Applications - PENN Controls - F262AA - Flow, Liquid Level, and Air‐Volume Control - F262 Airflow Switch

F262 Series Airflow Switch Installation Guide

PENN Controls
Product name
F262 Airflow Switch
Document type
Installation Guide
Part number
Document revision
Revision date
Important: Use this F262 Series Airflow Switch only as an operating control. Where failure or malfunction of the F262 switch could lead to personal injury or property damage to the controlled equipment or other property, additional precautions must be designed into the control system. Incorporate and maintain other devices, such as supervisory or alarm systems or safety or limit controls, intended to warn of or protect against failure or malfunction of the F262 switch.
Important : Utiliser ce F262 Series Airflow Switch uniquement en tant que dispositif de régulation. Lorsqu'une défaillance ou un dysfonctionnement du F262 switch risque de provoquer des blessures ou d'endommager l'équipement contrôlé ou un autre équipement, la conception du système de contrôle doit intégrer des dispositifs de protection supplémentaires. Veiller dans ce cas à intégrer de façon permanente d'autres dispositifs, tels que des systèmes de supervision ou d'alarme, ou des dispositifs de sécurité ou de limitation, ayant une fonction d'avertissement ou de protection en cas de défaillance ou de dysfonctionnement du F262 switch.

The F262 Series Airflow Switch detects airflow or the absence of airflow only in response to the velocity of air movement within a duct. You can wire the switch to open one circuit and close a second circuit, single-pole, double-throw (SPDT), for either signaling or interlock purposes.

Airflow failure during the normal operation of air handling systems may cause overheating, coil icing, or other conditions that may be detrimental to the equipment.

Typical applications include:

  • Make-up air systems
  • Air cooling or heating processes
  • Exhaust systems

The switch has a Type 3R/IP43 enclosure with an integral mounting plate. A mounting plate gasket is supplied with each control.

The enclosed SPDT Penn switch has color-coded terminals for ease of wiring. The control is factory set at approximately the minimum flow rate. See Table 1. You must not set the control any lower than the factory setting because the control may fail to return to a no-flow condition. If you require a higher flow rate setting, turn the range adjusting screw clockwise.

Mount the F262 switch on the top, side, or bottom of a duct in a horizontal position whenever possible. If vertical duct mounting is required and the flow is downward, you must readjust the control. If the flow is upward, refer to Table 1 for minimum flow required to actuate the control.

The switch is not designed for use where it is exposed to outside weather.