Description
McDonnell & Miller FS4-3 is a universal, general purpose liquid flow switch, designed for starting and stopping a wide range of electrically-operated equipment (pumps, alarms, burners, etc.). Integral screw for adjusting flow sensitivity. NEMA 1 enclosure for indoor use only. Comes with (4) rigid stainless steel paddles for use with pipe sizes 1″ through 8″.
Cross-References:
- McDonnell & Miller: FS-251
- Hydrolevel: FS200
- Taco: IFS01/02/H1/H2
Features:
- Includes (4): 1″, 2″, 3″, & 6″ rigid stainless steel paddles for fitting into pipes of different sizes
- Two electrical knock-outs allow connection from both sides
- Starts or stops electrical equipment, such as pumps, alarms, motors, burners, and metering devices, when water flow is detected in a system
- Replaces common flow switches from Johnson/Penn, Taco, Watts, Hydrolevel, and other manufacturers
- Suitable for pipe sizes from 1″ to 8″
- Adjustable flow senstitivity via internal screw
- cULus listed
Technical Specifications:
- Electrical Specs: SPDT (Relay Type), NEMA 1 Enclosure
- Application: 1″ – 8″ pipe sizes
- Flow Rates: Refer to image specs for minimum and maximum rates for 1″ – 8″ pipe sizes
- Connection: 1″ NPT, Threaded
- Max Flow Velocity: 10 ft/sec
- Pilot Duty: 125 VA @ 120 or 240 VAC; 50/60 Cycles
- Switch Rating: 7.4 FLA, 44.4 LRA @ 120 VAC; 3.7 FLA, 22.2 LRA @ 240 VAC
- Max Pressure: 160 psi
- Max Water Temperature: 300°F
- Max Ambient Temperature: 120°F
Warranty:
1-year warranty from the date of installation; 2-year warranty from the date of manufacture
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