4.When using the
5.See wiring diagram and information below for connections of the
UL 2075 Requirements - 12.4.1 Power supply leads provided for field connection shall not be less than 6 inches (152 mm) long, provided with strain relief, and shall be no smaller than 18 AWG (0.82 mm2). The insulation, when thermoplastic, shall not be less than 1/32 inch (0.8 mm) thick.
Exception No. 1: A lead is not prohibited from being less than 6 inches long when it is evident that the use of a longer lead results in damage to the insulation.
Exception No. 2: Solid copper leads as small as 26 AWG (0.13 mm2) are not prohibited from use when:
A.The current does not exceed 1 ampere for lengths up to 2 feet
(61 cm) and the current does not exceed 0.4 ampere for lengths from 2 feet (61 cm) up to 10 feet (3.05 m);
B.There are two or more conductors and they are covered by a common jacket, or the equivalent; and
C.The assembled conductors comply with the requirements of the Strain Relief Tests, Section 18.
12.4.2Leads provided for field connection to power limited signaling circuits, such as those employed for connection to remote signaling devices, shall not be smaller than 16 AWG (1.3 mm2), for a single conductor; 19 AWG
(0.65 mm2) for two or more conductors; and 26 AWG (0.13 mm2) for four or more conductors of a
(0.82 mm2) and larger conductors.
TYPICAL CONNECTION OF TWO GD-2A TO AN ALARM CONTROL PANEL
Alarm Control Panel |
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N.O. initiating |
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| E.O.L.R. | ||
| alarm |
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| alarm | ||
circuit |
| SPDT |
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| SPDT |
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Battery |
| relay |
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| relay |
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24VDC Power supply. |
| Trouble |
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| Trouble |
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Fuse or current limit at | POWER 12/24V |
| POWER 12/24V |
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relay N.C. |
| relay N.C. |
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1.0VA for each |
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6.The
7.A switching regulator is used to efficiently match the wide input voltage range to the fixed, internal power system. As a result the power consumption is fairly constant at about 0.75 watts in normal operation, and 1.0 watt in alarm.
8.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
POWER UP
WWARNING
When the unit is powered up it performs a
When power is first applied to the detector, it will go through a
OPERATION
1.Once the
2.In the configuration, as shipped from the factory, the
•The
3.The
ALARMS
WWARNING
Immediately exit any environment if there is an alarm condition on the detector.
Failure to do so may result in sickness or death.
The final alarm is determined by the configuration of the control panel, with the
In addition to the methane (natural gas) and propane (LP) gas that it is designed to detect, the
WWARNING
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.
TROUBLE INDICATOR
The trouble signal is determined mostly by the configuration of the alarm panel, with the
WWARNING
Do not cover or obstruct visual alarm LED. Doing so may adversely affect product performance and result in sickness or death.
MAINTENANCE
WWARNING
Do not disassemble unit or attempt to repair or modify any component of this instrument. This instrument contains no user serviceable parts, and substitution of components may impair intrinsic safety which may adversely affect product performance and result in sickness or death.
The
TESTING
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 near the left hand side 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
SENSOR POISONS
The gas sensor tip in the detector is designed with extreme sensitivity to the environment. As a result, the gas sensor 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.
3M FIXED GAS DETECTION PRODUCTS LIMITED WARRANTY
3M warrants the
unit is returned in accordance with 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 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 FROM THE PURCHASE DATE. 3M 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. Manufacturer or its agent’s liability shall be limited to replacement or repair as set forth above. Buyer’s sole and exclusive remedies are return of the goods and repayment of the price, or repair and replacement of
FOR MORE INFORMATION
In United States, contact:
Website: www.3M.com/OccSafety
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