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The Leader in Nitrogen Generation Technology
FPS-900-RS O&M Manual
Version: 3; 3/2020
Page 15 of 28
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
pan
el to the “Off” position. The unit will shut down immediately.
7.5. Alarm Mode
when an alarm mode is activated, it will trigger the audible buzzer, alarm contact, and flash the
cause of the alarm on the screen. The customer alarm contact wiring can be viewed on the
supplied wiring diagram. The customer alarm dry contact is constantly energized and will
constantly illuminate the LED indicator on top of the contact. This is so when there is no power, or
power is lost on the system, the contact will de-energize and show a fault condition. The alarm
contact has a max rating of 6A at 250VAC and 2A at 24VDC.
Figure 2: FPS-900-RS Alarm Contact Diagram
7.5.1. Bypass Mode (
Air n2
bypass
)
during the 30-minute fire protection system fill test or when a potential issue with the
generator is detected, the operator can switch the system into manual bypass mode by
turning the handle on the 3-way ball valve to the bypass position. With the handle in the
“Bypass Mode”, the bypass alarm triggers the audible buzzer, alarm contact, and flashes
“
Air n2
bypass
” on the controller’s 7-segment display. The alarm will turn off once the
handle is back to normal run position.
7.5.2. BlastOff
®
Alarm Mode (
BLAsstoff
9H.run
)
The nitrogen generator activates a BlastOff
®
Alarm when it detects potential leaks or nitrogen
being overdrawn. The BlastOff
®
Alarm will trigger the audible buzzer, alarm contact, and
flash “
BLAsstoff
9H.Run
” on the controller’s 7-segment display. Inspect and test the system
