Potter VSR-2 Manual

instructions carefully before beginning installation. A copy of this document is required by NFPA 72 to be maintained on site.

General Information The Model VSR is a vane type waterflow switch for use on wet sprinkler systems. It is UL Listed for use on a steel pipe; schedules 5 through 40, sizes 2" - 6" and is UL Listed and FM Approved for use on steel pipe; schedules 10 through 40, sizes 2" thru 8" (50 mm thru 200 mm). LPC approved sizes are 2" thru 8" (50 mm thru 200 mm). 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.

Potter Electric Signal Company, LLC • St. Louis, MO • Phone: 866-956-1211/Canada 888-882-1833 • www.pottersignal.com

PRINTED IN USA Part Number MFG. #5401146 - REV M VANE TYPE WATERFLOW ALARM SWITCH WITH RETARD UL, CUL and CSFM Listed, FM Approved, LPCB Approved, For CE Marked (EN12259-5) / VdS Approved model use VSR-EU Service Pressure: 450 PSI (31 BAR) - UL Flow Sensitivity Range for Signal: 4-10 GPM (15-38 LPM) - UL Maximum Surge: 18 FPS (5.5 m/s) 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 Conduit Entrances: Two knockouts provided for 1/2" conduit. Individual switch compartments suitable for dissimilar voltages. Environmental Specifications: • NEMA 4/IP54 Rated Enclosure suitable for indoor or outdoor use with factory installed gasket and die-cast housing 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. Service Use: Automatic Sprinkler One or two family dwelling Residential occupancy up to four stories National Fire Alarm Code • Installation must be performed by qualified personnel and in accordance with all national and local codes and ordinances. • Shock hazard. Disconnect power source before servicing. Serious injury or death could result. • Risk of explosion. Not for use in hazardous locations. Serious injury or death could result. Waterflow switches that are monitoring wet pipe sprinkler systems shall not be used as the sole initiating device to discharge AFFF, deluge, or chemical suppression systems. Waterflow switches used for this application may result in unintended discharges caused by surges, trapped air, or short retard times. The VSR switches and retard device are enclosed in a general purpose, die-cast housing. The cover is held in place with two tamper resistant screws which require a special key for removal. A field installable cover tamper switch is available as an option which may be used to indicate unauthorized removal of the cover. See bulletin number 5401103 for installation instructions of this switch. PAGE 1 OF 4

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Summary of Contents for Potter VSR-2

Page 1 Potter Electric Signal Company, LLC • St. Louis, MO • Phone: 866-956-1211/Canada 888-882-1833 • www.pottersignal.com PRINTED IN USA MFG. #5401146 - REV M PAGE 1 OF 4 11/15.
Page 2 60.3 VSR-2 DN50 2.375 .065 1.651 0.109 2.77 0.154 3.91 0.142 0.091 1.25 + .125/- VSR-2 1/2 2.875 73.0 .084 2.134 0.120 3.05 0.203 5.16 33.0 ± 2.0 .062 VSR-2 1/2 DN65 3.000 76.1 0.142 0.102.
Page 3 VANE TYPE WATERFLOW ALARM SWITCH WITH RETARD Fig. 2 Fig. 3 Fig. 4 Switch Terminal Connections Clamping To remove knockouts: Place screwdriver at Plate Terminal Break out thin section of cover when inside edge of knockouts, not in the center. wiring both switches from one conduit entrance. An uninsulated section of a single conductor should not be looped around the terminal and serve as two separate connections.
Page 4 VANE TYPE WATERFLOW ALARM SWITCH WITH RETARD Maintenance Inspect detectors monthly. If leaks are found, replace the detector. The VSR waterflow switch should provide years of trouble-free service. The retard and switch assembly are easily field replaceable. In the unlikely event that either component does not perform properly, please order replacement retard switch assembly stock #1029030 (see Fig. 8). There is no maintenance required, only periodic testing and inspection. Retard/Switch Assembly Replacement (See Fig. 8) The Retard/Switch Assembly is field-replaceable without draining the system or removing the waterflow switch from the pipe Make sure the fire alarm zone or circuit connected to the waterflow switch is bypassed or otherwise taken out of service. Disconnect the power source for local bell (if applicable). Identify and remove all wires from the waterflow switch.
Page 5 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: AMSECO VSR-4.