Bosch D382 Specsheet

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

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.

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

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.

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

Certifications and approvals

3M (Macurco) holds the following Listings and
Approvals:

Region Certification

USA UL FTAM: Gas and Vapor Detectors and

CSFM see our website

Sensors (UL2075)

Installation/configuration notes

Compatibility Information

The combustible gas detector is compatible with all UL
Listed control panels that have four-wire power and
alarm initiating circuits.

Mounting Considerations

The detector is capable of supervising an area of up to
900 ft2 (83.6 m2). In larger areas, space the detectors
on 30 ft (10 m) centers.
Natural gas (methane) is lighter than air and collects
at the ceiling. Bottle gas (propane) is heavier than air
and collects on the floor. Mount the detector 1 ft.
(0.3 m) from the floor, or 1 ft. (0.3 m) from the ceiling,
depending on the targeted gas. Mount the detector at
least 6 in. (15.2 cm) from corners to avoid dead air
space.
The detector mounts on a standard four-inch square
back box or a double-gang box.

Wiring Considerations

The combustible gas detector must be installed on a
separate circuit or zone reserved for combustible gas
detectors and cannot be combined with smoke, heat,
or intrusion detectors. Alarms for this circuit or zone
must activate audible notification appliances of at
least 85 dB with a distinctive sound for gas detection.
Use the indicated wire size for the detector loop:

Length of Wire Run Recommended Wire Size

200 ft (61 m) or less 22 AWG (0.8 mm)

Up to 575 ft (175 m) 20 AWG (1.0 mm)

Up to 686 ft (209 m) 18 AWG (1.2 mm)

Up to 1300 ft (396 m) 16 AWG (1.5 mm)

Up to 2100 ft (640 m) 14 AWG (1.8 mm)

Up to 3200 ft (975 m) 12 AWG (2.3 mm)

Parts included

Quant. Component

1 Combustible gas detector

1 Hardware pack

1 Literature pack

Technical specifications

Electrical

Current

Alarm: At 12 VDC: 70 mA; at 24 VDC: 35 mA

Standby: At 12 VDC: 45 mA; at 24 VDC: 22 mA

Voltage

VDC input: 12 VDC to 24 VDC

VAC input: 12 VAC to 24 VAC, 50 Hz or 60 Hz

At 12 VAC: 100 mA; at 24 VAC: 65 mA

At 12 VAC: 65 mA; at 24 VAC: 45 mA

Environmental

Temperature
(operating):

+32°F to +120°F (0°C to +49°C);

For UL installations, +40°F to +120°F (+4.4°C
to +49°C)

Mechanical

Color: White

Dimensions
(H x W x D):

Weight (shipping): 0.54 lb (0.25 kg)

4.5 in. x 5.0 in. x 1. 625 in.
(11.4 cm x 12.7 cm x 4.1 cm)

Outputs

Alarm

Relay Configuration: one SPDT (Form C)

Relay Rating: 0.125 A, 40 V, 3 VA

Set Point: 25% below LEL for propane or methane

Trouble

Relay Configuration: one SPST (Form A)

Relay Rating: 0.25 A, 40 v, 10 VA

Trademarks

All hardware and software product names used in this
document are likely to be registered trademarks and
must be treated accordingly.

Ordering information

D382 Combustible Gas Detector (Macurco GD-2A)

The D382 is installed in rooms where gas appliances
are located or rooms susceptible to gas seepage
where it detects the presence of combustible gases
such as propane and methane. It is compatible with all
UL Listed control panels with four-wire power and
alarm initiating circuits.

Order number D382