APS and Quick-Check / PowerSaver Setup Guidance – South-Tek Systems

This article provides general setup guidance for AutoPurge System (APS) installations that include Quick-Check or PowerSaver monitoring accessories on supported South-Tek N2-BLAST fire protection systems.

When these accessories are installed, the APS tuning process differs slightly from a standard APS-only installation. Proper setup is important to ensure accurate adjustment and normal operation after the manifold or monitoring connection is restored.

This article is intended as a general reference for setup and commissioning. Always verify the installed configuration and follow applicable South-Tek instructions for the specific equipment in use.

Overview

Quick-Check and PowerSaver accessories may be connected to the APS using the adapter port and 1/4" OD tubing. These accessories are used to help verify or monitor nitrogen purity within the fire protection system.

Because the connected tubing and manifold can influence the APS during adjustment, the tubing should be temporarily disconnected while the APS is being tuned.

When this guidance applies

Use this setup guidance when the APS is connected to:

A Quick-Check purity manifold
A PowerSaver manifold
Other compatible monitoring accessories connected through the APS adapter port

Before you begin

Before adjusting the APS, confirm the following:

The fire protection system is at supervisory pressure
The APS has been installed correctly
The APS ball valve is open for normal operation
The Quick-Check or PowerSaver tubing is accessible at the APS adapter connection
The correct APS model and applicable settings are being referenced

Setup procedure

Bring the fire protection system to supervisory pressure.
Verify that the APS ball valve is in the open position.
Locate the 1/4" OD tubing connected to the APS adapter.
Disconnect the tubing from the APS adapter before adjusting the APS flow.
Turn the APS flow dial fully to the closed position.
Adjust the APS flow dial to the applicable setting for the installed configuration.
Allow the float bead to stabilize at the intended setting.
Reconnect the 1/4" OD tubing after the float bead has stabilized.

What to expect after reconnecting tubing

After the tubing is reconnected, the float bead may drop slightly. This can occur due to the normal operation of the connected Quick-Check or PowerSaver manifold.

A slight change after reconnecting the tubing is typically normal as long as the APS was adjusted correctly before reconnection and the system is otherwise operating as expected.

Why the tubing is disconnected during setup

The APS should be adjusted without the connected tubing in place so the flow setting can be established correctly at the APS itself. Leaving the tubing connected during adjustment may affect the observed float position and lead to an improper setting.

Disconnecting the tubing during setup helps provide a more accurate and repeatable APS adjustment.

Final verification

After setup is complete, verify the following:

The 1/4" OD tubing has been reconnected securely
The APS flow setting was established before reconnecting the tubing
The APS ball valve remains in the proper operating position
The system is at supervisory pressure
No loose tubing or unintended purge condition is present

Common setup mistakes to avoid

Adjusting the APS with the tubing still connected
Failing to start with the APS flow dial in the closed position
Tuning the APS before the system is at supervisory pressure
Forgetting to reconnect the tubing after adjustment
Assuming a small float change after reconnection indicates a fault

When to contact support

Contact South-Tek Systems support if the APS does not appear to stabilize correctly, if the connected manifold does not behave as expected after reconnection, or if there is uncertainty about the proper APS model or target setting for the installed configuration.

Need additional support?

Phone: (910) 415-1880
Email: support@southteksystems911.zendesk.com