P
The Leader in Nitrogen Generation Technology
FPS-500 O&M Manual
Revision 2; 3/2020
Page
18
of
30
7.4. Stopping the System
To stop the system:
1. Close off the gas outlet valve on the nitrogen storage tank.
2. System will automatically stop once it reaches the cut-out pressure of approximately 65-75
PSIG.
3. In the case of an emergency shut off, push the on/Off toggle button on the upper left control
panel to the “Off” position. The unit will shut down immediately.
7.5. Power Loss Alarm Mode
The Power Loss Alarm activates when the nitrogen generator loses power for any reason. This will
cause the alarm contact to trigger.
Figure 7: FPS-500 Alarm Contact Diagram
7.6. Bypass Alarm (
Air n2
bypass
)
During the 30-minute fire protection piping system fill test, the operator can put the system in manual bypass
mode by turning the handle on the left side of th
e cabinet. With the handle in the “Bypass Mode”, the bypass
alarm triggers an audible and visual alarm “
Air n2
bypass
” on the screen. A dry contact is also available for
external notification such as the BMS (Building Monitoring System). The alarm will turn off once the handle
is back to normal run position.
7.7. BlastOff
®
Alarm (
BLAsstoff
9H.run
)
The system activates a BlastOff
®
Alarm when it detects potential leaks or nitrogen being overdrawn. The
“BlastOff
®
Leak Detection” is a patented feature which sends an alarm if it detects a possible gas leak. The
BlastOff
®
Alarm will trigger the audible buzzer, alarm contact, and flash “
BLAsstoff
9H.Run
” on the
controller’s 7-segment display, and dry contact connection to the “Building Management System’s (BMS)”.
Power cycle the unit to reset the alarm but avoid doing this multiple times without finding the cause as it will
shorten the g
enerator’s life.
Contact South-Tek System or your local installer for further troubleshooting.
