CALEFFI Uni-Switch 626 Series Manual

Uni-Switch™ Universal Flow Switch
© Copyright 2022 Caleffi

General Characteristics

A stainless steel bellows separates the electrical and hydronic sections, preventing the possibility of
contact of the fluid with the electrical components. Stainless steel is used in the construction of many key
parts, including the bellows, which protects the switch from corrosion.
With a protection classification of NEMA type 5 (IP54), the switch can be used in particularly humid and
dusty environments. The cover is made of a special non-combustible plastic material. The normally open
and normally closed contacts on the switch enable any electrical device to be switched on or off as
required at the operating flow rate. The operating point can be easily adjusted with the calibration screw

Technical Characteristics

Connection size:
Maximum operating pressure:
Maximum temperature of the fluid:
Minimum temperature of the fluid:
Maximum ambient temperature:
Suitable for pipes:

Electrical Data

Max. Voltage:
Max. Current:
Electrical connection:
Protection class:
Certification Mark:

Function

The Caleffi Series 626 water flow switch detects the presence or
absence of flow in piping of heating, air conditioning, cooling and water
treatment systems as well as in pumping and process systems. In
heating systems, the flow switch is normally used to shut off the burner
of the boiler whenever there is no circulation of the carrier fluid in the
boiler circuit. A lack of circulation can damage critical components and
impair the operation of temperature sensitive safety and protection
devices.
This item is designed for use in closed hydronic systems. Do not use in
plumbing applications. This item does not meet the low-lead plumbing
standards of U.S. and Canada.
1
68235.06
626 Series
.
1" NPT male
150 psig (10 bar)
° °
250 F (120 C)
° °
-20 F (-30 C)
° °
130 F (55 C)
1" to 8" (25 to 200mm)
250 VAC
15A
½" NPT threaded
NEMA type 5 (IP54)