1 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. Instal...
2 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 th...
3 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 m...
4 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 ...
5 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 pound 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 @ 2...
6 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), mo...
7 7. 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 m...
8 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 ...
9 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...
10 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. ...
11 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. Do not disassemble unit...
12 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 ...
