MaCURCO GD-2A Combustible Gas Detector Instruction manual

Macurco™ GD-2A
Combustible Gas Detector
Installation & Operation Manual
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. For proper use see User Instructions or call Macurco
Technical Service.
Macurco GD-2A Operation Manual
1
General Safety Information ................................................................................................................................ 3
1.1
List of warnings.......................................................................................................................................... 3
Use Instructions and Limitations......................................................................................................................... 4
2.1
Use For...................................................................................................................................................... 4
2.2
Do NOT use for .......................................................................................................................................... 4
2.3
Features .................................................................................................................................................... 5
2.4
Specifications............................................................................................................................................. 5
3 Installation and Operating Instructions ............................................................................................................... 5
3.1
Location .................................................................................................................................................... 5
3.2
Installation................................................................................................................................................. 6
4 Operation ......................................................................................................................................................... 7
4.1
Power Up .................................................................................................................................................. 7
4.2
Alarms ...................................................................................................................................................... 8
4.3
Trouble Indicator ....................................................................................................................................... 9
4.4
End-Of-Life Indicator .................................................................................................................................. 9
5 Maintenance..................................................................................................................................................... 9
5.1
Cleaning .................................................................................................................................................... 9
5.2
Sensor Poisons .......................................................................................................................................... 9
6 Testing............................................................................................................................................................ 10
7 Macurco Gas Detection Product limited warranty ............................................................................................. 11
Technical Support Contact Information ............................................................................................................................... 11
General Contact Information ................................................................................................................................................ 11
2
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1 General Safety Information
1.1
List of warnings
WARNING
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-2A 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.
This product is intended for use in ordinary indoor locations of family living units and
office workspaces. The GD-2A is not designed to measure compliance with Occupational
Safety and Health Administration (OSHA) commercial or industrial standards.
When the unit is powered up it performs a self-test during which the green LED light will
blink for a period of one and one half to two minutes. Afterward, the green LED light will
turn on continuously to indicate the unit is in normal operation (ARMED). If the self-test
fails or the green LED light does not turn on continuously 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.
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.
This detector contains no user serviceable parts, and substitution of components may
adversely affect product performance and result in sickness or death.
CAUTION
Avoid the use of harsh cleaning materials, abrasives and other organic solvents. Such
materials may permanently scratch the surfaces, 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 call Macurco Technical Service.
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2 Use Instructions and Limitations
The GD-2A is a low voltage (12-24 VAC or VDC) electronic detector of combustible, heating type
gases, that has been evaluated by ETL for methane (natural gas) and propane (LP) gas. The GD2A is designed for connection to Fire Alarm/Burglary Control Panels. The GD-2A has a SPDT
Alarm relay, for connection to control panels or other devices. The GD-2A does NOT detect carbon
monoxide. The GD-2A does not have an internal audible sounder.
WARNING
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.
2.1
Use For
The GD-2A 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-2A 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 exposures to gases not detectable and cause sickness or
death. For proper use, see supervisor or User Instructions, or call Macurco Technical
Service.
2.2
Do NOT use for
The GD-2A is NOT intended for use in industrial applications such as refineries, chemical plants,
etc. The GD-2A does NOT detect carbon monoxide. Do NOT mount the GD-2A in a corner. The
GD-2A is designed for connection to Fire Alarm/Burglary Control Panels. Do not connect the GD2A 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-2A in kitchens or bathrooms - alcohol’s, ammonia, cleaning solvents, paint
thinner, gasoline vapors, and aerosol propellants (aerosol cans such as hair spray usually contain
a combustible gas) may cause nuisance alarms.
WARNING
GD-2A 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.
