Field Instruments

General

The Model WFSR-F is a pressure operated switch with an adjustable, instantly recycling pneumatic retard to prevent false alarms due to water pressure variation. The WFSR-F is connected into the alarm port of a wet sprinkler system alarm check valve. Cover incorporates tamper resistant fasteners that require a special key for removal. One key is supplied with each device. For optional cover tamper switch kit, order Stock No. 0090018.

Features:

• Assembled in USA
• Easy to read retard time delay adjustment knob
• 0-90 second field replaceable time delay retard
• Mounting secured with integral 1/2" male NPT fitting
• Two SPDT (form C) contacts
• Weatherproof
• Easy to read wire terminal designations

Specifications

• Make : Potter
• Model: WFSR-F
• Pressure Connection:1/2" Male NPT
• Conduit Entrances: Two knockouts provided for 1/2" conduit.
• Contact  Ratings:  Two Sets of SPDT (Form C) 15.0 Amps at 125/250VAC 2.0 Amps at 30VDC Resistive
• 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)
• Max. Pressure: 175 PSI (12,1 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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