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

D100-99-00 2 I56-2170-008R
the i3 Series sounder smoke detectors on the loop. Some panels may require
the use of programmable outputs. Refer to System Sensor literature for further
information on the RRS-MOD.
All i
3 Series detectors are designed to provide open area protection. Two-wire models
must be used with compatible UL Listed panels only.
When used with an “i 3 Ready” control panel or the i 3 Series 2W-MOD2 mod-
ule (refer to installation manual), the 2WTR-B and 2WTA-B are capable of
generating a “maintenance needed” signal. The 2W-MOD2 can indicate a need
for cleaning, replacement, or a freeze trouble at the control panel or module.
WARNING
The 2W-MOD2 has replaced the previous model number 2W-MOD. To ensure
proper remote maintenance signaling capabilities, do not use the 2W-MOD
with i
3 model numbers 2WTR-B and 2WTA-B.
Installation of the 2WTR-B, 2WTA-B, 4WTR-B, 4WTA-B, 4WTAR-B, and
4WITAR-B detectors is simplified by the use of a mounting base that may
be pre-wired to the system, allowing the detector to be easily installed or re-
moved. The mounting base installation is further simplified by the incorpora-
tion of features compatible with drywall fasteners.
Two LEDs on the detector provide a local visual indication of the detector’s status:
TaBLe 1: deTeCTor Led modeS
Green LED Red LED
Power-up Blink 10 sec Blink 10 sec
Normal (standby) Blink 5 sec —
Out of sensitivity — Blink 5 sec
Freeze Trouble — Blink 10 sec
Alarm — Solid
During an initial power-up delay, the red and green LEDs will blink synchro-
nously once every ten seconds. It will take approximately 80 seconds for the
detector to finish the power-up cycle (see Table 2).
TaBLe 2: poWer-Up SeqUenCe For Led STaTUS indiCaTion*
Condition Duration
Initial LED Status Indication 80 seconds
Initial LED Status Indication
(if excessive electrical noise is present)
4 minutes
* Refer to Electrical Specifications for start-up time in conjunction with panel
alarm verification.
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 i3 Series Model SENS-RDR Infrared
Sensitivity Reader tool (see Figure 4) should be used. Refer to instructions
manual D100-98-00 for the proper use of the SENS-RDR.
Models 2WTR-B and 2WTA-B also include an output that allows an optional
Model RA400Z/RA100Z Remote Annunciator to be connected.
moUnTing
General spacing guidelines are 30˝×30˝, with each detector covering 900 ft
2
under maximum conditions.
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.
Each i 3 Series detector is supplied with a mounting base that can be ceiling- or
wall-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 1: moUnTing oF deTeCTor
S0121-00
The i 3 Series heads and bases are keyed so that all heads will only fit into
their respective bases. One model 4-wire relay base will accept the 4WTR-B,
4WTAR-B and 4WITAR-B detector heads and no others. The 2WTR-B, 2WTA-B
and 4WTA-B will only fit into their respective mounting bases and no others.
The heads and bases are clearly identified as either 2-wire or 4-wire. When
mounting the i
3 Series, ensure that the head is mounted to the correct base,
and the test switch is aligned with the tamper release tab.
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.
inSTaLLaTion gUideLineS
The i
3 Series detectors represent an advancement over the previous sounder
and Form C relay models and are designed to be used with the 2W-MOD2 and
RRS-MOD only. Do not mix detector models on a zone.
FigUre 2: Tamper-reSiSTanT FeaTUre
SNAP OFF TAB FOR
TAMPER LOCK
TAMPER RELEASE TAB DIRECT MOUNT HOLES
S0109-00
Wiring inSTaLLaTion gUideLineS
All wiring must be installed in compliance with the NFPA 70, National Electri-
cal 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. Do not put wires more than 2
gauge apart under the same clamping plate.
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 mod-
els 2WTR-B and 2WTA-B, connect detectors only to compatible alarm control
panels as identified by System Sensor’s two-wire compatibility chart, available
at www.systemsensor.com.