Product Description

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.

Note: The Model VS-SP has one SPDT switch. An optional second switch is available if required. For example, one switch would connect to an annunciator panel, and the optional switch could be used to operate a local bell. Order Switch Kit No. 0090013

Features & Specifications

• UL, cUL Listed and CE Marked waterflow alarm switches shall be furnished and installed at each sprinkler system branch line connection to the wet pipe main where indicated on the drawings, and as required by NFPA Standards.
• Mounting shall be by means of a 1 inch TEE fitting installed in the branch line. Vanes shall be field installed on the switch from a selection supplied with the switch and fit pipe sizes 1 inch through 2 inches.
• Waterflow switches shall be capable of operation in system pressures up to 250 PSI, maximum surges of up to 18 FPS and alarm activation at 10 GPM. Switch configuration shall consist of one single pole double throw (S.P.D.T.) Form C set of contacts rated at 15A, 125 VAC and 2.5A, 30 VDC. It shall be possible to field install an optional second set of switch contacts. Flowswitch enclosure shall meet NEMA 4 rating and shall be held captive by tamper resistant screws or supervised for removal by a cover tamper switch. Connection to piping shall be by means of 1” NPT or 1” BSPT threaded brass bushing.
• Waterflow Alarm Vane Switch shall be Model VS-SP for NPT threads or VS-SPB for BSPT threads manufactured by Potter Electric Signal Company LLC.
• UL, cUL, CSFM and NYBSA Listed, CE Marked
• 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 finish
• 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