1111100 Potter VS-SP Special Application Waterflow Switch without Retard

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.

Installation

These devices may be mounted in horizontal or vertical pipe. On horizontal pipe they should be installed on the top side of the pipe where they will be accessible. The units should not be installed within 6" (15cm) of a valve, drain or fitting which changes the direction of the water flow. Select the proper paddle for the pipe size and type of TEE used. See Fig. 1 for instructions on how to change the paddle. The unit has a 1" NPT bushing for threading into a non- corrosive TEE. See Fig. 2 for proper TEE size, type and installation. Use no more than three wraps of teflon tape as thread lubricant. Screw the device into the TEE fitting as shown in Fig. 2. Care must be taken to properly orient the device for the direction of waterflow.

The vane must not rub the inside of the TEE or bind in any way. The stem should move freely when operated by hand

Testing

Check the operation of the unit by opening the inspector’s test valve at the end of the sprinkler line, or the drain and test connection if a test valve is not provided.

If there are no provisions for testing the operation of the flow detection device on the system, application of the VS–SP is not recommended or advisable.

Specifications

• 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
• Optional: - Extra Contacts Switch Kit, Stock No. 0090013 (Extra Contacts Switch is Field Installed) Cover Tamper Switch Kit, Stock No. 5420220

1111100 Specifications PDF