Flow Switch Plumbing Installation - Franklin Electric Fhoton Drive Guide D'installation

Flow Switch Plumbing Installation

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WARNING
!
Hazardous Pressure Present: Pressure at the flow switch must be limited according to the water temperature that the flow
switch will see in service. Note that this includes the temperature that the water could reach due to heating by the surrounding
environment. Pressure at the flow switch must be limited according to the following table.
Maximum Water Temperature (°C)
NOTE: Pressure at the flow switch can be reduced by eliminating plumbing restrictions including reductions in pipe diameter
downstream of the flow switch.
On the F21 paddle style flow switch, the paddle must be trimmed to allow it to fit into the plumbing. The paddle should be trimmed
so that it is as long as possible, but not closer than 4 mm (.160"), to the pipe walls when installed. A longer paddle length will increase
flow switch sensitivity and therefore water delivery at low power conditions. Additional installation instructions including mounting
orientation, paddle trimming, other plumbing requirements, etc. are included with the flow switch. Follow the installation instructions
included with the packaging of the flow switch for installation and maintenance information.
16
Flow Switch Pressure Rating vs. Water Temperature
20
25
30
35
40
45
50
55
60
Table 2: Flow Switch Pressure
Gauge Pressure (bar)
18
15.75
13.5
11.25
9
6.75
4.5
2.25
0
Gauge Pressure (psi)
261
228
196
163
131
98
65
33
0