GAS Gasmaster, Installation, Operation And Maintenance Manual

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2.12.3. Testing fire channels
To test smoke detectors, inhibit the relevant FIRE
channel and use a smoke test aerosol to test each
detector on a loop in turn. The channel display will
indicate FirE when the detector activates.
Each detector on a loop should be reset before testing
the next to ensure that all detectors activate the alarm.
Heat detectors can be tested with a heat-gun using
the same method as described above.
Flame detectors can either provide a signal using
contacts, or a 4-20 mA signal.
A contact type detector will be connected as a
conventional fire loop using 470 Ω series resistors
and a 1K8 end of line resistor and will only indicate
FIRE or FAULT. A 4-20 mA detector will be connected
directly as a 4-20 input, and may have various alarm
levels to indicate UV or IR activation (please refer to
the instructions supplied with the device for details).
Flame detectors require a UV or IR torch (depending on
detector type) to simulate alarms. Inhibit the relevant
channel, shine the torch at the detector and check that
FIRE is shown on the Gasmaster display. For 4-20 mA
detectors, also check that the appropriate alarm level is
displayed.
2.12.4. Testing ESU channels
To test a channel monitoring an ESU sampling device,
inhibit the channel and manually slow the device,
check that Alarm Level 1 is activated.
Manually stop the device and check that Alarm Level 2
is activated. If the alarms do not activate the thresholds
may need changing, refer to section 3.10 for details on
how to change alarm levels.
When commissioning is complete ensure that the
system is left fully functional with no faults present
and no channels inhibited.
2. Installation