Features
- Two switch model
- Independent switch adjustment, no tools needed
- Two 1/2” conduit / cable entrances
- Separate isolated wiring chambers
- Non-corrosive pressure connection
- Non-Conductive Enclosure
- VdS version available
Installation
The Potter PS15 Series Supervisory Pressure Actuated Switches are designed primarily to detect an increase and/or decrease from normal system pressure in automatic fire sprinkler systems. Typical applications are: air/nitrogen supervision in Dry pipe and pre-action systems, pressure tanks, air supplies, and water supplies. The PS15 has two switches. The Low switch is factory set to activate at approximately 10 psi (0,35 bar) on a decrease in pressure. The High switch is factory set to activate at approximately 20 psi (1,4 bar) on an increase in pressure. See section heading Adjustments and Testing if other than factory set point is required.
Adjustment and Testing
The operation of the pressure supervisory switch should be tested upon completion of installation and periodically thereafter in accordance with the applicable NFPA codes and standards and/or the authority having jurisdiction (manufacturer recommends quarterly or more frequently).
The use of a Potter BVL (see product bulletin 5400799 for details) is recommended to facilitate setting and testing of the PS15 pressure switch. When a BVL (bleeder valve) is used, the pressure to the switch can be isolated and bled from the exhaust port on the BVL without affecting the supervisory pressure of the entire system
The operation point of the PS15 Pressure Switch can be adjusted to any point between 5 and 30 psi (0,35 - 2,07 bar) by turning the adjustment knob(s) clockwise to raise the actuation point and counter clockwise to lower the actuation point. In the case of the PS15-2, both switches operate independently of each other. Each switch may be independently adjusted to actuate at any point across the switch adjustment range. Initial adjustment can be made with a visual reference from the top of the adjustment knob across to the printed scale on the switch bracket. Final adjustments should be verified with a pressure gauge.
Engineer/Architect Specifications Pressure Type Waterflow Switch
Pressure type supervisory switches; shall be a Model PS15 as manufactured by Potter Electric Signal Company, St. Louis, MO., and shall be installed on the fire sprinkler system as shown and or specified herein.
Switches shall be provided with a 1/2” NPT male pressure connection to be connected into the air supply line on the system side of any shut-off valve. A Model BVL bleeder valve as supplied by Potter Electric Signal company of St. Louis, MO., or equivalent shall be connected in line with the PS15 to provide a means of testing the operation of the supervisory switch
The switch unit shall contain SPDT (Form C) switch(es). The low switch shall be factory set to activate at 10 psi (0,7 bar) on pressure decrease. The high switch shall be factory set to activate at 20 psi (1,4 bar) on a pressure increase.
Switch contacts shall be rated at 10.1 Amps at 125/250VAC and 2.0 Amps at 30VDC. The units shall have a maximum pressure rating of 300 psi (20,68 bar) and shall be adjustable from 5 to 30 psi (0,35 to 2,07 bar).
Pressure switches shall have two conduit entrances, one for each individual switch compartment to facilitate the use of dissimilar voltages for each individual switch.
The cover of the pressure switch shall be Weather/UV/Flame Resistant High Impact Composite with rain lip and shall attach with one tamper resistant screw. The pressure switch shall be suitable for indoor or outdoor service with a NEMA-4/IP66 rating.
The pressure switch shall be UL, cUL, and CSFM listed, FM approved, LPCB Approved, and NYMEA accepted.
Technical Specifications
- Conduit Entrances - Two knockouts provided for 1/2” conduit. Individual switch compartments and ground screw suitable for dissimilar voltages
- Contact Ratings - SPDT (Form C) 10.1 Amps at 125/250VAC, 2.0 Amps at 30VDC
- Cover Tamper - Cover incorporates tamper resistant fastener that requires a special key for removal. One key is supplied with each device
- Differential - Typical 1 lb. at 5 psi (,07 at 0,34 bar) 3 lbs at 30 psi (,21 at 2,1 bar)
- Dimensions - 3.78”(9,6cm)Wx3.20”(8,1cm)Dx4.22”(10,7cm)H
- Enclosure - Cover: Weather/UV/Flame Resistant High Impact Composite Base: Die Cast All parts have corrosion resistant finishes
- Environmental Limitations - NEMA 4/IP66 Rated Enclosure - indoor or outdoor when used with NEMA 4 conduit fittings. Temperature range: -40°F to 140°F (-40°C to 60°C)
- Factory Adjustment - LOW switch operates at approximately 10 psi (0,7 bar) on decreasing pressure. HIGH switch operates at approximately 20 psi (1,4 bar) on increasing pressure
- Maximum System Pressure - 300 psi (20,68 bar)
- Pressure Connection - Nylon 1/2” NPT male
- Pressure Range - 5-30 psi (0,35 - 2,07 bar)
- Service Use - NFPA 13, 13D, 13R, 72
1340415 Specifications PDF
