Field Instruments

General

The Model VS-SP is a vane type waterflow switch for use on wet sprinkler systems. These devices may be used as sectional flow indicators on large sprinkler systems and on smaller sprinkler systems such as mobile homes and residential dwellings.

The VS-SP does not have a retard to prevent false alarms due to water surges. Therefore it should NOT be used on systems with variable water pressure supplies except in the case of elevator recall.

Features:

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

Specifications

• Make : Potter
• Model: VS-SP
• Service Pressure:  Up to 250 PSI (17,2 BAR)
• Minimum Flow Rate for Alarm: 10 GPM (38 LPM)
• Maximum Surge: 18 FPS (5,5 m/s)
• Enclosure:  Die-cast, red enamel fi nish  Cover held in place with tamper resistant screws
• Contacts: One set of SPDT (Form C), standard Second set optional, see below:   15 Amps at 125/250VAC   0.5 Amps at 125VDC   0.25 Amps at 250VDC   2.5 Amps at 30 VDC resistive
• Conduit Entrance:  One opening for 1/2" conduit
• Usage:  Listed plastic, copper and schedule 40 iron pipe   For pipe sizes - 1" (25mm), 1-1/4" (32mm), 1-1/2" (38mm), and  2" (50mm) Note: 12 paddles are furnished with each unit, one for each pipe size of threaded and sweat TEE, one for 1" CPVC, one for 1" CPVC (Central), one for 1" Nibco threaded tee, and one for 1-1/2" threaded (Japan).
• Environmental Specifications:    
• Suitable for indoor or outdoor use with factory  installed   gasket and die-cast housing.
• NEMA 4/IP55 rated enclosure - use with appropriate conduit fitting.
• Temperature range:  40°F to 120°F  (4,5°C to 49°C)
• 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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