MACURCO GD-2B Combustible Gas Detector Instruction Manual

: June 15, 2024
: MaCURCO

Table of Contents

MACURCO GD-2B Combustible Gas Detector
General Safety Information
General Description
Features
Specifications
Installation & Operation Instructions
Mounting Location
Installation
Power Up
Reset / Silence Switch
Maintenance
warranty
CONTACT
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

MACURCO GD-2B Combustible Gas Detector

IMPORTANT: These User Instructions are to be provided to the homeowner /end-user upon product installation. Each person installing or using this equipment must read and understand the information in these User Instructions before use. Installation of this equipment by untrained or unqualified persons, or use that is not under these User Instructions may adversely affect product performance and result in sickness or death. For proper use see User Instructions or call Macurco Technical Service.

General Safety Information

Read before operating
The GD-2B is a low voltage (9-32VDC, 12-24VAC) electronic detector of combustible, heating-type gases. The GD-2B is designed for connection to Fire Alarm/Burglary Control Panels. Alarm control panels that work on 12 or 24 VDC can provide battery backup to the GD-2B detectors. This combustible gas detector has been designed for methane (natural gas) and propane (LP) gas. It is NOT designed to detect smoke, fire or carbon monoxide.
List of warnings

WARNING

Each person using this equipment must read and understand the information in this user manual before use. Use of this equipment by untrained or unqualified persons or use that is not by this user manual may adversely affect the product performance.
Use only for monitoring the gas which the sensor and detector are designed to monitor. Failure to do so may result in exposure to gases not detectable and cause sickness or death. For proper use, see the user manual, or contact Macurco Technical Support at 1-844- 325-3050.
GD-2B may not function effectively below 32 °F or above 120°F. Using the detector outside of this temperature range may adversely affect product performance.
This detector helps monitor for the presence and concentration level of certain specified airborne gases. Misuse may produce an inaccurate reading, which means that higher levels of the gas being monitored may be present and could result in overexposure and cause sickness or death. For proper use, see the user manual, or contact Macurco Technical Support at 1-844-325-3050.
This product is intended for use in ordinary indoor locations of family living units and office workspaces. The GD-2B is not designed to measure compliance with Occupational Safety and Health Administration (OSHA) commercial or industrial standards.
When the unit is turned on it performs a self-test, which activates the audible and/or visual alarms. If the self-test fails, or all the alarms do not activate, do not use it and contact Technical Support at 1-844-325-3050.
Immediately exit the environment if there is an alarm condition on the detector.
This detector will only indicate the presence of combustible gas at the sensor. Combustible gas may be present in other areas. Accommodation spaces should be well-ventilated when household cleaning supplies or similar contaminants are used.
Do not cover or obstruct the visual alarm LED. Doing so may adversely affect the product

performance.

Do not disassemble the unit or attempt to repair or modify any component of this detector.

This detector contains no user-serviceable parts, and substitution of components may adversely affect product performance and void the product warranty.

CAUTION

Avoid the use of harsh cleaning materials, abrasives and other organic solvents. Such materials may permanently scratch the surfaces, and damage the sensor, labels or instrument housing.

UL 2034
Use Instructions and Limitations

WARNING
Each person using this equipment must read and understand the information in this user manual before use. Use of this equipment by untrained or unqualified persons or use that is not under this user manual may adversely affect product performance.

Use for
The GD-2B is an electronic detector of combustible, heating-type gases (natural gas and propane), designed for connection to alarm control panels. It can operate on 12 to 24 VDC power from standby or interruptible panel power or be powered separately. The GD-2B is intended for installation in buildings in non-hazardous locations such as residences, retail stores, office buildings, and institutional buildings.
WARNING
Use only for monitoring the gas which the sensor and detector are designed to monitor. Failure to do so may result in exposure to gases not detectable and cause sickness or death. For proper use, see the user manual, or contact Macurco Technical Support at 1-844-325-3050.
Do Not Use For
The GD-2B is NOT intended for use in industrial applications such as refineries, chemical plants, etc. The GD-2B does NOT detect carbon monoxide. Do NOT mount the GD-2B in a corner. The GD-2B is designed for connection to Fire Alarm/Burglary Control Panels. Do not connect the GD-2B to Fire Alarm Circuits, or Burglar Alarm or other signals. The Alarm Control Panel must be dedicated to gas detection or have alarm devices that provide a distinctive alarm for gas detection. Do NOT mount the GD-2B in kitchens or bathrooms – alcohol, ammonia, cleaning solvents, paint thinner, gasoline vapours, and aerosol propellants (aerosol cans such as hair spray usually contain a combustible gas) may cause nuisance alarms.
WARNING
GD-2B may not function effectively below 32 °F or above 120°F. Using the detector outside of this temperature range may adversely affect product performance.

