Dwyer L6 User Manual

Bulletin E-20

Model L6

Specifications - Installation and Operating Instructions

xplosion-Proof; UL and CSA Listed -

E Class I, Groups *A, B, C, & D Class II, Groups E, F & G Directive 94/9/EC (ATEX) Compliant for

I 2 G Ex d IIC T6 Gb Process Temp≤75°C

ECEx Compliant for Ex d IIC T6 Gb Process Temp≤75°C

(Group A, stainless steel body only)

Float Switch

PECIFICATIONS

ervice: Liquids compatible with

wetted materials.

Wetted Materials:

Float: Solid polypropylene or 304

ower Body: Brass or 303 SS.

agnet: Ceramic.

xternal Float Chamber (Tee):

Matches lower body choice of brass or 303 SS. Other: Lever Arm, Spring, Pin, etc.:

01 SS.

emperature Limit: -4 to 220°F (-20 to

05°C) Standard, MT high temperature

1 option 400°F (205°C)(MT not UL, CSA, ATEX, IECEx and KC). ATEX compliant AT, IECEx IEC and KC option ambient temperature -4 to 167°F (-20 to 75°C)

rocess temperature: -4 to 220°F (-20

o 105°C).

ressure Limits: See next page.

P Enclosure Rating: Weatherproof and

xplosion-proof. Listed with UL and

SA for Class I, Groups A, B, C and D;

C Class II, Groups E, F, and G. (Group A on stainless steel body models only).

0344 II 2 G Ex d IIC T6 Gb

Process Temp≤75°C.

C-Type Certificate No.: KEMA

E 04ATEX2128. ATEX Standards: EN 60079-0: 2009; EN60079-1: 2007. IECEx Certified: For Ex d IIC T6 Gb Process Temp≤ 75°C.

ECEx Certificate of Conformity:

ECEx DEK II.0039.

I IECEx Standards: IEC 60079-00: 2007; IEC 60079-1: 2007. Korean Certified (KC) for Ex d IIC T6

b Process Temp≤75°C.

TL Certificate Number: 2012-2454-75.

witch Type: SPDT snap switch

tandard, DPDT snap switch optional.

s Electrical Rating: UL models: 5A @ 125/250 VAC (V~). CSA, ATEX and IECEx models: 5A @ 125/250 VAC

V~); 5A res., 3A ind. @ 30 VDC (V ).

(

V option: .1A @ 125 VAC (V~). MT

ption: 5A @125/250 VAC (V~). [MT

o option not UL, CSA, ATEX or IECEx]. Electrical Connections: UL models: 18 AWG, 18˝ (460 mm) long. ATEX/CSA/IECEx models: terminal

lock.

pper Body: Brass or 303 SS.

onduit Connection: 3/4˝ male NPT

standard, 3/4˝ female NPT on junction

ox models.

rocess Connection: 1˝ male NPT on

models without external float chamber, 1˝ female NPT on models with external float chamber. Mounting Orientation: Horizontal with

ndex arrow pointing down.

i Weight: Approximately 1 lb (.5 kg) without external float chamber, 1.75 lb (.8 kg) with external float chamber. Specific Gravity: See next page.

Example

Series Construction Upper Body Material Lower Body Material Circuit (Switch) Type Line Size

Tee and Float Options

Switch Options

Options

* Options that do not have ATEX, IECEx or KC.

L6L6EPEPB

B S

S D

3 4 5 6

0 A B C H L S

MV MT

AT CSA IEC KC GL ID JCT JCTLH TBC TOP

L6EPB-B-S-3-B-MT level switch; brass upper housing, brass lower housing, brass tee with Polypropylene spherical float, SPDT snap switch, and high temperature option Series L6 level switch Explosion proof and weatherproof Brass 303 Stainless Steel Brass 303 Stainless Steel SPDT DPDT 1˝ NPT 1-1/4˝ NPT (No tee models only) 1-1/2˝ NPT (No tee models only) 2˝ NPT No Tee, Solid Polypropylene Spherical Float* No Tee, 304 SS Cylindrical Float Brass Tee, Solid Polypropylene Spherical Float* No Tee, 304 SS Spherical Float Brass Tee, 304 SS Spherical Float 303 SS Tee, 304 SS Spherical Float 303 SS Tee, Solid Polypropylene Spherical Float* Gold Contacts on snap switch for dry circuits (see specifications for ratings) High Temperature switch rated 400°F (205°C) (see specifications for ratings)* ATEX approved construction (with JCT option standard) CSA approved construction (with JCT option standard)* IECEx approved construction (with JCT option standard) KC approved construction (with JCT option standard) Ground Lead* Customer Information on standard nameplate Weatherproof and explosion-proof junction box* Weatherproof and explosion-proof junction box, left side Terminal Block Connector* Top Mounted (No tee models only)*

Attention: Units without the “AT” suffix are not Directive 94/9/EC (ATEX) compliant. These units are not intended for use in potentially hazardous atmospheres in the EU. These units may be CE marked for other Directives of the EU.

