Installation and Adjustment
1. Securely mount the NS-Pak enclosure to the wall using the
keyhole slots.
2. Confirm that all valves are closed.
3. To prevent damage to equipment and personal injury, con
firm that the nitrogen cylinder is securely mounted in accor-
dance with appropriate local, state, or federal standards.
4. Before connecting the Tank Pressure Regulator, inspect
both the cylinder outlet and the Tank Pressure Regulator
inlet for damaged threads or foreign matter. Remove foreign
matter with a clean cloth, and replace cylinders or pressure
regulators having damaged threads.
5. Momentarily open the cylinder control valve a small amount
to dislodge any foreign matter from inside the valve and
prepare it for mounting the Tank Pressure Regulator.
6. Apply thread sealant to male threads and tighten the Tank
Pressure Regulator to the cylinder control valve securely
with a wrench. Do not over tighten.
7. Using the the stainless steel hose provided, connect the
Tank Pressure regulator to the inlet of the NS-Pak assembly.
8. Using the stainless steel hose provided, connect the NS-
Pak outlet to the open port provided for pneumatic supply
to the sprinkler system (see note 1).
9. Before applying pressure to the system, turn the adjustment
screw on the System Pressure Regulator within the NS-Pak
fully counterclockwise.
10. Open the cylinder control valve and supply inlet valve in
the NS-Pak.
11. Open the Bypass Valve and the NS-Pak Outlet Valve to
allow nitrogen to flow into the system piping.
12. When the system pressure rises to within 2 psi of required
system pressure, fully close the Bypass Valve.
13. Slowly turn the adjustment screw of the System Pressure
Regulator clockwise to increase pressure to the level
required by the system. Tighten the lock-nut on the System
Pressure Regulator.
14. If necessary adjust the pressure setting of the System
Pressure Switch based upon the system pressure
(see note 2).
15. Use a soap solution at all joints to verify leak-tight connec-
tions.
Notes:
1. The check valve provided with the stainless steel hose
must be installed in the horizontal position.
2. The System Pressure Switch in the NS-Pak replaces the
low-pressure switch normally located at the dry pipe or
deluge valve.
Model NS-Pak Components
Figure 4
Bulletin 254
May 2019
Page 5 of 7
www.reliablesprinkler.com
Pressure Regulator
P/N 6999991570