General Description

The GD-2B is a low voltage (9-32VDC, 12-24VAC) electronic detector of combustible, heating-type gases, that has been calibrated for methane (natural gas) and propane (LP) gas.
The GD-2B is designed for connection to Fire Alarm/Burglary Control Panels.
The GD-2B has an SPST Alarm relay, for connection to control panels or other devices.
The GD-2B does NOT detect carbon monoxide.
The GD-2B has an optional internal audible sounder.

Features

Designed to meet UL Standard 2075 for the standard for safety of gas and vapour detectors and sensors
Sensitivity tested based on UL 1484 standard for residential gas detectors
Detects heating gases: propane (LP), natural gas (methane)
SPST alarm and trouble relays
Can be self-restoring or latching
10-year solid-state electronic sensor: no maintenance or recalibration
Temperature-compensated
Simple installation and operation
Supervised sensor

Specifications

Size: 3-1/8 x 5-1/8 x 1-3/4 inch (7.94 x 13.02 x 4.4 cm)
Shipping weight: 0.54 pounds
Voltage: 9-32VDC, 12-24VAC
Current (non-alarm): 40 ma @ 12 VDC, 20 ma @ 24 VDC, 34 ma @ 12 VAC, 17 ma @ 24 VAC
Current (in alarm): 56 ma @ 12 VDC, 28 ma @ 24 VDC, 46 ma @ 12 VAC, 23 ma @ 24 VAC
Colour: white
Sensor maintenance: not required
Alarm relay rating: SPST, 100ma, 40VDC
Trouble relay: SPST, 100ma, 40VDC
Operating temperature range: 32° to 120° F
Alarm set point: per UL 1484 (25% LEL)

Installation & Operation Instructions

The following instructions are intended to serve as a guideline for the use of the Macurco GD-2B Combustible Gas Detector. It is not to be considered all- inclusive, nor is it intended to replace the policy and procedures for each facility.
WARNING
This detector helps monitor for the presence and concentration level of certain specified airborne gases. Misuse may produce an inaccurate reading, which means that higher levels of the gas being monitored may be present and could result in overexposure and cause sickness or death. For proper use, see the user manual, or contact Macurco Technical Support at 1-844-325-3050.

Mounting Location

A GD-2B is usually located in each room (except kitchens or bathrooms) where there are gas appliances or through which gas pipes pass. Do NOT mount the GD- 2B in a corner. Do NOT mount the GD-2B in kitchens or bathrooms – alcohol, ammonia, cleaning solvents, paint thinner, gasoline vapours, and aerosol propellants (aerosol cans such as hair spray usually contain a combustible gas) may cause alarms. Do NOT mount the GD-2B where the normal ambient temperature is below 32° F (0° C) or exceeds 120° F (50° C).
WARNING
This product is intended for use in ordinary indoor locations of family living units and office workspaces. The GD-2B is not designed to measure compliance with Occupational Safety and Health Administration (OSHA) commercial or industrial standards.

Installation

If the gas used is natural gas (methane) mount the GD-2B on a wall about one foot down from the ceiling. If the gas used is propane (LP), mount the GD-2B on a wall or column one foot above the floor. Use the same spacing as for smoke detectors- 30-foot centres, 900 square feet per detector.
As shipped, the GD-2B faceplate is mounted on the enclosure’s rear-housing component. This enclosure configuration allows the unit to be surface-mounted flush on a wall. Wiring is routed through an access area on the base of the rear housing.
A thin mid-plate enclosure component is also supplied with the GD-2B. Using the supplied screws, this mid-plate component is used to mount the GD-2B on a 2 x 4 inch (5.08cm x 10.16 cm) switch box – single-gang or “handy”, provided by the installer. The GD-2B’s faceplate component (with the detector attached) is then mounted on the mid-plate component.
Electrical connections to the GD-2B are made via the supplied six-conductor pigtail cable. The pigtail cable is first connected to the control panel wiring through wire nuts (refer to the diagrams for proper pigtail wiring). The pigtail cable’s connector then snaps into the mating connector on the back of the GD-2B detector, allowing easy installation and replacement of the GD-2B. For proper detector operation, ensure that the GD-2B is connected to a continuous source of power (not controlled by a wall switch). The GD-2B current draw figures represent worst-case conditions and will not vary as the applied DC voltage varies.
The alarm control panel zone inputs must be terminated with end-of-line resistors (E.O.L.R.), which are provided with the panel.
In the configuration, as shipped from the factory, the GD-2B is used with normally open initiating circuits. A jumper on the circuit board can be removed to use the GD-2B with normally closed initiating circuits. When using the GD-2B with normally closed initiating circuits, remove the blue jumper labelled “ALARM RELAY” on the top side of the printed circuit board under the buzzer.
See wiring diagram for information below on connections of the GD-2B. Macurco™ recommends a minimum of 22 AWG wire for runs up to 200 ft. (61 m), and 18 AWG wire for longer runs.
See wiring diagram and information below for connections of the GD-2B.
The alarm control panel zone inputs must be terminated with end-of-line resistors (E.O.L.R.), which are provided with the panel. The GD-2B has an optional internal audible sounder and should be connected to a Fire Alarm/Burglary Control Panel with an audible device that provides at least 85 dB of sound output. See the BUZZER option in the OPERATION section.

