Potter VSR-C 2", 2 1/2", 3", 4" waterflow alarm switch Instruction Manual

The VSR-C waterflow alarm switch is a vane type waterflow switch for use on wet sprinkler systems of Type K, L, and M copper pipes. It can be used as a sectional waterflow detector on large systems and contains two single-pole, double-throw, snap-action switches, each of which can operate a separate alarm circuit. This switch is compatible with a range of sprinkler systems and is designed for ease of installation and maintenance.

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Potter VSR-C Waterflow Alarm Switch with Retard for Copper Pipe - Instruction Manual | Manualzz

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Key features

  • Vane type waterflow switch
  • UL Listed for Type K, L, and M copper pipe
  • Two SPDT switches
  • Adjustable, instantly recycling pneumatic retard
  • Optional cover tamper switch
  • Field replaceable retard/switch assembly
  • NEMA 4/IP54 rated enclosure
  • Suitable for indoor or outdoor use
  • Temperature range: 40°F - 120°F

Frequently asked questions

The VSR-C is UL Listed for use on Type K, L, and M copper pipe, sizes 2" thru 4" (50mm - 100mm).

The flow sensitivity range for the VSR-C is 4-10 GPM (15-38 LPM).

The delay can be adjusted by rotating the retard adjustment knob from 0 to the max setting (60-90 seconds). The time delay should be set at the minimum required to prevent false alarms.

The frequency of inspection and testing for the VSR-C and its associated protective monitoring system should be in accordance with applicable NFPA Codes and Standards and/or the authority having jurisdiction (manufacturer recommends quarterly or more frequently).

To prevent accidental water damage, all control valves should be shut tight and the system completely drained before waterflow detectors are removed or replaced. Then, turn off electrical power to the detector, disconnect wiring, loosen nuts and remove U-bolts, gently lift the saddle far enough to get your fingers under it, roll the vane so it will fit through the hole while continuing to lift the waterflow detector saddle, and lift the detector clear of the pipe.
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