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Electrical Connections: 

Unscrew the four cover screws and lift off the outer cover .

Flow  switch used to  activate  a  device  when  
flow  stops.  When  the  decreasing  operating 
flow is reached or stops the common (black 
wire) and the normally open (red wire) contacts 
open, while the common (black wire)  and  the 
normally closed (blue wire)  contacts  close. 

Flow  switch is used to activate a device  when 
flow starts. When flow starts and  the increasing 
operating flow is reached or exceeded, the 
common (black wire) and normallyopen (red 
wire)  contacts  are  closed, while the common 
(black wire) and the normally closed (blue wire) 
are open. 

 Diagrams showing the internal connections of the micro-switch with: 

CAUTION:  

Make  sure  the  wires  do  not  obstruct  the  

function of the switch mechanism. 

AVERTISSEMENT: 

Assurez-vous que les fils ne 

sont pas entraver le fonctionnement de la changer le  
mécanisme. 

5

CAUTION: 

In order to maintain NEMA 3 (IP54) protection of internal switching components, included 

strain relief must be used.

AVERTISSEMENT: 

Afin de maintenir la protection NEMA 3 (IP54) des composants de commutation 

internes, le serre-câble inclus doit être utilisé.

Summary of Contents for Uni-Switch 626 Series

Page 1: ...tainless steel is used in the construction of many key parts including the bellows which protects the switch from corrosion With a protection classi cation of NEMA type 3 IP54 the switch can be used i...

Page 2: ...Teflon provides lubricity so that care must be exercised not to over tighten joints Failure to follow these instructions could result in property damage and or personal injury CAUTION Electrical shoc...

Page 3: ...r lubrifiant Teflon permet de sorte qu il faut prendre soin de ne pas trop serrer les articulations Le non respect de ces instructions peut entra ner des dommages mat riels et ou des blessures ATTENTI...

Page 4: ...on the cover and on the switch mounting plate When tted the distance between the upper surface of the pipe and upper surface of the switch mounting plate should be 3 1 8 80 mm The tee connection in th...

Page 5: ...ded the common black wire and normallyopen red wire contacts are closed while the common black wire and the normally closed blue wire are open Diagrams showing the internal connections of the micro sw...

Page 6: ...e calibration screw A i n a clockwise direction f or the contacts to close at higher ow rate values or in a counterclockwise direction for lower ow rate values When the adjustment has been made lock t...

Page 7: ...Operating ow rates gpm lpm 7...

Page 8: ...Caleffi North America Inc 3883 West Milwaukee Road Milwaukee WI 53208 T 414 238 2360 F 414 238 2366 8 NOTES 12 2022...

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