APG Kari Operating Manual

AUTOMATION

Operator’s Manual

PRODUCTS

GROUP, INC.

KA Series

Liquid Level Controls

9004020

Rev. B, 08/14

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

Tel: [phone] • Fax: [phone] • www.apgsensors.com • E-mail: [e-mail]

KA Series Rev. B, 08/14

Table of Contents

Warranty ...........................................................................................3

Introduction ......................................................................................4

Specications ...................................................................................5

Dimensions .......................................................................................5

Options .............................................................................................6

Chemical Compatibility—Corrosion Resistance .............................6

Cable Weights...................................................................................7

Cable Specications .........................................................................7

Switch Wiring and Type Detail Table ...............................................8

Selecting the Right Switch ................................................................9

Understanding the Switch Action/Terminology .............................10

Single vs. Dual Point Control ........................................................10

Single Point with Timed Relay Control ..........................................11

Emptying/Filling Pump Control Circuits .......................................11

Duplex Pump Control Circuit ........................................................12

Operating Level Adjustment...........................................................13

Termination and Height Fixing ......................................................14

Position in Tank/Swing Distance Allowance..................................15

Control Contact Ratings ................................................................16

Verifying Operation ........................................................................16

Tips .................................................................................................17

Certicate of Compliance...............................................................18

Automation Products Group, Inc.

2

APG...Providing tailored solutions for measurement applications

Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]

Rev. B, 08/14 KA Series

• Warranty and Warranty Restrictions

APG warrants its products to be free from defects of material and workmanship
and will, without charge, replace or repair any equipment found defective
upon inspection at its factory, provided the equipment has been returned,
transportation prepaid, within 24 months from date of shipment from factory.

THE FOREGOING WARRANTY IS IN LIEU OF AND EXCLUDES
ALL OTHER WARRANTIES NOT EXPRESSLY SET FORTH HEREIN,
WHETHER EXPRESSED OR IMPLIED BY OPERATION OF LAW OR
OTHERWISE INCLUDING BUT NOT LIMITED TO ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE.

No representation or warranty, express or implied, made by any sales
representative, distributor, or other agent or representative of APG which is

not specically set forth herein shall be binding upon APG. APG shall not be

liable for any incidental or consequential damages, losses or expenses directly
or indirectly arising from the sale, handling, improper application or use of the
goods or from any other cause relating thereto and APG’s liability hereunder, in
any case, is expressly limited to the repair or replacement (at APG’s option) of
goods.

Warranty is specically at the factory. Any on site service will be provided at the
sole expense of the Purchaser at standard eld service rates.

All associated equipment must be protected by properly rated electronic/
electrical protection devices. APG shall not be liable for any damage due
to improper engineering or installation by the purchaser or third parties.
Proper installation, operation and maintenance of the product becomes the
responsibility of the user upon receipt of the product.

Returns and allowances must be authorized by APG in advance. APG will
assign a Return Material Authorization (RMA) number which must appear on all
related papers and the outside of the shipping carton. All returns are subject to

the nal review by APG. Returns are subject to restocking charges as determined

by APG’s “Credit Return Policy”.

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]

3

KA Series Rev. B, 08/14

• Introduction

KA series controls consist of a free-oating switch enclosure to which a
protected multiconductor cable is attached. Inside the oat there are a number of
microswitches set at different angles. A control weight is xed at a point along
the cable to keep the cable immersed in the liquid. The suspended oat switch

follows the movement of the liquid level. As the liquid level rises and falls, the

weight on the cable causes the inclination of the oat to change. This tilting

action results in microswitches opening and closing, sequentially, at different
elevations. The switch-operating levels are easily adjusted by moving the weight
along the cable and/or altering the

height of the cable xing point.

The switch enclosure is conical
in shape and the required number of
microswitches are cast at predetermined
angles inside it. The hermetically sealed

oat housing is lled with plastic foam

and is weighted on one side. This

rugged oat and the weight are made

of chemically resistant polypropylene
while the standard cable is PVC coated.

