Macurco™ GD-2B Combustible Gas Detector User Instructions 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 in accordance with these User Instructions may adversely affect product performance and result in sickness or death.
GENERAL SAFETY INFORMATION INTENDED USE 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.
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 visual alarm LED. Doing so may adversely affect product performance and result in sickness or death. Do not disassemble unit or attempt to repair or modify any component of this detector.
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.
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.
The GD-2B is not designed to measure compliance with Occupational Safety and Health Administration (OSHA) commercial or industrial standards. INSTALLATION 1. 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- 30foot centers, 900 square feet per detector. 2.
. 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. (6096 m), and 18 AWG wire for longer runs. 8. See wiring diagram and information below for connections of the GD-2B. 9. The alarm control panel zone inputs must be terminated with end of line resistors (E.O.L.R.), which are provided with the panel.
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 labeled “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. 3. In the configuration, as shipped from the factory, the GD-2B has an internal audible sounder.
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 vapors, 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.
TROUBLE INDICATOR Internal failure of the GD-2B will cause an open circuit in the normally closed (NC) Trouble Relay to provide for 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 ERRORS section. The GD-2B microprocessor continuously monitors various detector parameters.
MAINTENANCE The GD-2B does not require regular maintenance. The unit uses a self-purging semiconductor 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. Do not disassemble unit or attempt to repair or modify any component of this instrument.
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 vapors, etc., or to a high density of corrosive gases (such as hydrogen sulfide, sulfur dioxide) for an extended period of time.
