Page 59 - NG-1 100, NG-1 250, NG-1 500 - Wall-Mounted Nitrogen Generator System Installation Manual

Step 8a: Step 8b: Step 9:
Step 10a: Step 10b: Step 11:
• If the pressure indicated on the pressure transducer digital display at the transition (gradual increase to rapid increase) is the sprinkler system’s target pressure, proceed to Step 9.
• If the pressure indicated on the sprinkler system’s air pressure gauge at the transition (gradual increase to rapid increase) is LESS THAN the sprinkler system’s target pressure, proceed to Step 8a.
• If the pressure indicated on the sprinkler system’s air pressure gauge at the transition (gradual increase to rapid increase) is MORE THAN the sprinkler system’s target pressure, proceed to Step 8b.
If the pressure on the sprinkler system’s air pressure gauge is LESS THAN the target operating pressure, increase the pressure setting of the AMD by 1⁄4 of a turn increment (cw) (increment can be different at discretion of operator) and return to Step 5.
If the pressure on the sprinkler system’s air pressure gauge is MORE THAN the target operating pressure, decrease the pressure setting of the AMD by 1⁄4 of a turn increment (ccw) (increment can be different at discretion of operator) and return to Step 4.
Repeat Steps 5, 6 and 7 to verify that the operating pressure readings are consistent.
• If the pressure reading is as expected, mark the location of the indicator on the sprinkler system air pressure gauge of the system being tested (and on the AMD pressure gauge if
applicable).
Other sprinkler systems not tested - If there is another system supplied by the nitrogen generator, proceed to that system and return to Step 2.
No other sprinkler systems to test - If there are no other systems supplied by the nitrogen generator to be tested, proceed to Step 11.
Test operation of nitrogen generator with all sprinkler systems operating.
• Confirm AMD fast fill (bypass) valve(s) are closed and the regulated valve(s) are open on
all the system AMD(s).
• Slowly drain 1-2 psi (.07-.14 bar) of pressure out of one (1) of the sprinkler systems.
• Use the flow meter ball valve to relieve gas from nitrogen/air supply line to sprinkler
system AMDs allowing the nitrogen generator to turn on.
• Allow nitrogen generator to fill the sprinkler system(s) and turn-off.
• Compare sprinkler system pressures on all systems are the same as the target operating
pressure.
• If system pressures are NOT the same as the target operating pressure, repeat Step 8, as
necessary.
• If system pressures are the same as the target operating pressure, proceed to Step 12. Determine the nitrogen generator cut-in (turn-on) pressure by subtracting 5 psig (.3 bar) from the target system operating pressure determined at the beginning of this procedure.
• If subtracting 5 psig (.3 bar) from the target operating pressure results in a cut-in (turn-on)
pressure that is within 3 psig (.2 bar) of the low air alarm, subtract 3 psig (.2 bar) from the
target operating pressure.
• If subtracting 3 psig (.2 bar) from the target operating pressure results in a pressure that is
within 3 psig (.2 bar) of the low air alarm, contact Johnson Controls for direction. Program the cut-in (turn-on) pressure into the digital pressure transducer in the nitrogen generator (Use the Nitrogen Generator Pressure Adjustment Procedure in the Maintenance Section of this manual).
Step 12:
Step 13:
TFP1273
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