There are three versions of the KA
series switch. The standard S Series
units are the largest, with a diameter of 6.7 inches, the C Series units have
a diameter of 3.9 inches, and the smallest, M series units, are 3.0 inches in
diameter.

Alarms Control Plus Alarms
Level IL IH IC 2HL 2L 3L 2H 3H 4L 4H 4L5E 4H5E

(1LE) (1HE) (3LE) (3HE)

Stop Both

HH — — — High — — — High Alarm
Alarm Pumps Alarm

Pump Pump Pump Pump Start Start
H — — — — Stop Start Stop Start Pump Pump
No.1 No.2

Pump Pump Pump Pump Start Start
L — — — — Start Stop Start Stop Pump Pump
No.2 No.1

LL Low High High/Low Low — Low — — Low Alarm
Alarm Alarm Alarm Alarm Alarm Pumps

O Height of Face of Float in Free-Hanging Position

High

Stop Both

Automation Products Group, Inc.

4

APG...Providing tailored solutions for measurement applications

Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]

Rev. B, 08/14 KA Series

• Specications

S Series C Series M Series
Contact Rating:
Max.V oltage 250 V AC/DC 250 V AC/DC 250 V AC/DC
Max. AC Current
(Resistive) 6 A 6 A 6A
(Inductive) 3 A 3 A 3A
Max. DC Power 75 VA 75 VA 75 VA
(75 VA = 0.3 A @ 250 V)
Max. liquid Temp 60°C (140°F) 60°C (140°F) 60°C (140°F)
Max. pressure (at 20°C) 28 PSI 28 PSI 28 PSI

Min. Fluid Specic Gravity 0.7 0.7 0.95

Standard Cable Length 16 ft. 16 ft. 16 ft.
Switching Differential:
Min. 10 in. 10 in. 10 in.
Max. 50 in. 50 in. 40 in.
Max. No. of Switching Levels 4 3 2
Max. No. of wires in Cable 5 4 3
Standard Weight Type

G (black-3/4 lb.) G (black-3/4 lb.) B (red-3/4 lb.)

• Dimensions - in./mm

S Series

2.13”

54.1 mm

4.25”

107.95 mm

6.1”

155 mm

6.70”

170 mm

Automation Products Group, Inc.

APG...Providing tailored solutions for measurement applications

Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]

5.6”

142.24 mm

C Series

5.0”

127 mm

3.90”

99 mm

M Series

3.0”

76 mm

5

KA Series Rev. B, 08/14

• Options

Higher working temperature to 80°C (175°F): Model K

Longer cables to specied lengths

Smaller switching differentials down to 1.25 in.

Greater switching differentials to 75 in. (S series) or 60 in. (M series)

Alternative logic at switching points (normally open vs. normally closed)

Alternative cables in rubber and urethane

Alternative cables in teon (max. 5 conductors = 4 or less switch points)

Lead weight in place of polypropylene-covered weight

Strain Relief Connector, Part #SRCG

• Chemical Compatibility — Corrosion Resistance of Materials

With a standard KA oat switch, the only materials in contact with the liquid are
the polypropylene covered oat and weight, the heavy duty PVC coated cable,

and the polypropylene wedge. Consequently, these switches are unaffected by a
wide range of liquids. However, there are some liquids that are not compatible
with these materials. For such applications, alternative construction materials
are available as indicated in the Options section above. In assessing corrosion,
key factors are the liquid’s temperature and concentration, and the amount of

time the oat is immersed. Even if periodic replacement of KA oat switches

is necessary, they still may be the most economical choice. Rubber cables are
preferred for applications where freezing conditions can occur, because PVC­coated cables tend to stiffen in such situations.

Automation Products Group, Inc.

6

APG...Providing tailored solutions for measurement applications

Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]