Power Up

Operation

Once the GD-2B is operational (ARMED) the green light will be on continuously. If gas is detected the red LED (ALARM) turns on and the SPST alarm relay activates to indicate the alarm condition.
In the configuration, as shipped from the factory, the GD-2B is self-restoring. When the air clears of gas, the red light turns off and the relay switches to its normal state. A jumper on the circuit board can be removed to allow the unit to latch in upon alarm. Once latched in, power will need to be interrupted to un-latch the alarm condition. The GD-2B can be modified, either before or after installation, to have a latching output. Locate the blue jumper labelled “LATCH IN” on the printed circuit board on the left-hand side under the buzzer. Remove this jumper and the unit will stay in alarm (once gas has exceeded the pre-set threshold) until the power is interrupted.
In the configuration, as shipped from the factory, the GD-2B has an internal audible sounder. A jumper on the circuit board can be removed to disable the internal audible sounder. If the jumper on the circuit board is removed the GD-2B should be connected to a Fire Alarm/Burglary Control Panel with an audible device that provides at least 85 dB sound output. The GD-2B can be modified, either before or after installation, to disable the internal audible sounder. Locate the blue jumper labelled “BUZZER” on the printed circuit board on the left-hand side under the buzzer. Remove this jumper to disable the internal audible sounder.
In the configuration, as shipped from the factory, the GD-2B is used with normally open initiating circuits. A jumper on the circuit board can be removed to use the GD-2B with normally closed initiating circuits. When using the GD-2B with normally closed initiating circuits, remove the blue jumper labelled “ALARM RELAY” on the top side of the printed circuit board under the buzzer.

Alarms
WARNING
When the unit is turned on it performs a self-test, which activates the audible and/or visual alarms. If the self-test fails, or all the alarms do not activate, do not use it and contact Technical Support at 1-844-325-3050.
The final alarm is determined by the configuration of the control panel, with the GD-2B only switching its relay to actuate the panel. Do not connect the GD-2B to Fire Alarm Circuits, or Burglar Alarm or other signals. The illumination of the red (ALARM) light on the GD-2B indicates the alarm condition. When an alarm occurs immediately evacuate the premises and seek assistance.
WARNING
Immediately exit the environment if there is an alarm condition on the detector.
In addition to the methane (natural gas) and propane (LP) gas that it is designed to detect, the GD-2B can also be affected by a broad range of combustible gases. Some of these that may cause an alarm are alcohol, ammonia, cleaning solvents, paint thinner, gasoline vapours, and aerosol propellants. Aerosol cans such as hair spray usually contain a combustible gas. Always make sure that there is adequate ventilation when you use these products. Proper location, not in kitchens or bathrooms, will minimize alarms due to normal use of household products.

Reset / Silence Switch

Trouble Indicator
Internal failure of the GD-2B will cause an open circuit in the normally closed (NC) Trouble Relay to provide for the actuation of the control panel circuits. The status LED will flash AMBER and the GD-2B buzzer will emit a short “chirp” (if the BUZZER is enabled) every 50 seconds. See the ERRORS section. The GD-2B microprocessor continuously monitors various detector parameters. Failure of the GD-2B’s internal power supply or a lack of power to the detector will result in the status light remaining OFF (not illuminated). In this case, the most common cause of detector trouble would be a break in the wiring between the control panel and the GD-2B.

