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STEP 2 - Connecting the Flow Switch to Pipe

FLOW

b.

Insert pipe threads into flow switch and turn 2 
or 3 times until tight.
• Place one pipe wrench on hex fitting of flow 

switch and one wrench on connecting piping.
Tighten to following torque values.
- 31 ft•lb (42 N•m) for 1/2” pipe

• Repeat to connect pipe to opposite side of 

flow switch.

a.

Apply pipe sealing compound or Teflon

®

tape to the 

pipe threads.

NOTE:

Do not apply sealant to first threads as this 

switch is grounded (earthed) via the pipe mounting.

Summary of Contents for McDonnell & Miller FS1 Series

Page 1: ...To prevent an electrical fire or equipment damage electrical wiring insulation must have a rating of 167 F 75 C if the liquid s temperature exceeds 180 F 82 C To prevent electrocution when the electr...

Page 2: ...tch operation rate of less than once per 2 5 minutes and any one cycle greater than 3 seconds on and 3 seconds off For applications with loads 0 5 and 38mA power fac tors exceeding 0 65 an anticipated...

Page 3: ...n of the Flow Switch D 5 x D MINIMUM 1 2 PIPE 5 x D MINIMUM FLUID FLOW D PIPE DIAMETER The flow switch should be located in a horizontal section of pipe where there is a straight horizontal run of at...

Page 4: ...hex fitting of flow switch and one wrench on connecting piping Tighten to following torque values 31 ft lb 42 N m for 1 2 pipe Repeat to connect pipe to opposite side of flow switch a Apply pipe seali...

Page 5: ...trical Installation To prevent electrical shock turn off the electrical power before making electrical connections To prevent an electrical fire or equipment damage electrical wiring insulation must h...

Page 6: ...itch will be used to actuate a signal alarm or other device when no flow occurs connect the wire from that device to the N C contact Connect the Hot power supply wire to C terminal Flow Opens Circuit...

Page 7: ...quired flow switch may need to be adjusted OFF ON SECTION 4 Testing STEP 5 Adjustment 1 2 Pipe Connection Adjusting Screw Adjustment is necessary only if required flow no flow setpoints are above fact...

Page 8: ......

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