KELCO Ub25 Manuale utente

INSTALLATION

INTRODUCTION

INSTALLATION AND OPERATION INSTRUCTIONS FOR

THE UB25 IN LINE FLOW SWITCH

OPERATING ENVIRONMENT

The UB25 ow switch is a magnetically operated switch that will turn on or off in response to liquid ow. The body of the switch contains a piston that partly

obstructs the line of ow. To pass through the switch, the process liquid must push the piston back and ow over it and out through the outlet of the switch.

When owing liquid pushes the piston back, a magnet inside the piston actuates a reed switch in the electrical housing. The reed switch is used to provide

a set of closed (or open) electrical contacts that are either used directly as a switch, or to control an in built Triac or relay which in turn is used as the output

device.

The output of the switch can be used in control circuits to indicate ow, or to directly actuate small pump motors. The body of the UB25 ow switch contains

a second magnet that opposes the magnet in the piston. The repulsive force generated between the piston and the body magnets constantly pushes the

piston back to the off position, against the incoming ow. This unique magnet system negates the need for metal springs and provides the switch with

exceptional reliability.

The UB25 ow switch has a high pressure rated solid metal body, suitable for applications involving neutral liquids such as hot or cold water, or oils. The

UB25 ow switch contains a close tting piston, and should only be used in applications where the process uid is reasonably clean and free of entrained

or suspended material. This switch should not be used with uids containing large particulate matter, ferrous materials or brous matter. If the degree of

contamination of the process uid can’t be guaranteed, then suitable line ltration should be tted to the system. The standard UB25 ow switch is

constructed from solid brass. The piston and electrical housing are made from glass reinforced polypropylene.

The UB25 ow switches are weatherproof to IP67 and they are suitable for all outdoor exposed applications. The switch should be protected from exposure

to liquid temperatures in excess of 90°C. The UB25 series ow switch should not be used in applications where the line pressure exceeds 200 bars, in the

interest of safety, the switch has a burst pressure rating of >400 bars. Care should be taken not to expose this ow switch to excess back pressures such

as may be generated by a sudden reverse ow. In such applications, a dedicated non return valve should be tted to the system. The environmental

limitations and the main performance parameters of both models are set out in the table below.

The UB ow switch can be mounted in any orientation in the pipe work, including upside down. There is a direction of ow arrow on he electrical enclosure.

This directionality must be adhered to, as the switch will not operate against a reversed ow. Pipe work can be used to support the switch, or the switch

can be screwed directly into valve manifolds or pump ports. Use thread tape or sealant and do not use this ow switch as a non-return valve.

For increased sensitivity, UB25 inline ow switch is supplied with a non-magnetic piston retainer. The non-magnetic piston retainer is for use in vertically

mounted applications only. Please see maintenance details overleaf for information on installing the non-magnetic piston retainer.

OPERATING PARAMETERS

WARNING

Please read these installation and operating instructions fully and carefully before installing or servicing this Inline

Flow Switch. The UB25 Series in line ow switch is mains voltage device. Death or serious injury may result if this

switch is not correctly installed and operated. All electrical work must be performed by a fully qualied and licenced

electrician.

Parameters UB25 Standard UB25 With supplied non-magnetic piston retainer tted

Switching Point on a Slowly Rising Flow +/-15% 1.5 Litres per Minute 30 Litres Per Hour +-10%

Switching Point on a Slowly Falling Flow +/- 15% 1.2 Litres per Minute 30 Litres Per Hour +-10%

Minimum Gravity Head Required to Actuate the Switch 1.5 Metres 0.5 Metres

Maximum Recommended Continuous Flow (Water) 90 Litres per Minute 90 Litres per Minute

Maximum Recommended Operating Pressure,

Static or Dynamic

200 Bars (2900 PSI) 200 Bars (2900 PSI)

Minimum Burst Pressure 400 Bars (5800 PSI) 400 Bars (5800 PSI)

Maximum Liquid Temperature 90ºC 90ºC

Minimum Liquid Temperature -20ºC -20ºC

Ingress Protection Rating (Weatherproof Rating) IP67 IP67

ELECTRICAL

This ow switch can be supplied with one of four optional

electrical modules. The details of the various modules are

set out in the table below. The model of the switch and its

electrical module is indicated by a label xed to the inside of

the electrical enclosure of every switch.

MAINTENANCE

Please Note: All UB25 series ow switches use reed switches as the primary switching element. Reed switches are one of

the most reliable mechanical switching devices ever devised. They offer an operating life in excess of 100 million cycles,

however, care needs to be taken to ensure they are not electrically overloaded or if applied in questionable applications,

suitable protection should be added to the control circuit.

If the UB25 ow switch is correctly installed and if the process uid is compatible with the materials of construction of this

switch, then a very long maintenance free service life can be expected. Factors that may contribute to early failure of this

ow switch include excess temperature, excess pressure or electrical loads in excess of the circuit boards rating.

To service the piston or to install the non-magnetic piston retainer, Use a pair of long nosed pliers to remove the spring

Circlip located in the outlet port of the switch. Press the piston back with your nger, it should pop out along with its three

nned magnetic spider. Ensure there are no pieces of iron scale adhered to the piston or spider and that both parts are free

of damage. Reassemble the switch and test it to ensure the piston is a free and smooth t.

Most component of this switch are available in spare part kits.

ELECTRICAL DATA

WARNING

All electrical work associated with the UB25 Series in line

Flow Switch must be carried out by qualied electrical

personnel and all electrical work must conform to AS/NZ

(or equivalent) standards and to local wiring rules.

MODEL MODULE

TYPE

CONTACT

CONFIGURATION

SWITCHED

POWER

MAXIMUM

SWITCHED

VOLTAGE

MAXIMUM

SWITCHED

CURRENT

RESISTIVE AC

(RMS) MAXIMUM

INDUCTIVE LOADS

(POWER FACTOR

0.4)

TYPICAL APPLICATION

UB25-B Dry Reed

Switch

S.P.S.T N.O 40W 240V AC

200V DC

1 Amp Not Suitable PLC and General

Control Circuits

UB25-C Dry Reed

Switch

S.P.D.T.

Break Before Make

20W 140V AC

150V DC

1 Amp Not Suitable PLC Control and

Safety Showers

UB25-R Solid State

Relay

S.P.S.T. 750W 12 TO 240V

Spike to 40 Amp 4A at 240V AC

AC Control Circuits and

AC Motor Control to a

Maximum of 1 HP, 0.75KW

KELCO Engineering Pty Ltd

ABN 20 002 834 844 Head office and factory: 9/9 Powells Road Brookvale NSW 2100 Australia. Postal Address: PO Box 7485 Warringah Mall Post

Shop Brookvale NSW 2100 Australia. Phone: +61 2 9905 6425 Fax: +61 2 9905 6420 Email: [email protected] Web: www.Kelco.com.au

PLEASE NOTE: Kelco Engineering Pty Ltd reserves the right to change the specication of this product without notice. Kelco Engineering Pty Ltd accepts no liability for personal injury or economic loss as

can be downloaded from: http://www.kelco.com.au/warranty

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