This article provides general setup and operation guidance for the Quick-Check Purity Sampling Manifold used with supported South-Tek N2-BLAST fire protection systems.
The Quick-Check Purity Sampling Manifold is used to verify nitrogen purity at a sampling point within the fire protection system. It helps service personnel, inspectors, and building staff confirm that the system is being supervised with nitrogen at the intended purity level.
This article is intended as a general guide. Installation details may vary by system configuration.
What the Quick-Check Purity Sampling Manifold does
The Quick-Check Purity Sampling Manifold is designed to sample gas from the fire protection system and display the measured purity condition at the manifold.
This accessory is typically used during startup, inspection, troubleshooting, or routine service when nitrogen purity needs to be checked at a specific location.
When this accessory is used
The Quick-Check Purity Sampling Manifold is commonly used when a project requires a dedicated purity verification point but does not require the ongoing automated zone monitoring features provided by a PowerSaver manifold.
Not every N2-BLAST fire protection system includes a Quick-Check accessory. Installed equipment will vary based on the project design and customer requirements.
Before startup
Before powering or using the Quick-Check Purity Sampling Manifold, confirm the following:
- The unit has been mounted in a ventilated, non-hazardous location
- Power connection matches the unit requirements
- The touchscreen is in the OFF mode before initial setup
- All APS valves and flow controls connected to the Quick-Check are closed before initial pressurization
- There is no water that will enter the APS when the fire protection system is pressurized
- Any leaks in the fire protection system have been identified and corrected
- APS setup and tuning have been completed before final operation
Initial setup
- Mount the Quick-Check Purity Sampling Manifold in the intended location.
- Verify the power connection and confirm the unit is in the OFF mode on the Home screen.
- Close all APS valves and flow controls that will connect to the Quick-Check.
- Pressurize the fire protection system with nitrogen and correct any leaks before proceeding.
- Set up each APS according to the applicable APS tuning instructions.
- Run the 1/4" OD poly tubing from the APS to the monitored zone connection on the Quick-Check.
- Set the system date and time through Menu > Zone Setup > Set Time and Date.
- Optionally rename the monitored zone in Zone Setup for a more descriptive label.
During startup, check all pipe fittings and tubing for leaks. If repairs are needed, shut off the air supply valve and depressurize the system before making corrections.
Initial System Purge (startup mode)
When a fire protection system is first filled with nitrogen, the nitrogen mixes with the atmospheric air already present in the piping. To help the system reach the intended purity level without nuisance alarming, the Quick-Check Purity Sampling Manifold includes an Initial System Purge feature.
Initial System Purge allows the system to purge for a set period without generating an alarm while the oxygen content is being driven down to the acceptable range.
To enable Initial System Purge:
- Open Menu.
- Press Zone Setup.
- Press Start-Up Settings.
- Set the number of purge days if needed.
- Turn the selector switch on next to Initial System Purge (Days).
The factory default is 40 days. This feature will automatically turn off once the days remaining reach 0, but it can also be turned off manually at any time.
Normal startup
After the initial setup has been completed and the system is ready for operation:
- Open the APS ball valve and confirm APS tuning is correct.
- Toggle the ON/OFF button on the Home screen to the ON position.
If the generator or any part of the system has been opened to atmosphere or water, the system should be purged again to return to the intended purity range.
Sampling and zone setup
The Quick-Check samples the monitored zone at the same time every day. This schedule can be adjusted through Menu > Zone Setup > Sampling Settings.
On the Sampling Settings screen, you can adjust:
- Time of day for sampling
- Sample duration
- Sample frequency
- Purge duration after sampling
Factory default settings are daily sampling for 3 minutes, with purge allowed for 24 hours when the zone is out of specification.
Changing the date or time affects when the Quick-Check begins sampling and also affects filter replacement scheduling.
General operation
During normal use, the Quick-Check Purity Sampling Manifold draws a sample from the connected fire protection system so the nitrogen purity condition can be reviewed.
This allows personnel to verify whether the system is maintaining the intended purity level at the monitored location.
Because this is a sampling accessory, it is generally used as a verification tool rather than as a full-time multi-zone management device.
Reading the unit status
The Quick-Check Home screen provides a visual indication of current zone condition.
- Zone purity status indicates whether the monitored zone is within the intended purity limits
- Zone flow status indicates whether flow from the APS is being detected properly
- Current mode shows whether the unit is purging or sampling
- Alarm status shows whether an alarm is active
If an alarm is active, additional alarm information can be viewed through the Menu.
How it relates to APS
In many fire protection configurations, the Quick-Check Purity Sampling Manifold is connected through the AutoPurge System (APS).
If APS adjustment is required on a system that includes a Quick-Check connection, follow the applicable APS setup guidance to avoid affecting the APS flow setting during adjustment.
When tuning APS for use with the Quick-Check Purity Sampling Manifold, mark each 1/4" APS purge line, remove the tubing from the Quick-Check, set the APS flow, and reconnect the tubing to the appropriate zone port after the float bead has stabilized.
Basic maintenance considerations
The Quick-Check Purity Sampling Manifold should be kept clean and dry, and any required service should be performed using approved replacement components.
Routine service may include filter replacement, inspection of tubing and fittings, and general review of electrical and pneumatic connections.
The unit also includes maintenance features that can assist with troubleshooting:
- Maintenance Test runs a short sampling check
- Valve Manual Test Mode can be used for troubleshooting, pressure testing, or alarm testing
Shutdown
For normal shutdown, toggle the ON/OFF button on the Home screen to OFF.
The Quick-Check may remain pressurized after shutdown. Before performing maintenance or opening any piping, depressurize the system as required.
When to contact support
Contact South-Tek Systems support if the Quick-Check Purity Sampling Manifold is not powering up, is not responding normally, is displaying unexpected readings, is not reaching the intended purity range after startup, or if there is uncertainty about setup, startup mode, or operation.
Related articles
- Quick-Check Accessories Overview for N2-BLAST Systems
- Quick-Check PowerSaver Manifold Setup and Operation
- Quick-Check PowerSaver Calibration, Alarms, and Maintenance
- APS and Quick-Check / PowerSaver Setup Guidance
- AutoPurge System (APS) Field Tuning Instructions
Need additional support?
- Phone: (910) 415-1880
- Email: support@southteksystems911.zendesk.com