Macurco GD-2A Operation Manual
REV – 1.0.0
[34-8706-2454-0 ]
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2.3
Features
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Listed to UL standard 2075 for the standard for safety for gas and vapor detectors and sensors
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Sensitivity tested based on UL 1484 standard for residential gas detectors
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Detects heating gases: propane (LP) and natural gas (methane)
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SPDT alarm and N.C. trouble relays
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Can be self-restoring or latching
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Electronic sensors: no maintenance or recalibration
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Temperature compensated
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Simple installation and operation
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Supervised sensor
2.4
Specifications
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Size: 4 ½ X 5 X 1 5/8 inches
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Shipping weight: 0.54 pound
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VOLTAGE: 12 to 24 VAC or VDC
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Current (non-alarm): 45 mA @ 12 VDC, 22 mA @ 24 VDC, 65 mA @ 12 VAC, 45 mA @ 24VAC
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Current (in alarm): 70 mA @ 12 VDC, 35 mA @ 24 VDC, 100 mA @ 12 VAC, 65 mA @ 24 VAC
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Color: White
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Sensor maintenance: Not required
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Alarm relay rating: 0.125 AMPS, 40V, 3VA
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Trouble relay: 0.250 AMPS, 40V, 10VA
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Operating temperature range: 32° to 120° F
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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
