Fire Alarm Systems | D382 Combustible Gas Detector (Macurco GD-2A)

D382 Combustible Gas Detector

(Macurco GD-2A)

www.boschsecurity.com

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12 VDC/VAC or 24 VDC/VAC operation

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Self-purging semiconductor sensor requires no

maintenance or recalibration

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SPDT (Form C) alarm Relay and SPST (Form A)

trouble relay designed for seamless connection to

control panels or other devices

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Installer selectable self-restoring or latching

functionality

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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.