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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. 

LIST OF WARNINGS AND CAUTIONS  

 

 

Each person using this equipment must read and understand the information in these 

User Instructions before use.   Use 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. 

 

Use only for monitoring the gas which the sensor and detector are designed to 

monitor.  Failure to do so may result in exposures to gases not detectable and cause 
sickness or death
.  For proper use, see supervisor or User Instructions, or call 
Macurco Technical Service. 

 

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 and 
result in sickness or death

 

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 supervisor or User 
Instructions, 
or call Macurco Technical Service. 

 

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.  Failure to do so may 
adversely affect product performance and result in sickness or death. 

 

Immediately exit the environment if there is an alarm condition on the detector. Failure 

to do so may result in sickness or death. 

Summary of Contents for GD-2B

Page 1: ...alling 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 For proper use see User Instructions or call Macurco Technical Service ...

Page 2: ...r death For proper use see supervisor or User Instructions or call Macurco Technical Service 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 and result in sickness or death This detector helps monitor for the presence and concentration level of certain specified airborne gases Misuse may prod...

Page 3: ...onsult an industrial hygienist or call Macurco Technical Service USE INSTRUCTIONS AND LIMITATIONS Each person using this equipment must read and understand the information in these User Instructions before use Use 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 dea...

Page 4: ...e detector outside of this temperature range may adversely affect product performance and result in sickness or death 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 a SPST ...

Page 5: ...lity 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 supervisor or User Instructions or call Macurco Technical Service LOCATION A GD 2B is usually lo...

Page 6: ...ched is then mounted on the mid plate component 4 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 by means of 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 installati...

Page 7: ...e BUZZER option in the OPERATION section 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 Failure to do so may adversely affect product performance and result in sickness or death OPERATION 1 Once the GD 2B is operational ARMED the green light will be on continuously If gas is det...

Page 8: ...ove this jumper to disable the internal audible sounder 4 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 labeled ALARM RELAY on the top side the printed ...

Page 9: ...urn to normal operation 2 Pressing and holding the button will cause the buzzer to sound for two complete alarm cycles and LED turns red for 5 seconds and then to solid amber for 30 seconds The alarm relay is activated during the 30 seconds while LED is solid amber Button can be released once the solid amber is displayed 30 seconds after entering self test mode the alarm relay will turn off and th...

Page 10: ...ignal 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 fo...

Page 11: ...lso has the ability to 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 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 ...

Page 12: ...y 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 in lieu of all other express warranties obligations or liabilities THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE ARE LIMITED TO A PERIOD OF TWO 2 YEARS Macurco shall not be liable for any incidental or consequenti...

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