GDC-350 Operation Manual
5909-9000 Rev 1
17
NOTE:
Reference photo on page 1 for location of LEDs and test-
buttons.
In the event of a gas build up beyond the preset low alarm trip point, the “Sen-1” LED
illuminates, the “Low” alarm level LED illuminates and the low alarm relay de-
energizes activating anything controlled by it. If a time delay “ON” has been set
(internal DIP switches), then the “Low” alarm LED will “flash” indicating the time delay
has been activated and the low alarm relay will not de-energize until the delay has
timed out. Once the low alarm relay has de-energized, it will re-energize
automatically once the gas alarm condition goes away, unless a time delay “OFF”
(minimum run time - internal DIP switches) has been programmed. The same
procedure applies to the second channel in the case of a two-channel (two-sensor)
system.
In the event of a gas build up beyond the preset high alarm trip point, the “Sen-1” LED
illuminates, the “High” alarm level LED illuminates and the high alarm relay de-
energizes activating anything controlled by it. If a time delay “ON” has been set
(internal DIP switches), then the “High” alarm LED will “flash” indicating the time delay
has been activated and the high alarm relay will not de-energize until the delay has
timed out. Once the high alarm relay has de-energized, it will re-energize
automatically once the gas alarm condition has dispatched. The same procedure
applies to the second channel in the case of a two channel (two sensor) system.
NOTE:
No minimum run time delay is provided for the high alarm relay.
4.2. Test Functions
A momentary test feature is provided to allow the user to test basic functionality of the
circuit. Press the UP push-button (internal) for 5 seconds, the audible alarm will beep
once to indicate it is in the 5 second test function. Release the UP push-button after
5 seconds and an automatic test function will occur.
Alternatively, use the silence push-button on the front door to perform the same
function.
The low alarm relay will de-energize and the low alarm LED on the front door will
illuminate. The low alarm relay will then re-energize while the low alarm LED stays lit
for 10 seconds.
Next, the high alarm relay will de-energize, the high alarm LED on the front door will
illuminate and the audible alarm will activate. The relay will then re-energize but the
high alarm LED and the audible alarm will stay activated for 10 seconds. After
10 seconds, everything resets to normal operating condition.
If a longer test sequence is desired, hold down the UP push-button for 10 seconds to
activate the low alarm relay, high alarm relay, low alarm LED, and high alarm LED for
15 minutes.