Operation - Macurco GD-2B User Instructions

7. See wiring diagram for information below on connections of the GD-2B. Macurco™
recommends a minimum of 22 AWG wire for runs up to 200 ft. (6096 m), and 18 AWG
wire for longer runs.
8. See wiring diagram and information below for connections of the GD-2B.
9. 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-2B has an optional internal
audible sounder and should be connected to a Fire Alarm/Burglary Control Panel with
an audible device that provides at least 85 DB sound output. See 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 detected the red LED (ALARM) turns on and the SPST alarm relay activates to
indicate the alarm condition.
2. In the configuration, as shipped from the factory, the GD-2B is self-restoring. When the
air clears of gas, the red light turns off and the relay switches to its normal state. A
jumper on the circuit board can be removed to allow the unit to latch in upon alarm.
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