Float Switch Model L6 Specifications - Installation and Operating Instructions Bulletin E-20

Float Switch Model L6 Specifications - Installation and Operating Instructions Bulletin E-20
Bulletin E-20
Model L6
Float Switch
Specifications - Installation and Operating Instructions
Explosion-Proof; UL and CSA Listed Class I, Groups *A, B, C, & D
Class II, Groups E, F & G
Directive 94/9/EC (ATEX) Compliant for
II 2 G Ex d IIC T6 Gb Process Temp≤75°C
IECEx Compliant for Ex d IIC T6 Gb Process Temp≤75°C
*(Group A, stainless steel body only)
Example
L6 EP B B S 3 B MT
Series
L6
Construction
EP
Upper
B
Body Material
S
Lower
B
Body Material
S
Circuit (Switch)
S
Type
D
Line Size
3
Tee and Float
0
Options
A
B
C
H
L
S
Switch Options
MV
MT
Options
AT
CSA
IEC
KC
GL
ID
TBC
TOP
SPECIFICATIONS
Service: Liquids compatible with
wetted materials.
Wetted Materials: Float: Solid
polypropylene or 304 SS; Lower Body:
Brass or 303 SS; Magnet: Ceramic;
External Float Chamber (Tee):
Matches lower body choice of brass or
303 SS; Other: Lever Arm, Spring,
Pin, etc.: 301 SS.
Temperature Limit: -4 to 220°F (-20
to 105°C) Standard, MT high
temperature 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) process
temperature: -4 to 220°F (-20 to
105°C).
Pressure Limits: See next page.
Enclosure Rating: Weatherproof and
Explosion-proof. Listed with UL and
CSA for Class I, Groups A, B, C and
D; Class II, Groups E, F, and G.
(Group A on stainless steel body
models only).
II 2 G Ex d IIC T6 Gb
0518
Process Temp≤75°C.
EC-Type Certificate No.: KEMA
04ATEX2128.
ATEX Standards: EN 60079-0: 2009;
EN60079-1: 2007.
IECEx Certified: For Ex d IIC T6 Gb
Process Temp≤ 75°C.
IECEx Certificate of Conformity:
IECEx DEK II.0039.
IECEx Standards: IEC 60079-00:
2007; IEC 60079-1: 2007.
Korean Certified (KC) for Ex d IIC T6
Gb Process Temp≤75°C.
KTL Certificate Number: 2012-245475.
Switch Type: SPDT snap switch
standard, DPDT snap switch optional.
Electrical Rating: UL models: 5 A @
125/250 VAC (V~). CSA, ATEX and
IECEx models: 5 A @ 125/250 VAC
(V~); 5A res., 3 A ind. @ 30 VDC (V ).
MV option: 0.1 A @ 125 VAC (V~). MT
option: 5 A @125/250 VAC (V~). [MT
option not UL, CSA, ATEX or IECEx].
Electrical Connections: UL models:
18 AWG, 18˝ (460 mm) long.
ATEX/CSA/IECEx models: terminal
block.
Upper Body: Brass or 303 SS.
Conduit Connection: 3/4˝ male NPT
standard, 3/4˝ female NPT on junction
box models.
Process Connection: 1˝ male NPT
on models without external float
chamber, 1˝ female NPT on models
with external float chamber.
Mounting Orientation: Horizontal
with index arrow pointing down.
Weight: Approximately 1 lb (.5 kg)
without external float chamber, 1.75 lb
(.8 kg) with external float chamber.
Specific Gravity: See next page.
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
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
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.
* Options that do not have ATEX, IECEx or KC.
W.E. ANDERSON DIV., DWYER INSTRUMENTS, INC.
P.O. BOX 358 • MICHIGAN CITY, INDIANA 46360 U.S.A.
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: [email protected]
MAXIMUM PRESSURE CHART
Model Number
L6EPB-B-S-3-A
L6EPB-B-S-3-B
L6EPB-B-S-3-C
L6EPB-B-S-3-H
L6EPB-B-S-3-O
L6EPB-S-S-3-A
L6EPB-S-S-3-C
L6EPB-S-S-3-L
L6EPB-S-S-3-O
L6EPB-S-S-3-S
Float
Cylindrical SS
Polypropylene
Round SS
Round SS
Polypropylene
Cylindrical SS
Round SS
Round SS
Polypropylene
Polypropylene
WETTED MATERIALS CHART
Pressure Rating
psig (kg/cm2)
200 (13.8)
250 (17.2)
350 (24.1)
250 (17.2)
1000 (69)
200 (13.8)
350 (24.1)
350 (24.1)
2000 (138)
2000 (138)
Model
B-S-3-A
B-S-3-B
B-S-3-C
B-S-3-H
B-S-3-O
S-S-3-A
S-S-3-C
S-S-3-L
S-S-3-O
S-S-3-S
INSTALLATION
Unpack switch and remove any packing material found inside lower housing or float
chamber.
Switch must be installed with body in a horizontal plane and arrow on side pointing
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
float chamber, it must be mounted in a 1˝ NPT half coupling welded to the vessel
wall. The coupling must extend through the wall.
Inspect and clean wetted parts at regular intervals.
