System-sensor i3 Series Thermal Detectors Manuel d'utilisateur télécharger pdf (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

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

Ready” control panel or the i

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

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

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

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

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

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

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

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.

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System-sensor i3 Series Thermal Detectors Manuel d'utilisateur Page 2

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