Johnson Controls F61 series Installation Instructions Manual

F61 Series Sensitive Flow Switches

Installation

IMPORTANT: All F61 Series Flow Switches are
intended to control equipment under normal
operating conditions. Where failure or malfunction of
an F61 Flow Switch could lead to an abnormal
operating condition that could cause personal injury
or damage to the equipment or other property, other
devices (limit or safety controls) or systems (alarm or
supervisory) intended to warn of, or protect against,
failure or malfunction of the F61 Flow Switch must
be incorporated into and maintained as part of the
control system.
F61 Series Sensitive Flow Switches do not require
adjustment prior to mounting the flow switch. See
Mounting and Wiring for further information.

Mounting

!
CAUTION: Risk of Equipment Damage.
To avoid damaging the switch, do not tighten the
switch to the tee by grasping the switch enclosure.
Use only the wrench flats provided.
Mount the F61 Series Flow Switches using the
following guidelines:
•
Install the switch so that the cover and interior are
accessible.
•
Mount the switch so that the flow of fluid is in the
direction of the arrow on the switch casing.
•
Use a pipe union on each side of the flow switch to
allow easy removal or replacement.
•
Mount the switch so that the pipe does not extend
too far into the flow switch casing.
•
Use pipe thread sealer on male threads only.
•
Do not remove the cover gasket or the wire
grommet from the conduit opening.
Mount the flow switch so the terminals or wire leads
are easily accessible for wiring. The arrow on the side
of the case must point in the direction of the flow.
©
2002 Johnson Controls, Inc.
Part No. 24-7664-2330, Rev. C
Installation Instructions F61

Location Considerations

Mount the F61 flow switch in a horizontal pipeline or a
vertical pipeline with upward fluid flow. Do not use in a
vertical pipeline with downward flow. When mounted in
a vertical pipe with upward flow, the switch trips at a
slightly higher flow than shown in Table 2, due to the
effect of gravity on the switch mechanism.
Mount the F61 flow switch in a section of pipe where
there is a straight run of at least five pipe diameters on
each side of the flow switch from the nearest elbow,
valve, or other pipe restriction. See Figure 1.
Tee or Welded
Half-coupling
A
Dimension
five pipe diameters from the nearest
elbow, valve, or other pipe restriction.
Figure 1: Required Piping Distance
Do not subject the flow switches to water hammer.
Use a suitable water hammer arrester if a fast-closing
valve is located downstream of the flow switch. See
Figure 2.
Flow
Switch
Figure 2: Water Hammer Arrester Location
Schematic
Issue Date July 30, 2002
A
A must be at least
Flow
Water
Hammer
Arrester
Valve
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