43
Nitrogen Generator Pressure Adjustments
The nitrogen generator cut-in (turn-on) and cut-out (turn-off) pressure settings are established and set as
part of the commissioning process of the nitrogen generator and do not need to be readjusted unless the
fire sprinkler system parameters change. Any adjustments to the nitrogen generator cut-in (turn-on) and
cut-out (turn-off) pressure settings will affect the Standard Vent (PAV-D/DQ) or SMART Vent (PSV-D/DE)
backpressure regulator settings, which will require readjusting the backpressure regulators to coincide
with the changes to the nitrogen generator cut-in (turn-on) and cut-out (turn-off) pressure settings.
NOTE: Any changes to the nitrogen generator cut-in and cut-out pressure settings or the vent
backpressure regulator settings must be authorized by and under the direction of ECS.
1. Nitrogen generator pressure adjustments are accomplished through the HMI display.
2. Adjust the nitrogen generator cut-in (turn-on) pressure. (See Maintenance Section for Nitrogen
Generator Pressure Adjustment Procedure).
3. Adjust the nitrogen generator cut-out (turn-off) pressure, if needed. (See Maintenance Section
for Nitrogen Generator Pressure Adjustment Procedure).
Nitrogen Generator Leak Monitor Alarm
The nitrogen generator and air compressor are designed to run for up to two (2) hours at a time when
filling all the systems with 3-5 psig (.2-.3 bar) of high purity nitrogen. If air compressor and nitrogen
generator runtimes are greater than four (4) hours, the nitrogen generator HMI displays a leak monitor
alarm, activates an audible alarm and activates the common trouble output contacts
Nitrogen Generator Start Up and System Check Instructions
Once the nitrogen generator has been programmed through the HMI, the nitrogen generator can be
started to verify nitrogen production and nitrogen purity.
1. Verify the nitrogen generator is in the “nitrogen generation mode”.
2. Verify the “fast fill” valves of all appropriate air maintenance devices (AMD)’s are closed.
3. Close the regulated valve of all appropriate air maintenance device (AMD)’s.
4. Turn on the nitrogen generator (if nitrogen generator is not already on).
5. Open the nitrogen production flow meter isolation ball valve to automatically start the nitrogen
generator to generate nitrogen.
NOTE: The nitrogen generator incorporates an eight (8) second delay upon nitrogen generator
start for protection of the integral air compressor.
6. Allow the nitrogen generator to operate in the nitrogen production mode for approximately
five (5) minutes to allow the nitrogen generator to obtain optimum operating temperature.
NOTE: Operating nitrogen generator with the door closed during initial start-up reduces time
required for nitrogen generator to obtain optimum operating temperature.
7. Connect the Handheld Gas Analyzer to the quick connect gas sampling port in the nitrogen
generator to verify the nitrogen purity is 98%.
NOTE: Prior to connecting the Handheld Gas Analyzer to the nitrogen generator, calibrate the
Handheld Gas Analyzer using the calibration procedures. (See Maintenance Section for
Nitrogen Purity Check Procedure).
8. The nitrogen purity was verified to be producing 98% nitrogen purity prior to equipment shipment
from ECS. Should the purity not be 98%, Contact ECS prior to making changes to the nitrogen
purity.
To Next Page
Loading...
Need help?
General