W.E. ANDERSON DIV., DWYER INSTRUMENTS, INC.

P.O. BOX 358 • MICHIGAN CITY, INDIANA 46360 U.S. A.

Phone: 219/879-8000 www.dwyer-inst.com Fax: 219/872-9057 e-mail: info@dwyer-inst.com

AXIMUM PRESSURE CHART

FRONT VIEW DETAIL SIDE VIEW DETAIL

CLAMP

SCREW

LOCKWASHER

CONDUCTOR

Model Number

L6EPB-B-S-3-A L6EPB-B-S-3-B

6EPB-B-S-3-C

6EPB-B-S-3-H

6EPB-B-S-3-O

6EPB-S-S-3-A

L L6EPB-S-S-3-C L6EPB-S-S-3-L L6EPB-S-S-3-O

6EPB-S-S-3-S

Float

Cylindrical SS Polypropylene

ound SS

olypropylene

ylindrical SS

C Round SS Round SS Polypropylene

olypropylene

ressure Rating

P psig (kg/cm

200 (13.8) 250 (17.2)

50 (24.1)

50 (17.2)

000 (69)

00 (13.8)

2 350 (24.1) 350 (24.1) 2000 (138)

000 (138)

ETTED MATERIALS CHART

)

Model

B-S-3-A

-S-3-B

-S-3-C

-S-3-H

-S-3-O

B S-S-3-A S-S-3-C S-S-3-L

-S-3-O

-S-3-S

Brass

X X X X X

Bronze

Ceramic

X X X X X X X X X X

Polypropylene

X X

301SS

X X X X X X X X X X

303SS

X X X X

304SS

X X X

INSTALLATION

Unpack switch and remove any packing material found inside lower housing or float

hamber.

witch must be installed with body in a horizontal plane and arrow on side pointing

S down.

If switch has an external float chamber (tee), connect it to vertical sections of 1˝ NPT pipe installed outside vessel walls at appropriate levels. If unit has no external

loat chamber, it must be mounted in a 1˝ NPT half coupling welded to the vessel

all. The coupling must extend through the wall.

Inspect and clean wetted parts at regular intervals.

ELECTRICAL CONNECTIONS

onnect wire leads in accordance with local electrical codes and switch action

equired. N.O. contacts will close and N.C. contacts will open when liquid level

auses float to rise. They will return to “normal” condition on decreasing liquid level.

c Black = common, Blue = N.O. and Red = N.C.

For units supplied with both internal ground and external bonding terminals, the ground screw inside the housing must be used to ground the control. The external bonding screw is for supplementary bonding when allowed or required by local code. When external bonding conductor is required, conductor must be wrapped a minimum of 180° about the external bonding screw. See below. Some CSA listed models are furnished with a separate green ground wire. Such units must be equipped with a junction box, not supplied but available on special order.

Note: ATEX, IECEx and KC units only: The temperature class is determined by the maximum ambient and or process temperature. Units are intended to be used in

mbient of -20°C≤ Tamb ≤75°C. Units may be used in process temperatures up to

05°C providing the enclosure and switch body temperatures do not exceed 75°C.

he standard Temperature Class is T6 Process Temp ≤75°C.

Refer to Certificate No: IECEx DEK 11.0039 for conditions of safe use for IECEx compliant units.

ll wiring, conduit and enclosures must meet applicable codes for hazardous

reas. Conduits and enclosures must be properly sealed. For outdoor or other loca-

ions where temperatures vary widely, precautions should be taken to prevent con-

t densation inside switch or enclosure. Electrical components must be kept dry at all times.

CAUTION: To prevent ignition of hazardous atmospheres, disconnect the device

rom the supply circuit before opening. Keep assembly tightly closed when in use.

AINTENANCE

Inspect and clean wetted parts at regular intervals. The cover should be in place at all times to protect, the internal components from dirt, dust and weather and to maintain hazardous location ratings. Disconnect device from the supply circuit before opening to prevent ignition of hazardous atmosphere. Repairs to be conducted by Dwyer Instruments, Inc. Units in need of repair should be returned to the factory prepaid.

EC-Type Certificate IECEX and KC Installation Instructions: Cable Connection

The cable entry device shall be certified in type of explosion protection flameproof enclosure “d”, suitable for conditions of use and correctly installed. For Ta ≥ 65°C cable and cable gland rated ≥ 90°C shall be used.

Conduit Connection

An Ex d certified sealing device such as a conduit seal with setting compound shall be provided immediately to the entrance of the valve housing. For Ta ≥ 65°C wiring and setting compound, in the conduit seal, rated ≥ 90°C shall be used.

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