System Sensor 4WT-B Manual

System Sensor Røgdetektor 4WT-B

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3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: 630-377-6495

www.systemsensor.com

INSTALLATION AND MAINTENANCE INSTRUCTIONS

Photoelectric Smoke Detector

Models: 2W-B, 2WT-B, 4W-B, 4WT-B

Series

BEFORE INSTALLING

Please read thoroughly System Sensor’s Applications Guide for System Smoke

Detectors (SPAG91), which provides detailed information on detector spacing,

placement, zoning, wiring, and special applications. This manual is available

online at www.systemsensor.com. s

NOTICE: This manual shall be left with the owner/user of this equipment.

IMPORTANT: This detector must be tested and maintained regularly following

NFPA 72 requirements. At a minimum, cleaning should be performed annually.

GENERAL DESCRIPTION

Models 2W-B and 2WT-B are 2-wire photoelectric smoke detectors; models

4W-B and 4WT-B are 4-wire photoelectric smoke detectors. All models in-

corporate a state-of-the-art optical sensing chamber and an advanced micro-

processor. The microprocessor allows the detector to automatically adjust its

sensitivity back to the factory setting when it becomes more sensitive due to

contaminants settling in its chamber. In order for this feature to work prop-

erly, the chamber must never be opened while power is applied to the smoke

detector. This includes cleaning, maintenance or screen replacement. Should

it become necessary, the screen/sensing chamber is field replaceable. Mod-

els 2WT-B and 4WT-B also feature a restorable, built-in, fixed temperature

(135°F) thermal detector and are also capable of sensing a freeze condition if

the temperature is below 41°F.

All i3 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 i3 Series compatible control panel or the i

3 Series 2W-

MOD2 module (refer to installation manual D500-46-00), the 2W-B and 2WT-B

are capable of generating a “maintenance needed” signal. The 2W-MOD2 can

indicate a need for cleaning, replacement, or a freeze condition (2WT-B only)

at the control panel or module.

Installation of the 2W-B, 2WT-B, 4W-B, and 4WT-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 removed. The mounting base installation is

further simplified by the incorporation 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

After 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).

I56-1800-014

ELECTRICAL SPECIFICATIONS 2-WIRE 4-WIRE

System Voltage –Nominal: 12/24 12/24 Volts Non-polarized

Min.: 8.5 8.5 Volts

Max.: 35 35 Volts

Max. Ripple Voltage: 30 30 % peak to peak of applied voltage

Max. Standby Current: 50 50 µA average

Peak Standby Current: 100 — µA

Max. Alarm Current: 130 20 mA 12 Volt Systems

(For 2W-B and 2WT-B, panel must limit current) 130 23 mA 24 Volt Systems

Alarm Contact Ratings: — 0.5 Amp @ 30 V AC/DC

Alarm Reset Time: 0.3 0.3 sec

Max. Start-up Capacitance: 0.1 — µF

Latching Alarm: Reset by momentary power interruption

Maximum Initial

Start-up Time: 45 15 sec

Alarm Verification*

Start-up Time: 15 15 sec

*Assumes the panel’s alarm verification reset time is 10 seconds or less. Should the alarm verification reset exceed 10 seconds, use the maximum initial start-up time.

PHYSICAL SPECIFICATIONS

Heat Sensor (Model 2WT-B and 4WT-B): 135°F (57.2°C)

Freeze Trouble (Model 2WT-B and 4WT-B): 41°F (5°C)

Operating Temperature Range:

2W-B and 4W-B: 32 to 120°F (0 to 49°C)

2WT-B and 4WT-B: 32 to 100°F (0 to 37.8°C)

Operating Humidity Range: 0 to 95% RH non-condensing

Storage Temperature Range: –4 to 158°F (–20 to 70°C)

Diameter (including base): 5.3 inches

Height (including base): 2.0 inches

Weight: 6.3 oz.

1 I56-1800-014

02-02

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. (See 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

RA100Z Remote Annunciator to be connected.

MOUNTING

Each i3 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. (See Figure 2.)

FIGURE 1: MOUNTING OF DETECTOR

S0121-00

The i3 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 i3 Series, ensure that the head is mounted to the correct base.

TAMPER-RESISTANT FEATURE

The i3

Series detectors include a tamper-resistant feature that prevents re-

moval from the mounting base without the use of a tool. To engage the tam-

per-resistant 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 BTA

FOR MPER LOCKTA

TAMPER

RELEASE BTA

DIRECT MOUNT

HOLES

S0226-00

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) RA –

(4) RA +

(3) – IN/OUT

(2) + OUT

(1) + IN

(5) RA –

(4) RA +

(3) – IN/OUT

(2) + OUT

(1) + IN

RA100Z

2W-B or

2WT-B

RA100Z

EOL

RESIST

S0133-01

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) NO

(3) – IN/OUT

(2) + OUT

(1) + IN

EOL

RELAY

(EOLR-1

)

EOL

RESISTOR

4W-B or

4WT-B

(5) COM

(4) NO

(3) – IN/OUT

(2) + OUT

(1) + IN

S0134-01

2 I56-1800-014

02-02

Produkt Specifikationer

Mærke:	System Sensor
Kategori:	Røgdetektor
Model:	4WT-B

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