Johnson Controls F61 Series, F61MB, F61KB, F61MG, F61LB Installation Instructions Manual
Installation Instructions F61
Issue Date July 30, 2002
F61 Series Standard 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.
Some models of the F61 Series Standard Flow
Switches require installation or adjustment of paddles
prior to mounting. See Installing the Flow Paddles.
Parts Included
Standard models of the F61 flow switch include an
installed three-piece flow paddle. Some models also
include a large flow paddle for large pipe sizes.
Table 1: Replacement Parts
Kit Number Description
KIT21A-600
KIT21A-601
PLT52A-600R
CVR62A-600R Replacement Cover Assembly for LB,
Stainless Steel Three-piece Paddle
(3 in., 2 in., and 1 in. Segments)
Stainless Steel 6 in. Paddle
Stainless Steel Three-piece Paddle
(3 in., 2 in., and 1 in. Segments) and
6 in. Paddle
MB, MD, and MG types
Installing the Flow Paddles
IMPORTANT: To allow the switch to detect changes
in the fluid flow, the flow paddle must not touch the
pipe or any restrictions in the pipe.
Adjust flow paddles to the size of the pipe used. If
needed, trim the large flow paddle at the arc
corresponding to pipe size (see Figure 1 and Figure 2)
and install.
Flow
Paddle
Screw
Trim flow paddles to fit
pipe diameter or remove
flow paddles that are
too large to fit pipe diameter.
Figure 1: Installing the Paddles
1 in.
Figure 2: Trimming Diagram for Large Flow Paddle
© 2002 Johnson Controls, Inc.
Part No. 24-8407-4, Rev. C www.johnsoncontrols.com
1-1/2 in.
2 in.
2-1/2 in.
4 in.3 in.
5 in.
Original
Length
6 in.
1
Dimensions
4
(102)
2
(51)
7/8
Diameter Hole for 1/2 in. Trade Size Conduit
(22)
1-1/16
Diameter Knockout Ring for 3/4 in. Trade Size Conduit
(27)
1-3/8
(35)
2-3/4
(71)
Use these
wrench flats
to tighten
the flow switch
at installation.
Paddle
Screw
Figure 3: NEMA 1 Enclosure (F61KB Types) Dimensions, in./mm
Use these
wrench flats
to tighten
the flow switch
at installation.
Paddle
Screw
3-11/16
(94)
1-1/4
4-3/4
(33)
(121)
1 in.
11-1 / 2 NP T
1-13/16
(47)
1-1/4
(33)
1 in. 11-1/2 NPT
2-11/16
(68)
1-3/4
(44)
1-1/8
(29)
A
1-1/8
On MB and MG Types
(29)
5/8
On LB Types
(15)
2-7/8
(73)
4-3/4
(121)
A
B
1/2-14 NPSM Thread
1-3/8
(35)
1-9/16
(40)
1-1/16
(27)
B
Grounding
Screw
Hole
2-3/4
(71)
Dimension by
Liquid Line Size
1-7/16
1
(37)1 (25)
(25)
2-1/2
2
(64)
(51)
3-1/2
3
(89)
(76)
4
6-5/8
(101)
(168)
5
6-5/8
(152)
(168)
Dimension by
Liquid Line Size
1-7/16
1
(37)1 (25)
(25)
1-1/8
2-1/2
2
(64)
3-1/2
(89)
6-5/8
(168)
6-5/8
(168)
(29)
1-1/8
(29)
1-1/8
(29)
1-1/8
(29)
(51)
3
(76)
4
(101)
5
(152)
BA
1-1/8
(29)
1-1/8
(29)
1-1/8
(29)
1-1/8
(29)
BA
Figure 4: NEMA 3 or NEMA 3R Enclosure (F61LB, F61MB, F61MG Types) Dimensions, in./mm
2 F61 Series Standard Flow Switches Installation Instructions
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.
Tee or Welded
Half-coupling
Mount the F61 Series Flow Switch, 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.
For 1 in. pipe installation, mount the F61 flow switch in
a standard 1 in. x 1 in. x 1 in. tee. For larger sizes of
pipe, use a reducing tee to keep the flow switch close
to the pipe and provide adequate paddle length in the
flow stream.
Example: Use a 2 in. x 2 in. x 1 in. tee for a
2 in. pipe. If a standard 2 in. x 2 in. x 2 in. tee is
used, install a face or hex bushing in the top
opening to reduce it to 1 in.
Mount the flow switch so the terminals or wire leads
are easily accessible for wiring. Screw the flow switch
in position so the flat of the paddle is at a right angle to
the flow. The arrow on the side of the case must point
in the direction of the flow.
A
Dimension must be at least
five pipe diameters from the nearest
elbow, valve, or other pipe restriction.
A
A
Figure 5: 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 6.
Flow
Flow
Switch
Water
Hammer
Arrester
Val ve
Figure 6: Water Hammer Arrester Location
Schematic
Wiring
!
WARNING: Risk of Electrical Shock.
Disconnect power supply before making electrical
connections. Failure to follow this precaution may
result in electrical shock or death.
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 3 through
Table 6, 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 5.
!
CAUTION: Risk of Equipment Damage.
Using terminal screws other than those provided will
void the warranty and may damage the switch. Use
only the terminal screws furnished.
IMPORTANT: To prevent moisture from entering
and condensate from forming inside the NEMA 3R
enclosure, do not remove the cover gasket or the
wire grommet from the conduit opening.
F61 Series Standard Flow Switches Installation Instructions 3
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