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Make all wiring connections using copper conductors only.
Use the terminal screw furnished. Substitution of other screws will void the
warranty and agency approvals.
Adjustments
CAUTION: Improper operation hazard
The switch is factory set at approximately the minimum flow rate (see
table 1 Typical Flow Rate). Do not set lower than the factory setting as
this may result in the switch failing to return to a "no flow" position.
CAUTION: Equipment damage hazard
The paint sealed setpoint shall not be adjusted randomly. Any attempt
to adjust may result in failure in control and adjustment, and also it's
out of scope of warranty.
To adjust the setting of the flow switch:
Pipe Size(in.)
Flow Increase
Min.
R to B Closes
Adj.
Flow Decrease
R to Y Closes
Flow Increase
Max.
R to B Closes
Adj.
Flow Decrease
R to Y Closes
a
．
V alues for 2 in. paddle trimmed to fit pipe.
b
．
V alues for 3 in. paddle trimmed to fit pipe.
c
．
F low rates for these sizes are calculated installed 1 in., 2 in., 3 in. paddle. Bracket valves are for a switch with a 6 in. paddle, for 4 in. and 5 in. line pipe, the 6 in. paddle is
trimmed to a 4 in. and 5 in. length. For 8 in. line pipe, values are for install 1 in., 2 in., 3 in. and 6 in. paddle.
Symptom/Problem
Liquid from the tank is leaking into enclosure due to bellows failure.
Switch will not activate due to debris caught within the switch
mechanism
Control switch action is reversed
Control does not switch
Control will switch on flow but won't return when there is no flow
Control does not switch on flow increase
2 FS80-C Flow Switch Installation Instruction
Table 1 Typical Flow Rate- m
a
a
1
1-1/4
1-1/2
0.95
1.32
1.70
0.57
0.84
1.14
2.0
3.02
4.36
1.93
2.84
4.09
Table 2 Troubleshooting
Replace unit.
Clear any debris within the switch mechanism. Test the operation of switch several times for proper
operation
Ensure connections follow wiring diagrams
Check connections
On vertical pipe, ensure that direction of flow is up. The arrow on switch must point in direction of
flow (up).
Check for cracked/broken paddle. Replace if necessary
Figure 5 Trimming Template for the Extra Paddle
Figure 6 Dimensions
1.
Remove the FS80-C cover.
2.
For higher flow rates, turn the adjusting screw clockwise. To lower the flow
rates after it has been raised from the factory setting, turn the adjusting
screw counterclockwise. See Figure 1.
3.
Check to see that the flow switch is not set lower than factory setting by
depressing the main lever numerous times. If the lever fails to "click" upon
return at any time, turn the adjusting screw clockwise until the lever clicks
upon return every time. See Figure 7.
Checkout Procedure
The circuit between the red and blue leads (terminals) will be closed when
sufficient liquid flows through the pipe to trip the flow switch.
Before leaving the installation, observe at least three complete operating
cycles to be sure that the Flow Switch and the system to which it is connected are
functioning correctly.
3
/h Required to Actuate the Switch
b
2
2-1/2
3
3.11
4.09
6.24
2.16
2.84
4.32
6.59
7.84
12.0
6.13
7.3
11.4
c
c
4
5
6
14.8
28.4
43.2
(8.4)
(12.9)
(16.8)
11.4
22.9
35.9
(6.1)
(9.3)
(12.3)
29.1
55.6
85.2
(18.4)
(26.8)
(32.7)
27.7
53.4
81.8
(17.3)
(25.2)
(30.7)
Solution
Figure 7 Minimum Adjustment
c
c
8
85.2
(46.6)
72.7
(38.6)
173
(94.3)
166
(90.8)
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