Dwyer Instruments CFS2 Series User manual

The Series CFS2 Cable Float Switch is a mechanically actuated floating switch

intended to activate electrical components, usually pumps, to start and stop

automatically. The CFS2 is perfect for simple level control of liquids for filling or

draining reservoirs and tanks. Float switches such as the CFS2 are the most

universally used for pump automation due to their high reliability, economical

pricing, and easy installation. Counterweights and cable hangers are available to

suit a variety of mounting applications. Optional cables available include those with

UL/CSA approval, higher chemical compatibility, high temperature durability, oil

resistance, and drinking water suitability. Contact factory for piggyback plug option,

gold contact switch option and cable length options ranging from 10 to 70 ft (3.04

to 21.34 m).

Series CFS2 Cable Float Switch

Specifications - Installation and Operating Instructions

Bulletin L-CFS2

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: [email protected]

SPECIFICATIONS

Service: Compatible liquids.

Wetted Materials:

Housing: Polypropylene;

Cable: CFS2-XXPXX-XX: PVC;

CFS2-XXNXX-XX: Neoprene;

CFS2-XXSXX-XX: 3x16 AWG SJOW;

CFS2-XXTXX-XX: Rubber compound EM7 quality;

CFS2-XXWXX-XX: EPDM ethylene propylene.

Temperature Limits: 32 to 122°F (0 to 50°C).

Pressure Limits: 14.5 psi (1 bar).

Enclosure Rating: IP68.

Switch Type:

CFS2-DXXXX-XX: SPDT;

CFS2-CXXXX-XX: SPST;

CFS2-OXXXX-XX: SPST.

Electrical Rating:

CFS2-XXAXX-XX

10 (4) A @ 250 VAC;

CFS2-XXBXX-XX

10 (8)A @ 250 VAC;

CFS2-XXCXX-XX

10 (8)A @ 250 VAC;

10 (6)A @ 400 VAC;

CFS2-XXDXX-XX

1 HP @ 125 VAC 16 FLA;

2 HP @ 250 VAC 12 FLA;

CFS2-XXEXX-XX

0.05 A @ 250 VAC.

Shipping Weight:

Housing: 5.43 oz (154 g);

Cable: 0.77 oz (21.27 g) per foot.

Agency Approvals: CFS2-XGDSX-XX: UL and CSA approved, all others CE.

5-5/32

[131.00]

1-41/64

[41.50]

6-15/64

[158.50]

4-9/64

[105.00]

3-3/16

[81.00]

L-CFS2:SSS-1000 12/8/10 8:39 AM Page 1

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INSTALLATION INSTRUCTIONS

The basic operating principle of the CFS2 is very simple. As fluid level rises the float

will also rise, resulting in a tilt of the micro-switch located inside the housing. This tilt

will generate a signal that can be used to actuate a motor or signal an indicator alarm.

To ensure the proper function of the CFS2, it is necessary to secure the electric cable

inside the tank or well as illustrated in Figures 1 and 2. The length of the cable

measured between the fixture point and the body of the CFS2 determines the total

extension of the float and also the resulting distance between the pump stopping and

starting level. It is essential to ensure that there are no obstructions in the CFS2

operational area before operation. During operation, adjustments to the CFS2 cable

must not be made under any circumstances, due to the fact that any unwanted

cable connections made while the CFS2 is immersed in water can lead to electric

shock. There are two installation options for this cable float switch. One method is to

fix the cable of the CFS2 to the reservoir or container with the use of a small clamp,

another technique would be to attach the accessory A-457 counterweight to the cable

of the float switch a desired distance between the highest and lowest level desired.

Note: With the use of the counterweight, the length of cable between the float and

fixed point (starting and stopping indication) can be freely adjusted.

ELECTRICAL CONNECTIONS

The Series CFS2 features a variety of different cable options. One of these options

includes the selection between SPST and SPDT. SPST, single pole single throw,

allows a single operating function with the choice of operation on increasing level

(NC/filling) or operation on decreasing level (NO/emptying), depending on the model

selection. SPDT, single pole double throw allows for operation of both increasing and

decreasing level, depending on the connections made between the terminals of the

micro-switch and the cable. SPDT, which is a four-conductor cable (ground option) or

a three-conductor cable (without ground option), has one lead that is common, one

that is normally open (NO), and the other that is normally closed (NC), for the proper

connections of these conductors please refer to the wiring diagrams in Figures 3 to

12.

Figure 2-Filling

Figure 1-Empyting

When making the connections described above, ensure that the

maximum motor power does not exceed the values indicated on

the level switch. The power supply cable is an important part of the CFS2. Should the

cable appear to be damaged, discontinue use immediately and proceed to replace the

unit. The yellow/green wire found on some units is the ground wire and must be

connected to a suitable ground terminal with the dimension greater than 1 mm2. The

terminal used must also be protected against accidental break.

NOTICE

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3 x 1 CABLE

BROWN

BLUE L

COM

BROWN

BLUE L

COM

BROWN

BLACK L

COM

N.O.

N.C.

BLUE

BROWN

BLACK L

COM

N.O.

N.C.

BLUE

YELLOW

GREEN

BROWN

BLUE L

COM

YELLOW

GREEN

BROWN

BLUE L

COM

BROWN

BLACK L

COM

N.O.

N.C.

BLUE

YELLOW

GREEN

BROWN

BLACK L

COM

N.O.

N.C.

BLUE

GREEN

YELLOW

GREEN

WHITE

BLACK L

COM

GREEN

WHITE

BLACK L

COM

CFS2-ONXXX-XX

CFS2-DNXXX-XX

CFS2-OGXXX-XX

CFS2-DGXXX-XX

Figure 11-Emptying (NO) Function Figure 12-Filling (NC) Function

CFS2-DGXXX-XX

CFS2-CGXXX-XX

CFS2-DNXXX-XX

Figure 4-Filling (NC) Function

Figure 3-Emptying (NO) Function

Figure 5-Double Function (Emptying (NO))

Figure 7-Emptying (NO) Function

Figure 9-Double Function (Emptying (NO))

CFS2-CNXXX-XX

Figure 6-Double Function (Filling (NC))

Figure 8-Filling (NC) Function

Figure 10-Double Function (Filling (NC))

CFS2-OGESX-XX CFS2-CGESX-XX

2 x 1 CABLE

3G1 CABLE

4G1 CABLE

SJOW 3 x 16 AWG CABLE (UL APPROVED)

Correctly insulate any wire not in use!

WIRING DIAGRAMS

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INSTALLATION OF COUNTERWEIGHT

For correct counterweight installation, refer to the following procedure as well as

the illustration in Figure 13.

1. Insert the cable into the counterweight, turning it. This will result in the

detachment of the plastic ring inserted in the mouth (if necessary use a

screwdriver to aid in the detachment of the ring). Place the ring at the point on

the cable where the counterweight is to be attached.

2. Attach the counterweight on the ring by turning it and using moderate pressure.

(Counterweight sold separately).

MAINTENANCE & REPAIR

Inspect and clean wetted parts with water or damp cloth at regular intervals.

Disassembly or modifications made by the user will void the warranty and could

impair the continued safety of the product. If repair is required obtain a Return

Goods Authorization (RGA) number and send the unit, freight prepaid, to the

address below. Please include a detailed description of the problem and conditions

under which the problem was encountered.

Dwyer Instruments, Inc.

Attn: Repair Department

102 Indiana Hwy 212

Michigan City, IN 46361

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: [email protected]

Figure 13-Counterweight Installation

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