User Guide

ManualsBrandsCaleffi ManualsFlow SwitchesReplacement Paddle Assembly for 626 Universal Flow Switch (Stainless Steel)

Electrical Data

Max Voltage: 250 VAC

Current: 15 A

Electrical connection: 1/2” NPT threaded

Protection class: NEMA type 5 (IP54)

Certiﬁcation Mark:

SAFETY INSTRUCTION

This safety alert symbol will be used in this manual to draw attention to

safety related instructions. When used, the safety alert symbol means

ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!

FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN

A SAFETY HAZARD.

CONSIGNE DE SÉCURITÉ

Ce symbole d'avertissement servira dans ce manuel à attirer l'attention sur la sécurité concernant

instructions. Lorsqu'il est utilisé, ce symbole signiﬁe ATTENTION ! DEVENEZ ALERTE !

VOTRE SÉCURITÉ EST EN JEU ! NE PAS SUIVRE CES INSTRUCTIONS PEUT

PROVOQUER UN RISQUE DE SÉCURITÉ.

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 criti

cal components and impair the operation of

temperature sensitive safety and protection devices.

Flow Switch

626 Series

68235.0

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: 1” NPT male

Maximum operating pressure: 150 psig (10 bar)

Maximum temperature of the ﬂuid: 250° F (120°C)

Minimum temperature of the ﬂuid: -20° F (-30°C)

Maximum ambient temperature: 130° F (55°C)

Suitable for pipes: 1” to 8” (25 to 200 mm)

www.cale.com

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.

Summary of content (4 pages)

PAGE 1
www.caleffi.com 68235.05 Flow Switch © Copyright 2018 Caleffi 626 Series 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.
PAGE 2
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. AVERTISSEMENT: Ce produit peut vous exposer à des produits chimiques comme le plomb, qui est connu dans l’État de Californie pour causer le cancer, dommages à la naissance ou autre. Pour plus d’informations rendez-vous www.P65Warnings.ca.gov.
PAGE 3
Electrical Connections Unscrew the four cover screws and lift off the outer cover. Make sure the wires do not obstruct the function of the switch mechanism. Assurez-vous que les fils ne sont pas entraver le fonctionnement de la changer le mécanisme. Diagrams showing the internal connections of the micro-switch with: Line input Flow switch used to activate a device when flow stops.
PAGE 4
Calibration B A C The minimum and maximum operating flow rates are given in the table below. Adjustments should be carried out as follows: turn the calibration screw (A) in a clockwise direction for the contacts to close at higher flow rate values or in a counterclockwise direction for lower flow rate values. When the adjustment has been made lock the screw (A) with the locking ring nut (B). Avoid all contact with the presetting screw (C).