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2.3
Features
•
•
•
•
•
•
•
•
•
2.4
Listed to UL standard 2075 for the standard for safety for gas and vapor detectors and sensors
Sensitivity tested based on UL 1484 standard for residential gas detectors
Detects heating gases: propane (LP) and natural gas (methane)
SPDT alarm and N.C. trouble relays
Can be self-restoring or latching
Electronic sensors: no maintenance or recalibration
Temperature compensated
Simple installation and operation
Supervised sensor
Specifications
•
•
•
•
•
•
•
•
•
•
•
Size: 4 ½ X 5 X 1 5/8 inches
Shipping weight: 0.54 pound
VOLTAGE: 12 to 24 VAC or VDC
Current (non-alarm): 45 mA @ 12 VDC, 22 mA @ 24 VDC, 65 mA @ 12 VAC, 45 mA @ 24VAC
Current (in alarm): 70 mA @ 12 VDC, 35 mA @ 24 VDC, 100 mA @ 12 VAC, 65 mA @ 24 VAC
Color: White
Sensor maintenance: Not required
Alarm relay rating: 0.125 AMPS, 40V, 3VA
Trouble relay: 0.250 AMPS, 40V, 10VA
Operating temperature range: 32° to 120° F
Alarm set point: Per UL 1484 (25% LEL)
3 Installation and Operating Instructions
The following instructions are intended to serve as a guideline for the use of the Macurco GD-2A
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 supervisor or User Instructions, or call
Macurco Technical Service.
3.1
Location
A GD-2A is usually located in each room (except kitchens or bathrooms) where there is gas
appliances or through which gas pipes pass. Do NOT mount the GD-2A in a corner. Do NOT
mount the GD-2A in kitchens or bathrooms - alcohols, ammonia, cleaning solvents, paint thinner,
gasoline vapors, and aerosol propellants (aerosol cans such as hair spray usually contain a
combustible gas) may cause alarms. Do NOT mount the GD-2A where the normal ambient
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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.
3.2
Installation
1. If the gas used is natural gas (methane) mount the GD-2A on a wall about one foot down from the ceiling. If
the gas used is propane (LP), mount the GD-2A on a wall or column one foot above the floor. Use the same
spacing as for smoke detectors- 30-foot centers, 900 square feet per detector.
2. The three-part plastic case allows the GD-2A to be either surface mounted or installed over a four-inch
square or double gang electrical box, providing a near flush mount. The GD-2A snap on front cover will need
to be removed before installation. To remove it, lightly pry the front cover off of the mounting plate (middle
section) with a coin or flat screwdriver inserted into the vent at the bottom. The cover will snap off exposing
the electronics and mounting plate.
3. For flush mount, remove the 2 screws and rear cover from the mounting plate and use the appropriate holepattern for installation. The four holes toward the center of the mounting plate match the hole- pattern of a
double gang electrical box. The four holes near the corners match the pattern of a four-inch square box.
Mount the GD-2A so the “TOP” marked side of the mounting plate is at the highest side. Snap the front
cover back on when finished, making sure that the lights line up with the access holes.
4. When using the GD-2A with normally closed initiating circuits, use the Com. and N.C. alarm relay
connections.
5. See wiring diagram and information below for connections of the GD-2A.
• 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 (0.8mm) 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:
o 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 up to 10 feet (3.05 m);
o There are two or more conductors, and they are covered by a common jacket, or the equivalent;
and
o The assembled conductors comply with the requirements of the Strain Relief Tests, Section 18.
6. The GD-2A uses a full wave bridge rectifier at its power input, so that it is independent of the polarity of the
input power. It can operate on DC or AC voltages between 12 and 24 volts.
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 GD-2A does not have an internal audible sounder and must be connected to a
Fire Alarm/Burglary Control Panel with an audible device that provides at least 85 dB sound output.
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Figure 3-1 – Connection of a single GD-2A to an alarm control panel
Figure 3-2 – Connection of multiple GD-2A to an alarm control panel
4 Operation
WARNING
When the unit is powered up it performs a self-test during which the green LED light
blinks for a period of one and one half to two minutes. Afterwards, the green LED light
will turn on continuously to indicate the unit is in normal operation (ARMED). If the selftest fails or the green LED light does not turn on continuously do not use. Failure to do
so may adversely affect product performance and result in sickness or death.
