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ST-720 |
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Compound alarm (CO+GAS)
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Features：
1.
Gas
alarm
meets UL
1484
standard;
Carbon
monoxide
alarm
meets
the most
recent
UL 2034
standard.
2.
Built-in
the high
tech
carbon
monoxide
sensor
and the
gas
sensor,
has the
high
sensitivity,
the high
stability,
and the
high gas
selectivity’s
characteristic,
may
precise
detect
the
carbon
monoxide
and the
gas
concentration.
3.
With the
advanced
high
tech
microprocessor
and the
wisdom
control,
processing
the
precise
computation
of the
carbon
monoxide's
concentration
and
through
time,
and have
much
intelligent
control.
4.
Provide
the test
/
silence
button,
besides
internal
self-
diagnosis,
under
the
stand-by
status,
may
lightly
press
the test
/
silence
button
to test
the
alarm.
This
button
also
provides
the
specialist
to test
the
system
link
when
continuously
presses
the
button
for 8
seconds.
5.
Provide
the
power
switch
button,
it
automatically
turn on
when
inserts
the
power
source,
when
continuously
press
the
button
for 1
second,
it will
turn
off, and
has the
key
tone.
This
button
provides
the
specialist
to use;
usually
this
product
should
setting
for the
turn on
condition.
6.
Built-in
the high
efficiency
wide-range
Switching
Power
Supply,
suitable
to the
universal
voltage.
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Selection guide： |
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Specifications： |
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Model
no. |
ST-720 |
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Model
name |
Compound alarm |
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Target gas |
CO +
GAS (LNG & LPG) |
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Detect mode |
Semiconductor type
or hot-wire |
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Threshold |
Meets
the most recent UL
2034 standard and
the UL 1484 standard |
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Power
LED |
Blue |
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Alarm
LED |
CO/Yellow; GAS/Red.
Blinking per
half-sec |
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Fault
LED |
CO/Yellow; GAS/Red.
Blinking per 8 sec |
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Warning sounds |
CO：4
quick beeps, 5
seconds off, repeat,
85dB/1M (as UL 2034)；
GAS：High/low
tone, repeat,
85dB/1M (Gas first
if synchronize) |
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Trouble sound |
Beep
per 24 seconds |
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External warning |
Sounds & Power LED:
Twice every
half-second, stops
half-second, repeat
continuous. |
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Working temperature |
0℃~
50℃ |
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Working humidity |
95%RH
max. |
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Power
supply |
AC100~240V, 50~60Hz;
or DC12V, 500mA
external (Refer to
the
Selection guide) |
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Power
consumption |
Stand-by: around 2W；
Warning: 2~7W
(According to the
link) |
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Dimensions |
H120mm×W70mm×D35mm
(with base)
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Weight |
135g
(AC, without plug) ;
115g (DC) |
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Signal link, Valve
control & other
optional functions:
Refer to the
Selection guide |
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Remark: LNG
(Liquefied Natural Gas),
LPG(Liquefied Petroleum Gas) |
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Concerning
the gas
alarm’s
threshold,
UL 1484
(Residential
Gas
Detectors)
standard:
The gas
concentration
has not
reached
the
1/100
LEL must
not
warning;
the gas
concentration
between
1/100~1/4
LEL must
warning.
The unit
setting
at 1/10
LEL,
meets UL
1484
standard. |
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CO alarm
is the
last
defense
line of
prevents
the
carbon
monoxide
poisoning.
UL 2034
(Single
and
Multiple
Station
Carbon
Monoxide
Alarms)
has the
most
detailed
standard.
The unit
conforms
to the
most
recent
UL 2034
standard. |
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The matches
valves：
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Solenoid valve
(Model: V15 or V20)
During normal status,
the valve is no power
consumption, energy
saving and high safety.
The pipeline bursts,
boils the overflow,
blows out ... and so on
cause which the gas
leaks, gas alarm output
the 12V pulse signal to
the valve to interrupt
gas.
The pull rod has the
dustproof and waterproof
cover. Meet IP-54.
Could use the manual
control to opens or
closes the valve.
Suits to the pipe size:
1/2" or 3/4" (V15 for
1/2”, V20 for 3/4”)
Working pressure:
500mBAR
Must conjunction the gas
alarm or related
equipment that provide
the signal.
Corresponding alarm
series: ST-700AE,
ST-710AE, and
ST-720AE…(Refer to the
Selection
guide)
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Mechanical valve
(Model: MV-20N)
During normal status,
the valve is no power
consumption. Suit for
any working pressure.
When the gas
concentration achieved
the threshold, the alarm
provides DC12V to the
mechanical valve,
automatically turns off
the gas, guarantees the
security.
With manual shut-off and
reset button.
Directly installs on the
ball valve. Unnecessary
to cut off the gas
pipeline, installs
conveniently.
The substitution product
of the solenoid valve,
must conjunction the gas
alarm or related
equipment that provide
the signal.
Corresponding alarm
series: ST-700AM,
ST-710AM, and ST-720AM…
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For
single station use：If
the supply cord is
damaged, it must be
replaced by the
manufacturer, its
service agent or
similarly qualified
persons in order to
avoid a hazard. |
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