Page 57 - NG-1 100, NG-1 250, NG-1 500 - Wall-Mounted Nitrogen Generator System Installation Manual

Nitrogen Generator Flow Rates
NG-1 100 Wall Mount w/ Integral Air Compressor NG-1 250 Wall Mount w/ Integral Air Compressor NG-1 500 Wall Mount w/ Integral Air Compressor NG-1 1000 Skid Mount w/ Integral Air Compressor NG-1 1150 Stand Alone w/ 5 hp Air Compressor NG-1 1500 Stand Alone w/ 7.5 hp Air Compressor NG-1 2000 Stand Alone w/ 7.5 hp Air Compressor NG-1 3000 Stand Alone w/ 10 hp Air Compressor
150 (70.8)
198 (93.5) 342 (161.4) 600 (283.2) 858 (404.9) 1,458 (688.1) 1,458 (688.1) 2,100 (991.1)
20 (9.4) N/A N/A N/A N/A N/A N/A N/A
N/A
27 (12.7) N/A
76 (35.9) 130 (61.4) 130 (61.4) 225 (106.2) 285 (134.5)
N/A
N/A
44 (20.8) N/A 240 (113.3) 240 (113.3) 425 (200.6) 550 (259.6)
Nitrogen Generator
Production Rate – SCFH (L/min)
Bypass Mode
70 psig (4.8 bar)
Nitrogen Generation Mode
100 psig (6.9 bar)
150 psig (10.3 bar)
NOTE: If production flow rate is lower than flow rates in the production chart, check pressure regulator of the excess bleed off assembly.
If production flow rate identified and documented varies more than 10% of the flow rates in the production chart, contact Johnson Controls.
Air Maintenance Device (AMD) Pressure Adjustment Procedure
The sprinkler system air maintenance device (AMD) operating pressures are determined by the sprinkler system valve, system water pressure and water delivery time requirements as defined by NFPA 13. The AMD operating pressures should not need to be readjusted unless one of the above fire sprinkler system parameters change.
The following procedure has been developed to account for:
1. 2. 3.
NOTES:
Tolerances of the gauges used on fire sprinkler systems
Inlet pressure fluctuations to the AMD resulting in pressure fluctuations of the AMD.
Interaction between AMDs when multiple sprinkler systems are connected to a single nitrogen generator.
• When the nitrogen generator is connected to multiple dry pipe and preaction systems, the fire sprinkler systems must operate at the same supervisory gas pressure.
• Any changes to the AMD pressure settings must be correlated with the nitrogen generator cut-in (turn-on) and cut-out (turn-off) pressure settings; and be authorized by and under the direction of Johnson Controls.
• Accuracy of pressure gauges typically used in the fire sprinkler industry can vary as much as 8-12 psi (.6-.8 bar) (See Operational Information - Sprinkler System Gauge Accuracy).
Determine the operating pressure for all AMDs connected to a single nitrogen generator. The operating pressure must be the same for all AMDs.
TFP1273 Page 56 of 80