Field Instruments

General

The Model VSR is a vane type waterflow switch for use on wet sprinkler systems. It is UL and CUL Listed for use on steel pipe; schedules 10 through 40. See Ordering Information chart. The VSR may also be used as a sectional waterflow detector on large systems. The VSR contains two single pole, double throw, snap action switches and an adjustable, instantly recycling pneumatic retard.  The switches 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 period.

Features:

• 0-90 second field replaceable time delay retard
• Easy to read retard time delay adjustment knob
• Weatherproof and UV resistant
• Easy to read wire terminal designations
• Two SPDT (form C) contacts

Specifications

• Make : Potter
• Model: VSR-10
• Nominal Pipe Size: 10” , DN250
• Conduit Entrances: Two knockouts provided for 1/2" conduit. Individual switch compartments suitable for dissimilar voltages
• Contact  Ratings:  Two sets of SPDT (Form C) 10.0 Amps at 125/250VAC 2.0 Amps at 30VDC  Resistive 10 mAmps min. at 24VDC
• Enclosure Cover - Weather/UV/Flame Resistant High Impact Composite Base - Die-cast aluminum
• Environmental Specifications NEMA 4/IP54 Rated Enclosure suitable for indoor or outdoor use with factory installed gasket when used with appropriate conduit fitting.
• Temperature Range:  40°F - 120°F, (4.5°C - 49°C) - UL Non-corrosive sleeve factory installed in saddle.
• Flow Sensitivity Range for Signal 4-10 GPM (15-38 LPM) – UL
• Maximum Surge:18 FPS (5.5 m/s)
• Service Pressure: 300 PSI (20, 7 BAR)
• Service Use:
  • • Automatic Sprinkler: NFPA-13
    • One or two family dwelling: NFPA-13D
    • Residential occupancy up to four stories: NFPA-13R
    • National Fire Alarm Code: NFPA-72

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