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 heat detector and an internal piezoelectric
alarm. Three version are available: US version (UL), Canadian ver-
sion (ULC) and an International version (EU).
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 environ-
mentally induced changes to maintain a constant smoke sensitiv-
ity. 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 automat-
ically restore when the heat signal level falls below the heat alarm
threshold (restore). 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.
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 batteries
are tested & transmitted at the time of a supervisory or other trans-
missions.
•
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
DC
lithium batteries.
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.
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 LOCA-
TIONS, 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 neces-
sary 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, includ-
ing basements and
excluding crawl spaces
and unfinished attics. In
new construction, a
smoke detector also shall
be installed in each sleep-
ing room.”
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