ELECTRICAL CONNECTIONS
Connect wire leads in accordance with local electrical codes and switch action
required. N.O. contacts will close and N.C. contacts will open when liquid level
causes float to rise. They will return to “normal” condition on decreasing liquid level.
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.
LOCKWASHER
CONDUCTOR
SCREW
CLAMP
FRONT VIEW DETAIL
SIDE VIEW DETAIL
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.
Brass Bronze Ceramic
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Polypropylene 301SS
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
303SS 304SS
X
X
X
X
X
X
X
X
X
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
ambient of -20°C≤ Tamb ≤75°C. Units may be used in process temperatures up to
105°C providing the enclosure and switch body temperatures do not exceed 75°C.
The 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.
All wiring, conduit and enclosures must meet applicable codes for hazardous
areas. Conduits and enclosures must be properly sealed. For outdoor or other
locations where temperatures vary widely, precautions should be taken to prevent
condensation inside switch or enclosure. Electrical components must be kept dry
at all times.
CAUTION: To prevent ignition of hazardous atmospheres, disconnect the device
from the supply circuit before opening. Keep assembly tightly closed when in use.
MAINTENANCE
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.
MODEL L-6 FLOAT SWITCH — DIMENSION DRAWINGS
Ø1 [25.40]
1 MALE NPT
Ø1-1/16
[26.99]
3/4
[19.05]
1-3/4
[44.45]
Ø1
[Ø25.40]
FLOAT
3/4 MALE NPT
CONDUIT
CONNECTION
3/4 MALE
NPT CONDUIT
CONNECTION
1 MALE NPT
Ø1-1/16
[Ø26.99]
1-1/16
[26.99]
6
[152.40]
1-27/32
[46.83]
6-1/2
[165.10]
Round Stainless Steel Float
Polypropylene Float
1 FEMALE NPT
TYP 2 PLACES
Ø1 [25.40] x 2 [50.80]
LONG FLOAT
1 MALE NPT
3/4 MALE NPT CONDUIT
CONNECTION
3/4 MALE NPT
CONDUIT
CONNECTION
3-5/64
[78.18]
Ø1-1/16
[26.99]
2-7/8
[73.03]
1-1/16
[26.99]
1-9/64
[28.97]
Ø1-1/16
[26.99]
2 [50.80]
HEX
6-1/2
[165.10]
8-9/16
[217.49]
Cylindrical Stainless Steel Float
With External Chamber (Tee)
SPDT
DPDT
Terminal Connections CSA, ATEX Enclosures
Ø3-11/32
[84.93]
Ø3-3/8
[85.73]
3/4 FEMALE NPT
CONDUIT CONNECTION
TYP 2 PLACES
3-1/2
[88.90]
4-3/8
[111.13]
2-15/16
[74.63]
4-1/4 [107.95]
CLEARANCE FOR
COVER REMOVAL
CSA, ATEX Conduit Enclosure
25/32
[19.86]
Limited Warranty: The Seller warrants all Dwyer instruments and equipment to be
free from defects in workmanship or material under normal use and service for a
period of one year from date of shipment. Liability under this warranty is limited to
repair or replacement F.O.B. factory of any parts which prove to be defective within
that time or repayment of the purchase price at the Seller’s option provided the
instruments have been returned, transportation prepaid, within one year from the date
of purchase. All technical advice, recommendations and services are based on
technical data and information which the Seller believes to be reliable and are
intended for use by persons having skill and knowledge of the business, at their own
discretion. In no case is Seller liable beyond replacement of equipment F.O.B. factory
or the full purchase price. This warranty does not apply if the maximum ratings label
is removed or if the instrument or equipment is abused, altered, used at ratings above
the maximum specified, or otherwise misused in any way.
Buyers Remedies: THE BUYER’S EXCLUSIVE AND SOLE REMEDY ON
ACCOUNT OF OR IN RESPECT TO THE FURNISHING OF NON-CONFORMING
OR DEFECTIVE MATERIAL SHALL BE TO SECURE REPLACEMENT THEREOF
AS AFORESAID. THE SELLER SHALL NOT IN ANY EVENT BE LIABLE FOR THE
COST OF ANY LABOR EXPENDED ON ANY SUCH MATERIAL OR FORM ANY
SPECIAL, DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES TO ANYONE BY
REASON OF THE FACT THAT IT SHALL HAVE BEEN NON-CONFORMING OR
DEFECTIVE.
THIS EXPRESS LIMITED WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER
REPRESENTATIONS MADE BY ADVERTISEMENTS OR BY AGENTS AND ALL
OTHER WARRANTIES, BOTH EXPRESS AND IMPLIED. THERE ARE NO IMPLIED
WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR
PURPOSE FOR GOODS COVERED HEREUNDER.
©Copyright 2015 Dwyer Instruments, Inc.
Printed in U.S.A. 12/15
W.E. ANDERSON DIV., DWYER INSTRUMENTS, INC.
P.O. BOX 358 • MICHIGAN CITY, INDIANA 46360 U.S.A.
Phone: 219/879-8000
Fax: 219/872-9057
FR# 440726-00 Rev. 15
www.dwyer-inst.com
e-mail: [email protected]
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