Johnson Controls f261mah-v01c Flow Switch Nema 4

Product Description

The JOHNSON CONTROLS f261mah-v01c is a liquid flow switch designed for use in hydronic, chilled water, and related piping systems where flow detection is required for equipment protection or control logic. The unit features a NEMA 4 enclosure, providing a weatherproof and splash-resistant housing suitable for both indoor and outdoor installations. Stainless steel paddles are included in multiple sizes, allowing the technician to select the correct paddle for the pipe diameter at hand. This switch is typically installed by licensed plumbers or HVAC mechanical contractors as part of a chiller, boiler, or air handler loop.

The f261mah-v01c is suited for residential and light commercial hydronic systems as well as commercial HVAC applications where flow confirmation is required before enabling mechanical equipment. The included stainless steel paddles cover 1 inch, 2 inch, 3 inch, and 6 inch pipe sizes, making this a versatile solution across a range of pipe diameters without requiring a separate paddle kit. It is commonly installed in chilled water or condenser water loops, heating hot water systems, and process cooling circuits.

Key Features

• NEMA 4 enclosure rated for weatherproof and splash-resistant service
• Includes stainless steel paddles in four sizes: 1 inch, 2 inch, 3 inch, and 6 inch
• Stainless steel paddle material resists corrosion in wet piping environments
• Paddle-style flow detection provides reliable go/no-go flow confirmation
• Suitable for integration into control circuits requiring flow interlock logic

Compatibility

Designed as an OEM-style replacement or new-installation flow switch for hydronic and chilled water piping systems requiring paddle-type flow detection with a NEMA 4 enclosure.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber in accordance with applicable local mechanical codes. Shut off and depressurize the piping system and isolate the section of pipe before cutting in the tee fitting required to mount the flow switch. Select the appropriate stainless steel paddle for the pipe diameter being served before final assembly. Verify that the flow switch wiring is connected to a de-energized low-voltage control circuit and follow all NEC requirements for control wiring.

Technical Specifications

• Enclosure Rating: NEMA 4
• Paddle Material: Stainless Steel
• Included Paddle Sizes: 1 inch, 2 inch, 3 inch, 6 inch

Standard Information

• Brand: JOHNSON CONTROLS
• Manufacturer Part Number: f261mah-v01c