GDC-350 Operation Manual
16
5909-9000
Rev
1
3.12. Installation Example 4: Type “E” with Two On-Board Sensors
Figure 3-10. Sample Type “E” Installation
3.13. Powering On the GDC-350
Upon application of power, the green LED light indicator(s) will illuminate and the LED
between CH-1 and CH-2 will be blinking but all alarms are disabled for 2 minutes for a
system warm up period. After the warm up period, the system may exhibit gas alarm
condition(s) if one or both of the sensors has not completely stabilized during the
warm up period. This is normal and the length of time the gas alarms exist is
dependent upon the length of time since the unit was last powered up and the state of
the environment it is installed in. After warm up, only the green power LED
illuminates indicating normal operation and the relays are energized indicating normal
“Fail-safe” status.
4. CONFIGURATION AND OPERATION
4.1. General
In the event of a burned-out, damaged or missing solid-state sensor element, the
controller will indicate fail condition on the front door by illumination of the red fail
LED. At this point, both system relays will have reversed state (de-energized) and
anything connected to them will be running continuously. Normal system operation
will not occur until the fault condition has been rectified. The same condition will
occur if the 4-20 mA signal from the remote transmitter is broken or interrupted.
NOTE:
Fail condition overrides any system time delays that may have
been set.
