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WS4916 Series Wireless Smoke Detector

Installation and Operating Instructions

Read this instruction sheet thoroughly before installation and use of the WS4916 Wireless Smoke Detector

Introduction

The WS4916 is a wireless photoelectric smoke detector with a fixed

temperature and rate of rise heat detector, and an internal piezo-

electric alarm. Four versions are available: US version (UL), Canadian

version (ULC), International version (EU), and Australian version

(AUS).

NOTE: Heat detection based on rate of rise has not been investi-

gated by UL/ULC.

NOTE: Australian version does not include the heat detector.

Piezo Siren

Operation

Approximately every 7 to 8 seconds the unit tests for a smoke or

heat alarm condition. During this sequence the unit also performs

self diagnostics, and checks for tampers and faults. During normal

operation the LED will flash every 50 seconds and the sounder will

not sound.

Smoke Alarm

The smoke detector will go into alarm when the signal level exceeds

the "alarm" threshold and automatically restore when the signal

level falls below the alarm "restore" threshold. During an alarm the

LED will flash 1/second and the sounder will sound the evacuation

temporal pattern (UL, EU) or continuous beeps (ULC).

The smoke detector has a preset warning threshold at 75% of the

alarm threshold. If the signal level stays above this threshold, but

below the alarm threshold, for more than 120 seconds, the detec-

tor will go into the "warning" state. If the signal level falls below

the early warning "restore" threshold, the detector will restore to its

normal state automatically. If the signal level rises above the alarm

threshold, the detector will go into alarm. The LED will flash and the

sounder will chirp every 50 seconds when in the warning state.

NOTE: This feature is intended to provide a warning if the envi-

ronment is persistently close to the alarm threshold and provide

more time to investigate and either escape or correct the situa-

tion.

Smoke - Drift Compensation

The detector automatically compensates for long-term environmen-

tally induced changes to maintain a constant smoke sensitivity.

When the drift compensation has reached its high or low limit of

adjustment, the detector will go into the trouble state.

Heat Alarm

The heat detector will go into alarm when the heat signal level

exceeds the heat alarm threshold (135ºF/57ºC); and will automati-

cally restore when the heat signal level falls below the heat alarm

threshold (restore). The detector will also go into heat alarm if there

is a rapid increase in the temperature over a short period of time.

During an alarm the LED will flash 1/second and the sounder will

sound the evacuation temporal pattern (UL, EU) or continuous

beeps (ULC).

Tamper

The removal of the detector from the mounting plate initiates a

"tamper" transmission. The tamper condition is restored after the

detector is mounted on the plate.

LED/Test Button

Alignment Marks

Wireless Transmissions

A supervisory message is transmitted at 64 minute intervals (12

minutes in EU model) to the control panel. If the signal is not

received the control panel determines that the detector is missing.

The detector transmits the following:

• Alarm / Alarm Restore - (heat or smoke alarm). Transmitted at

time of occurrence.

• Tamper / Tamper Restore - (tamper switch activated) 10 second

maximum delay on restore before transmission.

• Low Battery - (battery voltage falls below threshold). The bat-

teries are tested & transmitted at the time of a supervisory or

other transmissions.

• Trouble - (detector fault or sensor compensation limit reached).

Troubles are transmitted at the time of occurrence (one trouble

per supervisory interval).

Batteries

The WS4916 is powered by two, 3V

Do NOT use batteries other than those listed.

The low battery threshold is set so the batteries will provide not less

than 14 days of operation and at that point the detector will send a

"low battery" signal. If the battery is still low 7 days after falling

through the low battery threshold, the horn will "chirp" once every

48 seconds until battery failure. During the first 7 days after low

battery detection, (non-chirp period), if the detector is tested or

goes into alarm, the horn will "chirp" once the test or alarm is

restored and remain "chirping" until battery failure.

Replacement batteries can be purchased from the distributor, the

installation company, hardware stores or supermarkets etc.

Installation Instructions

Installation

The WS4916 Series wireless smoke detector shall be installed and

used within an environment that provides the pollution degree max

2 and overvoltages category II in NON HAZARDOUS LOCATIONS,

indoor only. The equipment is designed to be installed by SERVICE

PERSONS only; (SERVICE PERSON is defined as a person having the

appropriate technical training and experience necessary to be aware

of hazards to which that person may be exposed in performing a

task and of measures to minimize the risks to that person or other

persons.)

1. Smoke Detector Placement

On smooth ceilings, detectors may be spaced 9.1m (30 feet) apart

as a guide. Other spacing may be required depending on ceiling

height, air movement, the presence of joists, uninsulated ceilings,

etc. Consult National Fire Alarm Code NFPA 72 Chapter 11, CAN/

ULC-S553-02 or other appropriate national standards for installa-

tion recommendations.

• Do NOT locate smoke detectors at the top of peaked or gabled

ceilings; the dead air space in these locations may prevent the unit

from detecting smoke. Avoid areas with turbulent air flow, such

as near doors, fans or windows. Rapid air movement around the

detector may prevent smoke from entering the unit.

• Do NOT locate detectors in areas of high humidity.

• Do NOT locate detectors in areas where the temperature rises

above 38ºC (100ºF) or falls below 5ºC (41ºF).

Install Smoke detectors in accordance with NFPA 72, Chapter 11.

"Smoke detectors shall be installed outside of each sleeping area in

the immediate vicinity of the bedrooms and on each additional

story of the family living unit, including basements and excluding

crawl spaces and unfinished attics. In new construction, a smoke

detector also shall be installed in each sleeping room."

lithium batteries.