4.1
Power Up
When power is first applied to the detector, it will go through a warm-up period of two and one-half minutes, during
which alarms are inhibited. The green LED light will turn on and off during the delay period. The green light will turn
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1. Once the GD-2A is operational (ARMED) the green light will be on continuously. If gas is detected the red
LED (ALARM) turns on and the SPDT alarm relay activates to indicate the alarm condition.
2. In the configuration, as shipped from the factory, the GD-2A is self-restoring. When the air clears of gas, the
red light turns off and the relay switches to its normal state. A jumper wire on the circuit board can be
clipped to allow the unit to latch in upon alarm. Once latched in, power will need to be interrupted to unlatch the alarm condition.
3. The GD-2A can be modified, either before or after installation, to have a latching output. Pull off the cover
and locate the jumper wire labeled “CLIP FOR LATCH IN” on the printed circuit board in the upper right-hand
side. Clip or cut this jumper wire and separate the wire ends. Now the unit will stay in alarm (once gas has
exceeded the pre-set threshold) until the power is interrupted. When replacing the cover, make sure the
lights line up with their access holes.
4. The GD-2A has a supervisory circuit of critical functions. A trouble condition, due to failure of a non-reliable
component, results in both lights switching on and off and the normally closed trouble relay opening. A
power failure also causes the trouble relay to open.
4.2
Alarms
WARNING
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 GD-2A only switching its relay to
actuate the panel. Do not connect the GD-2A to Fire Alarm Circuits, or Burglar Alarm or other signals. The
illumination of the red (ALARM) light on the GD-2A indicates the alarm condition. When an alarm occurs
immediately evacuate the premises and seek assistance.
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.
In addition to the methane (natural gas) and propane (LP) gas that it is designed to detect, the GD-2A 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,
• 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.
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4.3
Trouble Indicator
The trouble signal is determined mostly by the configuration of the alarm panel, with the GD-2A trouble relay only
providing an open circuit for actuation. A failure of the gas-sensing element will result in both lights turning on and
off and the trouble relay opening. Failure of power supplies in the GD-2A or a lack of power to the detector will
result in the trouble relay opening. The most common expected trouble would be a break in the wiring between the
panel and the GD-2A. When a trouble signal occurs call the alarm panel installer for assistance.
WARNING
Do not cover or obstruct visual alarm LED. Doing so may adversely affect product
performance and result in sickness or death.
4.4
End-Of-Life Indicator
5 years after the GD-2A is installed the end-of-life signal will be activated indicating that the GD-2A 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 close
(NC) Trouble Relay to provide actuation of the signal circuits. The green LED will remain steady and red LED will flash
every second to indicate end-of-life signal. End-of-life signal can be silenced for 48 hours by resetting power of GD2A. End-of-life signal also resets the Trouble Relay to the Normally Closed (NC) position and LED will also be reset.
The silence function will continue to be available for 29 days after the GD-2A initiates an end-of-life signal. After this
29-day period, the GD-2A can no longer be silenced and must be replaced.
5 Maintenance
The GD-2A 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-2A are to be performed by Macurco. Macurco does not
sanction any third-party repair facilities.
WARNING
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.
5.1
Cleaning
The GD-2A should be cleaned using the soft brush attachment of your vacuum cleaner. The GD-2A should be tested
after cleaning to ensure the unit is operating normally.
5.2
Sensor Poisons
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.
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6 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.
7 Macurco Gas Detection Product limited warranty
Macurco warrants the GD-2A gas detector will be free from defective materials and workmanship for a period of two
(2) years from the date of manufacture (indicated on inside cover of the GD-2A), provided it is maintained and used
in accordance with Macurco 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 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. 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. The 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.
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Macurco Gas Detection
1504 W 51st St
Sioux Falls, SD 57105
Technical Support Contact Information
General Contact Information
Phone: 1-844-325-3050
Fax: 1-605-951-9616
Email: [email protected]
Website: www.macurco.com/support/
Phone : 1-877-367-7891
Fax : 1-605-951-9616
Email : [email protected]
Website: www.macurco.com
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Issue Date: 1.18.2023
Document No: 34-8706-2454-0
© Macurco 2023. All rights reserved.
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