Page 61 - NG-1 100, NG-1 250, NG-1 500 - Wall-Mounted Nitrogen Generator System Installation Manual

Nitrogen Generator Pressure Adjustment Procedure
The nitrogen generator cut-in (turn-on) and cut-out (turn-off) pressure settings are established and set during 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 and cut-out pressure settings will affect the TYCO TAV-D Vent or TSV-D SMART Vent backpressure regulator settings, which will require readjusting the backpressure regulators to coincide with the changes to the nitrogen generator cut-in and cut-out pressure settings. (Pressure Transducer Location, See Generator Configuration Diagram)
NOTE: Any changes to the nitrogen generator cut-in and cut-out pressure settings or the vent backpressure regulator settings are to be authorized by and under the direction of Johnson Controls.
Cut-In Pressure Adjustment
1. Locate the Pressure Transducer inside the nitrogen generator cabinet.
2. Depress and hold the “DOWN” (right) key for a minimum of two (2) seconds to enter Programming Mode
(“Set Hold Key!” will be displayed followed by the cut-out (SP) pressure displayed).
3. Depress the “DOWN” (right) key on the Pressure Transducer to display the cut-in (RP) pressure
4. Depress the “ENTER” key (the cut-in (RP) pressure will “Flash”).
5. Using the “UP” or “DOWN” key change the cut-in (RP) pressure until the desired pressure is displayed on the LCD screen.
6. Depress the “ENTER” key.
7. Depress both the “UP” or “DOWN” keys simultaneously to exit the Programming Mode and return to the Display Mode.
Cut-Out Pressure Adjustment
1. Locate the Pressure Transducer inside the nitrogen generator cabinet.
2. Depress and hold the “DOWN” (right) key for a minimum of two (2) seconds to enter Programming Mode
(“Set Hold Key!” will be displayed followed by the cut-out (SP) pressure displayed).
3. Depress the “ENTER” key (the cut-out (SP) pressure will “Flash”).
4. Using the “UP” or “DOWN” key change the cut-out (SP) pressure until the desired pressure is displayed on the LCD screen.
5. Depress the “ENTER” key.
6. Depress both the “UP” or “DOWN” keys simultaneously to exit the Programming Mode and return to the Display Mode.
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