WS8916 Series Wireless Smoke Detector
Installation and Operating Instructions
Read this instruction sheet thoroughly before installation and use of the WS8916 Wireless Smoke Detector.
Introduction
NOTE:
The WS8916 is a wireless photoelectric smoke detector with a fixed
temperature and rate of rise heat detector, and an internal piezoelectric
alarm.
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 siren 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 siren will sound the evacuation temporal
pattern.
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 detector 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 siren will chirp
every 50 seconds when in the warning state.
NOTE:
This feature is intended to provide a warning if the environ-
ment is persistently close to the alarm threshold and provide more
time to investigate and either escape or correct the situation.
Smoke - Drift Compensation
The detector automatically compensates for long-term environmentally
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 (57ºC/135ºF); and will automatically 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 siren will sound the evacuation temporal pattern.
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 12 minute intervals 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 transmis-
sions.
•
Trouble
- (detector fault or sensor compensation limit reached). Trou-
bles are transmitted at the time of occurrence (one trouble per super-
visory interval).
Batteries
The WS8916 is powered by two, 3V
DC
lithium batteries (see Specifica-
tion section).
Do NOT use any other batteries 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
The WS8916 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
appropriate national standards for installation recommendations.
• Do
NOT
locate smoke detectors at the top of peaked or gabled ceil-
ings; 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).
LED/Test Button
Piezo Siren
Alignment Marks
'*
29007452R002
