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FlowLine Thermo-Flo LC80 Series, Manual

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FlowLine Thermo-Flo LC80 Series Manual Download Page 10

10

 

of

 

14

 

MN301530

 

Rev

 

B

 

APPLICATION

 

EXAMPLES

 

Step

 

Seven

 

Low

 

Flow

 

Alarm:

  

The

 

goal

 

is

 

to

 

indicate

 

when

 

the

 

flow

 

rate

 

falls

 

below

 

a

 

certain

 

point.

 

If

 

it

 

does,

 

an

 

alarm

 

is

 

supposed

 

to

 

sound,

 

alerting

 

the

 

operator

 

of

 

a

 

low

 

flow

 

condition.

  

The

 

flow

 

switch

 

is

 

wired

 

to

 

Input

 

1

 

and

 

the

 

alarm

 

is

 

wired

 

through

 

Relay

 

1.

  

If

 

power

 

is

 

accidentally

 

cut

 

to

 

the

 

controller,

 

the

 

sensor's

 

ability

 

to

 

notify

 

the

 

operator

 

of

 

a

 

low

 

flow

 

condition

 

could

 

be

 

lost.

   

The

 

system

 

must

 

alert

 

the

 

operator

 

not

 

only

 

to

 

low

 

flow,

 

but

 

to

 

controller

 

power

 

loss.

  

To

 

do

 

this,

 

connect

 

the

 

hot

 

lead

 

of

 

the

 

alarm

 

to

 

the

 

NC

 

side

 

of

 

the

 

relay

 

terminal

 

of

 

the

 

controller.

   

If

 

power

 

is

 

lost,

 

the

 

relay

 

will

 

be

 

de

‐

energized,

 

and

 

the

 

alarm

 

will

 

sound

 

(if

 

there

 

is

 

still

 

power

 

to

 

the

 

alarm

 

circuit

 

itself).

   

The

 

alarm

 

circuit

 

should

 

have

 

a

 

non

‐

interruptible

 

power

 

supply

 

or

 

some

 

other

 

indicator

 

or

 

backup

 

alarm

 

to

 

warn

 

of

 

a

 

power

 

failure

 

in

 

the

 

alarm

 

circuit.

 

In

 

this

 

application,

 

the

 

normal

 

status

 

is

 

when

 

the

 

sensor

 

is

 

in

 

the

 

flow

 

condition,

 

and

 

the

 

relay

 

will

 

be

 

energized

 

holding

 

the

 

alarm

 

circuit

 

Open.

   

 

If

 

the

 

switch

 

is

 

wired

 

NC,

 

the

 

input

 

LED

 

will

 

be

 

OFF

 

and

 

the

 

relay

 

LED

 

will

 

be

 

ON.

  

So

 

for

 

this

 

wiring

 

configuration,

 

Invert

 

should

 

be

 

set

 

to

 

the

 

ON

 

position.

   

 

If

 

the

 

switch

 

is

 

wired

 

NO,

 

the

 

input

 

LED

 

and

 

the

 

relay

 

LED

 

will

 

be

 

ON

 

simultaneously.

   

So

 

for

 

this

 

wiring

 

configuration,

 

Invert

 

should

 

be

 

set

 

to

 

the

 

OFF

 

(

‐

)

 

position.

 

 

Dual

 

Flow

 

Alarm:

  

The

 

goal

 

is

 

to

 

indicate

 

when

 

the

 

flow

 

rate

 

falls

 

below

 

a

 

certain

 

point

 

on

 

two

 

different

 

lines.

 

If

 

it

 

does,

 

an

 

alarm

 

is

 

supposed

 

to

 

sound,

 

alerting

 

the

 

operator

 

of

 

a

 

low

 

flow

 

condition

 

for

 

the

 

specific

 

line.

  

For

 

Line

 

#1,

 

the

 

flow

 

switch

 

is

 

wired

 

to

 

Input

 

1

 

and

 

the

 

alarm

 

is

 

wired

 

through

 

Relay

 

1.

  

For

 

Line

 

#2,

 

the

 

flow

 

switch

 

is

 

wired

 

to

 

Input

 

2A

 

and

 

the

 

alarm

 

is

 

wired

 

through

 

Relay

 

2.

