Potter Amseco VSR-AT-2 Auto-Test Waterflow Alarm Switch with Electronic Retard, 2" Pipe Size, Sprinkler Threaded Flow Switch With Plastic Threaded Union

The Potter Amseco VSR-AT-2 is an electronic vane type waterflow switch for use on wet sprinkler systems. It is UL Listed and FM Approved for use on steel pipe schedules 10 thru 40 size 2.

The VSR-AT-2 may also be used as a sectional waterflow detector on large systems. The VSR-AT-2 has two sets of alarm contacts and an adjustable instantly recycling electronic retard. The alarm contacts are actuated when a flow of 10 GPM (38 LPM) or more occurs downstream of the device. The flow condition must exist for a period of time necessary to overcome the selected retard time.

The VSR-AT-2 may be remotely tested without flowing water by using the optional auto test Control model ATC-1or ATC-4 or the use of addressable relays and monitor modules as part of a listed addressable fire alarm panel.

When the auto test feature is initiated, the VSR-AT-2 performs a self test to ensure compliance with UL requirements regarding waterflow detection and retard time. In addition, the auto test feature ensures the integrity of the paddle/trip stem assembly. A successful completion of the auto test will activate both sets of normally open contacts on the flow switch. If the auto test detects a problem with the trip stem/paddle assembly or if there is no water in the pipe, neither normally open contact will operate and the flow switch will indicate a trouble condition at the test switch and transmit a trouble signal to the fire alarm panel.

Enclosure
A general-purpose, die-cast enclosure houses the VSR switches and the retard device. Two tamper-resistant screws that need a unique key to remove hold the cover in place. As an extra, there is a field-installable cover tamper switch that can be used to signal unlawful cover removal. For this switch's installation instructions, refer to bulletin number 5401103.

UPC: 785192021575
Also known as: PL-VSRAT2, VSRAT2

Technical Specifications: Contact Ratings: 2.5 AMP @ 125/250 VAC & 30 VDC Maximum Surge: 18 FPS (5.5 m/s) Flow Sensitivity Range for Signal: 4-10 GPM (15-38 LPM) - UL Service Pressure: 450 PSI (31 BAR) - UL Typical Current Draw: Standby 20 mA, Alarm 65 mA, Autotest 120 mA Power Requirements: 24 VDC From Listed or Approved Source With Battery Backup Conduit Entrances: Two knockouts provided for 1/2" conduit

For more information about the Potter / Amseco VSR-AT 2, please contact us.