(5)
R
A
–
(4)
R
A
+
(3)
– IN/OUT
(2)
+ OUT
(1)
+ IN
RA400Z
2W-B or
2WT-B
RA400Z
EOL
RESISTOR
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Figure 3b: Wiring diagram, 4W-b and 4WT-b
AUX OR
SMOKE
POWER
IDC
4-WIRE
CONTROL
PANEL
+
+
–
–
4W-B or
4WT-B
(5)
COM
(4)
N
O
(3)
– IN/OU
T
(2)
+ OU
T
(1)
+ IN
EOL
RELAY
(EOLR-1)
EOL
RESISTOR
4W-B or
4WT-B
(5)
COM
(4)
N
O
(3)
– IN/OU
T
(2)
+ OU
T
(1)
+ IN
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