Normal Run/Standby Mode (run/StdbY)
“Run” mode is when the FPS-900-RS is producing ni-
trogen and supplying it to the storage tank. The system will
automatically enter “Standby” mode when the tank is fully
pressurized (70 PSIG ±5 PSIG). It will remain in “Standby”
mode until the tank pressure falls 7-10 psig.
To run the system in normal run mode:
1. Connect power to the system.
2. Open the nitrogen generator’s 3-way outlet ball
valve to nitrogen-out position.
3. On the nitrogen tank, open the gas inlet valve.
4. Push the On/Off toggle button on the upper right
control panel to the “On” position (up) and the sys-
tem will automatically turn on and start filling the
storage tank with nitrogen.
To stop the system:
1. Switch the nitrogen generator’s 3-way outlet ball
valve to the bypass position.
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.
Alarm Mode
When an alarm mode is activated, it will trigger the au-
dible 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 illu-
minate 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.
Bypass Mode (BPASS)
During the 30-minute fire protection piping system fill test
or an 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 “BPASS” on
the controller’s 7-segment display. The alarm will turn off
once the handle is back to normal run position.
BLASTOFF® Alarm Mode (B-Off)
The nitrogen generator activates a BlastOff® Alarm when it
detects potential leaks or nitrogen being overdrawn. The Blast-
Off® Alarm will trigger the audible buzzer, alarm contact, and
flash “B-OFF” on the controller’s 7-segment display. Inspect
and test the system for leaks and component failures. Power
cycle the unit to reset the alarm but avoid doing this without
finding the cause, as it will shorten the generator’s life. Contact
South-Tek System or the local installer for further troubleshoot-
ing.
Low System Pressure Alarm Mode (Lo-n2)
The low system pressure alarm activates when a sys-
tem pressure is detected below the normal functioning limits
of the nitrogen generator. This may be from an issue with
the generator, a supply valve being shut off, or caused by a
large leak in the fire protection system.
Power Loss Alarm Mode (-----)
The Power Loss alarm activates when the nitrogen gen-
erator loses power for any reason. This will cause the alarm
contact to trigger.
Filter Replacement Alarm Mode (FILTr)
Once the generator has been running for 1000 hours or
more, the filter replacement alarm will activate. Replace the
filters according to Section 9 Maintenance. After replacing
the filter elements, press and hold the Filter Change Reset
Button for 7 seconds. An audible beep will confirm that the
time is reset, and filter alarm will shut off if it is active. (Note:
resetting this will also trigger the Customer Alarm Relay for
one second)
Start-up Procedures
Use caution when working with pressurized gas. Always
leak check every line before using the system.
Note:
Line
leaks will cause the N2-Blast
®
FPS-900-RS to run exces-
sively, shortening its life and possibly causing excessive
wear on the compressor.
1. Visually inspect the unit to ensure no damage occurred
during shipping and handling.
2. Check the power connection is correct.
3. Turn the 3-way ball valve on the system output to the
“Bypass” position.
4. Open the inlet ball valve on the nitrogen storage tank if
it is closed.
5. Push the power button on the top left of the cabinet to
the “On” position (up). The air compressor will power
on if the storage tank is under pressurized. If neither the
compressor nor PLC display power on, check the wiring
and supply power to the generator.
6. Once the system is running, the pressure gauge will in-
crease to 65-70 PSIG within 30 minutes or less. While it
is running, check the system for leaks to ensure proper
functionality.
a. Once it reaches 65-70 PSIG, the system will enter
“Standby” mode and automatically shut off the inter-
nal air compressor. Check the controller on the control
panel for the “StdbY” display.
b. Once in standby, note the pressure reading on the
tank pressure gauge. Monitor the pressure for the next
5 minutes for any loss in pressure. If there is a pressure
drop, check for leaks around connection fittings, other
-
wise proceed to the next step.
7. Switch the 3-way ball valve on the system output to the
“Nitrogen Out” position and the system will turn on and
fill the storage tank with nitrogen.
8.
Completely fill the storage tank and allow the nitrogen
generator to go into standby mode.
9. Once in standby mode, monitor the tank pressure gauge
for 5 minutes and ensure no significant leaks are in the
sprinkler system.
11.
Summary of Contents for N2-Blast DDX-LP PrePaK
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