N
2
-BLAST
®
Nitrogen Generator FPS-1750, FPS-3000, and FPS-6000
South-Tek Systems
Version:
7
Revision Date: 5/24/16
Page 21 of 25
APPENDIX B: AUTO PURGE SYSTEM (APS)
Installation and Quick Start Guide
Introduction to APS:
The
AutoPurge System™
is simple to install and requires little maintenance. This device
provides Building Management with the assurance that high purity nitrogen is purging the
entire FPS piping inner walls and reaching all distant branch locations in a timely, efficient
manner. The APS is designed to distribute high purity nitrogen throughout the entire FPS,
ultimately maximizing corrosion protection.
Installation:
The APS comes standard with 1” NPT Tee with female connections for installation to
existing or new FPS piping. Install each APS on a high point within the system as far
away from the valve room as possible on a horizontal section of piping or where water will
not collect. Ensure the Tees’s 90° outlet is facing up so the main of the APS runs
horizontally with the FPS piping. Be sure that during Hydro Static Testing the Ball Valve
on the APS has been closed. See the installation drawing A03-APS-TI.
Settings:
There is a Label on one side of the housing that lists the proper setting for a variety of zone
sizes. The Label list Gallons in Zone, vs APS Flow Setting. The Flow Setting is labeled
from A-E and has three Settings in between each letter. If your zone has 500 Gallons, you
would turn the knob until the floater is at letter B plus ½. Every quarter, the wye strainer
needs to be checked for debris and cleaned.
Use:
Always close the ball valve on the APS when the system has planned maintenance or
pressure (gas / liquid) testing. Re-open after the system is placed back online. The wye
strainer should always be cleaned after water trips or system flooding.
Auto Purge Assembly
Settings Label
Flow Setting Indicator
