System Sensor 2W-B Manual

System Sensor Røgdetektor 2W-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