KELCO C25 Series Installing And Operating Information

Please read these installation and operating instructions fully and carefully before installing or servicing this Flow Switch. The C25
Series flow switch is a mains voltage device. Death or serious injury may result if this switch is not correctly installed and operated. All
electrical work on this switch must be performed by a fully qualified and licensed Electrician.
INSTALLATION
The C25 flow switch can be installed in any location in vertical
or horizontal pipes. In vertical pipes flow can be either
upward or downward through the switch. Where possible
install a union on the inlet and outlet of the flow switch to
allow easy removal for cleaning or servicing. Ensure the flow
switch is oriented correctly to the direction of flow.
The male threaded end of the switch is the inlet. When
installing make sure no thread tape or other material from the
installation becomes entrained in the switch. Also ensure no
foreign matter can enter the flow switch from tanks or
pipework. Where scale or entrained material may be present
always install a Y-strainer in the inlet pipe directly before the
switch. Note that this flow switch operates magnetically and
is therefore not suited to any application where iron or iron
scale may be present in the process liquid.
The electrical module that saddles the flow switch body can
be removed or loosened if required to allow the body of the
switch to be screwed into tight locations, for example into the
discharge port of a pump. To completely remove the electrical
module undo the 4 self tapping screws that secure the two
halves of the module together, the sealed electrical module
then simply lifts off. Under no circumstances should the
C25-R module be operated electrically under a high
amperage load unless suitably attached to the flow switch
body.
WARNING
All electrical work associated with the C25 inline flow switch must be
carried out by qualified electrical personnel and all electrical work must
conform to AS/NZ (or equivalent) standards and to local wiring rules.
The C25 flow switches are available in one of two basic electrical
configurations. There is a model number and an electrical rating on the
inside of every switch. The electrical rating of the two types of modules
is set out in the following table.
Electrical Module Type
Module
B Dry contact reed
switch
Solid state switch
R
Note: The switched power of the C25-R module given above refers to a switch operating in a water pipe system at ambient temperature. The
solid state switch built into the C25-R can tolerate locked rotor motor currents to 40 Amps continuous.
INSTALLING AND OPERATING THE KELCO
C25 SERIES FLOW SWITCH
Contact Switched Power
Confi guration
S.P.S.T Normally
Open
S.P.S.T Normally
Open
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WARNING
REFITTING ELECTRICAL MODULES
The electrical module of the C25 flow switch can be oriented
to suit the application. It can be mounted in either direction
on the switch body and can be rotated around the switch
body to any required position. All modules are normally off
switches that turn on in response to flow. Reversing the
orientation of the electrical module does not reverse the
action of the switch. To refit a module to the switch body, fit
and tighten the 4 stainless self-tapping screws.
ENVIRONMENTAL LIMITATIONS
Many applications will benefit from a non-return valve in the
pipework directly before the flow switch. This flow switch is
not designed to operate as a one-way valve and rapid or high
pressure flow reversal may damage the piston in the switch. A
simple non-return valve directly before the flow switch will
reduce the possibility of damage due to flow reversal.
This flow switch is suitable for use with hot or cold liquids up
to 90ºC continuous. Systems can be steam sterilized at
100ºC for short periods without damaging the switch.
ELECTRICAL DATA
ELECTRICAL DATA
After installing or servicing this flow switch always replace its lid and fully
tighten its lid screw. Also ensure the cable gland is fully tightened. Never
leave the lid off the inline flow switch for extended periods. Without its lid
in place this Inline Flow switch is not water resistant and presents a
potential shock hazard. Take great care not to splash water onto the inside
of the Inline Flow switch's electrical housing when the lid is not in place.
Without its lid the Inline Flow switch is not weather or insect proof and
presents a potential shock hazard that may result in death or serious injury.
Switched Voltage
Maximum Maximum
40Watts 240V AC 200V DC
3kW 4HP 5 to 240V AC
WARNING
Switched Current Inductive Loads
Resistive AC (Power Factor
(rms) 4.0)
1 Amp Maximum Not Suitable
40 Amps at 240V
10mA Minimum 40
Amps Maximum
Typical
Application
PLC Telemetry
and relay logic
circuits
AC control circuits
and motor control