  

Accidental

 

power

 

cut

 

to

 

the

 

controller

 

must

 

be

 

taken

 

into

 

account

 

as

 

in

 

the

 

Low

 

Flow

 

Alarm

 

example

 

seen

 

above.

  

Follow

 

the

 

same

 

logic

 

for

 

Low

 

Flow

 

Alarm

 

as

 

with

 

Dual

 

Flow

 

Alarm.

   

In

 

this

 

application,

 

the

 

normal

 

status

 

is

 

when

 

the

 

sensor

 

is

 

in

 

the

 

flow

 

condition,

 

and

 

the

 

relay

 

will

 

be

 

energized

 

holding

 

the

 

alarm

 

circuit

 

Open.

   

 

If

 

the

 

switches

 

are

 

wired

 

NC,

 

the

 

input

 

LED

 

will

 

be

 

OFF

 

and

 

the

 

relay

 

LED

 

will

 

be

 

ON.

   

So

 

for

 

this

 

wiring

 

configuration,

 

Invert

 

should

 

be

 

set

 

to

 

the

 

ON

 

position.

   

 

If

 

the

 

switches

 

are

 

wired

 

NO,

 

the

 

input

 

LED

 

and

 

the

 

relay

 

LED

 

will

 

be

 

ON

 

simultaneously.

   

So

 

for

 

this

 

wiring

 

configuration,

 

Invert

 

should

 

be

 

set

 

to

 

the

 

OFF

 

(

‐

)

 

position.

 

Summary of Contents for Thermo-Flo LC80 Series

Page 1: ...Rev B MN301530 1 of 14 Thermo Flo Remote Flow Controller LC80 LC82 Series Manual Flowline Inc 10500 Humbolt Street Los Alamitos CA 90720 Tel 562 598 3015 Fax 562 431 8507 www flowline com...

Page 2: ...to 60 second delay Easy setup with LED indicators for sensor s power and relay status 35mm DIN rail mount polypropylene enclosure with removable terminal strips Invert switch changes relay state from...

Page 3: ...tact delay 0 to 60 seconds Electronics temp F 40 to 158 C 40 to 70 Enclosure rating 35mm DIN EN 50 022 Enclosure material PP U L 94 VO Fail safety Power fail safe Classification General purpose Approv...

Page 4: ...mmended Wiring should be performed by qualified personnel in accordance with all applicable national state and local electrical codes Flammable or Explosive Applications The entire LC80 series remote...

Page 5: ...nt sensor technologies where possible While this manual offers some examples and suggestions to help explain the operation of FLOWLINE products such examples are for information only and are not inten...

Page 6: ...oad of not more than 10 amps for reactive loads the current must be derated or protection circuits used When the red LED is ON and the relay is in the energized state the NO terminal will be closed an...

Page 7: ...C will be used in different applications Remember that the normal state is when the relay coil is de energized and the Red relay LED is Off de energized Both terminals share the Common C terminal When...

Page 8: ...hite can also be wired to the flow controller See the illustration below to indicate wiring for your switch and the polarity of the switch output Note the Shield wire will be used only for long cable...

Page 9: ...whether the switch is in a Flow or No Flow state With the flow switch wired NC the Amber LED indicates No Flow and no LED indicates flow Wiring the switch NO reversing the Red and Black wires the Ambe...

Page 10: ...and the relay LED will be ON So for this wiring configuration Invert should be set to the ON position If the switch is wired NO the input LED and the relay LED will be ON simultaneously So for this w...

Page 11: ...le through the potentiometer If the LED is on slowly adjust the potentiometer counterclockwise with a small flat head screwdriver until the LED turns off The adjustment is a single turn 270 potentiome...

Page 12: ...hat relay click on and off as well as the relay LED The Flow or No Flow is not switching at the correct flow rate The flow switch may need to be adjusted Review the Flow Switch Calibration section on...

Page 13: ...r auto empty applications The only change is that the relay will energize when the top is wet bottom is also wet and de energize when the bottom is dry top is also dry In both scenarios when the level...

Page 14: ...ocedures outlined above 2 have been subjected to electrical mechanical or chemical damage due to improper accidental or negligent use 3 have been modified or altered 4 anyone other than service person...

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