End-Of-Life Indicator
Ten years after the GD-2B is installed the end-of-life signal will be activated indicating that the GD-2B has reached the end of its service life and needs to be replaced. The end-of-life signal will cause an open circuit in the normally closed (NC) Trouble Relay to provide actuation of the signal circuits. The status LED will flash alternate AMBER and OFF every 2 seconds and the GD-2B buzzer will emit a short “chirp” every 50 seconds (if the BUZZER is enabled). The end-of-life buzzer can be silenced for 48 hours by pressing the “TEST/RESET” button. The silencing of the buzzer also resets the Trouble Relay to the Normally Closed (NC) position. The silence function will continue to be available for 29 days after the GD-2B initiates an end-of-life signal.
After these 29 days, the GD-2B can no longer be silenced and must be replaced.

Errors
The GD-2B continuously monitors various internal operating parameters. If a problem is found, the unit will switch to Trouble mode. See the TROUBLE INDICATOR section. To reset the unit for normal operation, press the TEST/RESET switch, or remove power to the unit, wait a few seconds, and then re-apply unit power. If this problem persists, your detector may require repair. Contact the alarm panel installer or Macurco Tech Support for advice. If repair is required, return the unit to the manufacturer to comply with the warranty.
WARNING
This detector will only indicate the presence of combustible gas at the sensor. Combustible gas may be present in other areas. Accommodation spaces should be well-ventilated when household cleaning supplies or similar contaminants are used.

Maintenance

The GD-2B does not require regular maintenance. The unit uses a self-purging semi-conductor sensor that has a long life expectancy. All service and repair of the GD-2B are to be performed by Macurco. Macurco does not sanction any third-party repair facilities.
WARNING
Do not cover or obstruct the visual alarm LED. Doing so may adversely affect product performance.

Testing
The GD-2B should be tested monthly by pushing the TEST/RESET switch; see the TEST/RESET switch section. Normally this will be the only test required for the GD-2B and is the recommended way to test the unit or units after installation. All GD-2B units are factory-calibrated and 100% tested for proper operation. The unit also can automatically self-test and does so every 2 1/2-minute cycle. If the unit detects an improper voltage or inoperable component it will default into Trouble mode. See the TROUBLE INDICATOR section. Check that the GD-2B status indicator light is illuminated, (GREEN) continuously. If not, do not proceed with the tests. Though there is no field calibration procedure for this unit, there is an optional gas test procedure.

Field Test
Once the unit is fully operational (the green light is on steady), test the unit by directing gas from an unlighted butane cigarette lighter into the detector through one of the vent holes. It will be necessary to hold the lighter valve open for several seconds. The red light (ALARM) will turn on, the alarm relay switches and any devices connected should activate. The detector should be tested regularly by using gas from an unlit cigarette lighter, as detailed above.

Cleaning
The GD-2B should be cleaned using the soft brush attachment of your vacuum cleaner. The GD-2B should be tested after cleaning to ensure the unit is operating normally.

Sensor Poisons
The gas-sensing tip in the detector is designed with extreme sensitivity to the environment. As a result, the sensing function of the tip may deteriorate if it is exposed to a direct spray from aerosols such as paints, silicone vapours, etc., or to a high density of corrosive gases (such as hydrogen sulphide, sulphur dioxide) for an extended time.
CAUTION
Avoid the use of harsh cleaning materials, abrasives and other organic solvents. Such materials may permanently scratch the surfaces, and damage the sensor, labels or instrument housing.
If you have any doubts about the applicability of the equipment to your job situation, consult an industrial hygienist or contact Macurco Technical Support at 1-844-325-3050.

warranty

Macurco Gas Detection Product limited warranty
Macurco warrants the GD-2B gas detector will be free from defective materials and workmanship for two (2) years from the date of manufacture (stamped on the unit), provided it is maintained and used under Macurco’s instructions and/or recommendations. If any component becomes defective during the warranty period, it will be replaced or repaired free of charge, if the unit is returned under the instructions below. This warranty does not apply to units that have been altered or had repair attempted, or that have been subjected to abuse, accidental or otherwise. The above warranty is instead of all other express warranties, obligations or liabilities. THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED TO A PERIOD OF TWO (2) YEARS FROM THE PURCHASE DATE. Macurco shall not be liable for any incidental or consequential damages for breach of this or any other warranty, express or implied, arising out of or related to the use of said gas detector. A manufacturer or its agent’s liability shall be limited to replacement or repair as set forth above. Buyer’s sole and exclusive remedies are the return of the goods and repayment of the price, or repair and replacement of non- conforming goods or parts.