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Macurco GD-2A Operation Manual
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.
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 GD-
2A. 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.
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.
REV – 1.0.0
WARNING
WARNING
[34-8706-2454-0 ]
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