Johnson Controls F240EA Installation Guide

F240EA Pneumatic Liquid Flow Switch

Installation Instructions

Part No. 24-7664-3132, Rev. A

Issued October 15, 2015

Refer to the QuickLIT website for the most up-to-date version of this document.

Applications

IMPORTANT: Do not use F240EA Pneumatic

Liquid Flow Switches with fluids that are
incompatible with the wetted materials (forged
normal brass, free machining bronze, and Viton®)
and which are classed as a hazardous material. Use
in this condition may cause malfunction or improper
operation.

IMPORTANT: Do not use F240EA Pneumatic
Liquid Flow Switch where the fluid in the pipes drops
below the fluid’s freezing point, causing an internal
freeze-up.

IMPORTANT: Use thi s F240EA Pneumatic Liquid
Flow Switch only as an operating control. Where
failure or malfunction of the flow 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
flow switch.

IMPORTANT: Utiliser ce F240EA Pneumatic Liquid
Flow Switch uniquement en tant que dispositif de
régulation. Lorsqu'une défaillance ou un
dysfonctionnement du flow 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 flow switch.

The F240EA switch uses a variety of paddle sizes to
respond to liquid flow rates in applications with pipe
sizes greater than 1-inch trade size. The paddle has
three segments. You can remove (or trim) the paddle
segments for pipe sizes under 3 inches. A 6 in. paddle
that can be trimmed for 4 in. and 5 in. pipe is available.

The F240EA Pneumatic Liquid Flow Switch acts as an
automatic operating control in air conditioning, heating
and cooling water systems and in processing work.

Typical applications include:

• Flow detection switch to start the refrigeration
compressor on a liquid chiller system when flow
has been established.

• Signal or alarm switch to indicate when the pump
on a condenser cooling water system shuts down.

• Proving the flow of water before an electric
immersion heater is turned on.

Installation

The F240EA Pneumatic Liquid Flow Switch is
packaged with 1 in., 2 in., and 3 in. stainless steel flow
paddles along with a paddle screw and lock washer.
See Table 2 for replacement parts.

IMPORTANT: The flow paddle must not touch the
pipe or any restrictions in the pipe. If the flow paddle
touches the pipe (or restrictions in the pipe), the
switch may not be able to properly detect changes in
fluid flow.

Adjust the flow paddles to the size of the pipe used.
Install the large flow paddle, if needed. Trim the flow
paddle at the arc corresponding to the pipe size. See
Figure 1, Figure 2, Figure 3, and Table 1.

The F240EA Pneumatic Liquid Flow Switch detects the
increase or decrease of liquid flow in a pipe. The
F240EA switch responds to liquid flow in a pipe that
carries water, ethylene glycol, or other nonhazardous
fluids.

F240EA Pneumatic Liquid Flow Switch Installation Instructions

1

Figure 1: Installing the Flow Paddles

FIG:in stl_fl w_pddl

Figure 2: Trimming the Flow Paddles

2 in. [

3 in. [
4 in. [
5 in. [
6 in.

37 mm]
43 mm]
54 mm]
67 mm]

83 mm]
103 mm]
134 mm]

b

1 in. padd le

Figure 3: Trimming Diagram for the Large Flow

Paddle

2 in. pipe

1 in. pipe

Original Length

FIG:pdd l_tmpl t

Note: Allow a minimum clearance of 3/16 in. (5 mm)
between the end of the flow paddle and the pipe wall.

Table 1: Trimming the Flow Paddles (Part 2 of 2)

Paddle Size Use or Trim This Paddle to Fit

5 in. 6 in.
6 in. 6 in.

1-1/2 in. pipe

FIG:trm_f lw_pddl_ F240EA

1 in. [
1-1/4 in. [
1-1/2 in. [

2-1/2 in. [

b = 25 mm fo r th e
b = 29 mm fo r th e paddle 2, 3, or 6 in .

29 mm]

[162 mm]

Table 1: Trimming the Flow Paddles (Part 1 of 2)

Paddle Size Use or Trim This Paddle to Fit

1 in. 1 in.
1-1/4 in. 2 in.
1-1/2 in. 2 in.
2 in. 2 in.
2-1/2 in. 3 in.
3 in. 3 in.
4 in. 6 in.

2-1/2 in. pipe

3 in. pipe

4 in. pipe

5 in. pipe

6 in. pipe

F240EA Pneumatic Liquid Flow Switch Installation Instructions

2

Dimensions

Figure 4: Dimensions for F240EA Standard Flow Switch, in. [mm]

FIG:dmnsns_F240EA

[54]

[66]

1-3/8

[35]

2-3/4

[70]

1/2 [13]

Typical

Thread

Engagement

30mm Hex

3-1/2

[89]

4-1/2
[114]

5-11/16

[144]

1-1/8

[28]

4

[102]

2

[51]

4-9/16

[116]

Barbed connector for

1/4 [6] O.D. x

3/16 [4] I.D.

tubing

1-11 1/2 NPT

3/4

[18]

2-1/8

2-9/16

Accessories

Table 2: Replacement Paddle Parts

Product Code
Number

KIT21A-600 Stainless steel 3-piece paddle (3 in., 2 in., and 1 in. segments)
KIT21A-601 Stainless steel 6 in. paddle
KIT21A-602 Stainless steel 3-piece paddle (3 in., 2 in., and 1 in. segments) and Stainless steel 6 in. paddle

Description

F240EA Pneumatic Liquid Flow Switch Installation Instructions

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