Data Sheet

Fire Alarm Systems | D382 Combustible Gas Detector (Macurco GD-2A)
D382 Combustible Gas Detector
(Macurco GD-2A)
www.boschsecurity.com
u 12 VDC/VAC or 24 VDC/VAC operation
u Self-purging semiconductor sensor requires no
maintenance or recalibration
u SPDT (Form C) alarm Relay and SPST (Form A)
trouble relay designed for seamless connection to
control panels or other devices
u Installer selectable self-restoring or latching
functionality
u Red and Green LED status indicators
The D382 Combustible Gas Detector (Macurco GD‑2A)
detects the presence of combustible gases such as
propane and natural gas (methane). It is rated by
Underwriters Laboratories (UL) to alarm below 25% of
the lower explosion level (LEL) of propane or
methane.
Use in non-hazardous locations such as residences,
retail stores, office buildings, and institutional
buildings. It is usually installed in rooms where gas
appliances are located or in rooms that are
susceptible to gas seepage.
Notice
Do not use in industrial locations such as
factories, refineries and chemical plants.
Notice
The D382 does not detect carbon monoxide.
Functions
Input Power
The detector uses a full-wave bridge rectifier so it is
independent of input power polarity. It operates on AC
or DC voltages from 12 V to 24V. A switching regulator
is used to efficiently match the wide input voltage
range to the fixed internal power system.
Status LEDs
The detector has one green and one red status LED on
the front of the detector.
The detector has an internal two-minute time delay
that prevents alarms during the warm-up of the gas
sensor. During the warm-up period, the green LED
light flashes. Once the delay is over, the continuous
green light indicates normal operation.
The detector has a supervisory circuit of critical
functions. A trouble condition, due to a failure of a
non-reliable component, results in both lights flashing
and the trouble relay activating. A power failure also
causes the trouble relay to activate.
The red LED turns on at the same time the alarm relay
activates to indicate the alarm condition.