WIZMART GAS DETECTOR
NB-983 SERIES USER’S MANUAL
INTRODUCTION
Wizmart's NB-983-NG and NB-983-LG Series Gas Detector
is effective for detecting any buildup of natural gas and
liquefied gas in your residence. The NB-983 gas detectors
are engineered to perform the following features:
(1) Easy to install. It allows connecting to fire control panel
or security monitoring system.
(2) Monitoring any accidental leaks of natural gas or
liquefied gas in a continuous manner.
(3) Giving a loud alarm (
≥
70 dB) when it detects a buildup
of natural gas.
(4) Self-testing its operative functions continuously.
(5) Offering a 5-year warranty for the natural gas sensing unit.
GASEOUS FUEL IN OUR DAILY LIFE
Either natural gas or liquefied gas has become one of the major
energy sources for our modern life, which has been found its
numerous applications in many sectors such as household,
business, industrial uses and heating systems in the buildings.
At home, we use gas for cooking, drying, heating, and other
purposes. However, any accidental gas leaks into the air may
lead to possible hazards such as fire and explosion, which is
definitely a potential threat to the lose of our lives and household
properties. Most likely sources of leaks come from natural gas
appliances such as heaters, stoves, refrigerators, and furnaces.
Gas leaks from outside or below ground level can also seep into
your home. However, as natural gas builds up, it mixes with
oxygen to produce a mixture that can be combustible and
explosive if it is ignited by a spark or flame. That’s why we
should be more cautious to any accidental leaks of natural gas
or liquefied gas in a continuous manner. The sensor vent port of
the gas detector would allow natural gas to enter the sensor
chamber to be monitored by the sensing circuit built inside.
LOCATIONS WHERE WE NEED TO INSTALL GAS
DETECTORS
Liquefied gas is heavier than air, the leak of such gas collects
near to the floor or in the lowest levels of rooms. To detect a
dangerous concentration of liquefied gas, you should install
your detector under 30 cm above the floor and less than 4 m
of horizontal distance to the gas appliance in the same room.
Natural gas is lighter than air, therefore, it collects in the
ceiling of rooms. In order to reach effective sensibility of
natural gas leaks, you should install your gas detector as
close to the ceiling as possible, i.e. under 30 cm from the
ceiling and less than 8 m of horizontal distance away from
gas burner or a kitchen stove in the same room, as shown in
Figure 1.
Gas detector can only perform sensitively to the same
location where the gas appliances exist. Since the unusual
gas leaks may occur in other locations in your home, it is
strongly recommended that gas detectors are installed in the
areas where a gas burner or a kitchen stove is used such as
kitchen, living rooms, bed rooms, garage, and basement.
(see Figure 2).
Figure 1. Suggested installation positions for NB-983 series gas
detectors
Figure 2. Locations for installing gas detectors in your home
WIRING DIAGRAM FOR NB-983 SERIES GAS
DETECTORS
Figure 3 shows the wiring diagram for NB-983 series gas
detectors.
L
C
FIRE
CONTROL
PANEL
POWER
P
P
2 3
5
6
2 3
5 6
E
ND OF DE
V
ICE
FIRST DETECTOR BASE
LAST DETECTOR
BASE
https://www.e-camere.ro/alarma-antiefractie/detectori/Wizmart/NB-983/
