Maintenance - Macurco GD-2B User Instructions

MAINTENANCE

The GD-2B 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-2B 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.
TESTING
The GD-2B should be tested monthly by pushing the TEST/RESET switch; see
TEST/RESET switch section. Normally this will be the only test required for the GD-2B
and is the recommended way to test the unit or units after installation. All GD-2B units are
factory calibrated and 100% tested for proper operation. The unit also has the ability to
automatically self test and does so every 2 1/2 minute cycle. If the unit detects an
improper voltage or inoperable component it will default into Trouble mode. See
TROUBLE INDICATOR section. Check that the GD-2B status indicator light is illuminated,
(GREEN) continuously. If not, do not proceed with the tests. Though there is no field
calibration procedure for this unit, there is an optional gas test procedure.
GAS TEST
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 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 GD-2B should be cleaned using the soft brush attachment of your vacuum cleaner.
The GD-2B should be tested after cleaning to ensure the unit is operating normally.
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