Page 17 - NG-1 100, NG-1 250, NG-1 500 - Wall-Mounted Nitrogen Generator System Installation Manual

Step 3b: Plumb the Nitrogen/Air Supply Line – With Separate Air Compressor (Figure 3b)
A separate air compressor can be used to meet the NFPA 13 30-minute fill requirement or as a back up to the nitrogen generator. In this application, the nitrogen/air discharge plumbing from the TYCO Nitrogen Generator and the separate air compressor are connected to the dry or preaction valve trim with isolation valves in each supply line using a minimum 1⁄2” black steel, galvanized steel, or copper lines. The size of the nitrogen/air supply line must be based on both the length of pipe between the nitrogen generator and fire sprinkler systems and the total volume of fire sprinkler systems being supplied.
NOTE:
The TYCO Nitrogen Generator requires an in-line Air Maintenance Device (AMD) such as the TYCO AMD-1 which is equipped with an on-board field adjustable pressure regulator for each sprinkler system being served.
When an NG-1 100 or NG-1 250 nitrogen generator is connected to a single dry pipe or preaction system, the nitrogen generator can be installed without an AMD. Johnson Controls recommends a ball valve and a check valve be installed in the nitrogen/air supply line.
Nitrogen
Isolation Ball Valve
Nitrogen Supply Line
Air Supply Line
Isolation Ball
Air Compressor
Dry Pipe/Pre-Action System Control Valve
Step 3c:
Figure 3b
Plumb the Nitrogen/Air Supply Line – With House/Plant Air Supply (Figure 3c)
A separate house/plant air supply can be used as a back up to the nitrogen generator. In this application, the nitrogen/air discharge plumbing from the TYCO Nitrogen Generator and the separate hose/plant air supply are connected to the dry or preaction valve trim with isolation ball valves in each supply line using a minimum 1⁄2” black steel, galvanized steel, or copper lines. The size of the nitrogen/air supply line must be based on both the length of pipe between the nitrogen generator and fire sprinkler systems and the total volume of fire sprinkler systems being supplied.
NOTE:
The TYCO Nitrogen Generator requires an in-line Air Maintenance Device (AMD) such as the TYCO AMD-1 which is equipped with an on-board field adjustable pressure regulator for each sprinkler system being served.
When an NG-1 100 or NG-1 250 nitrogen generator is connected to a single dry pipe or preaction system, the nitrogen generator can be installed without an AMD. Johnson Controls recommends a ball valve and a check valve be installed in the nitrogen/air supply line.
TFP1273 Page 16 of 80
Air/Nitrogen Supply Line