Electrical Connections - Dwyer Instruments L6 Flotect Serie Instrucciones De Instalación Y Funcionamiento

MODEL CHART
Example L6 EP -BB -D -3 -0 -CSA -B0HB
Series L6
Construction EP
Body BB
SS
Switch Type D
Process S
Connection
Float
Type and
Installation
Options
Bushing/
Tees and
Bushings*
*Options that do not have ATEX, IECEx or KC.
**BSPT options not compatible with KC option.
Attention: Units without the "AT" suffix are not Directive 2014/34/EU (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.
MAXIMUM PRESSURE CHART
Model Float
L6EPB-B-S-3-A Cylindrical SS
L6EPB-B-S-3-B Polypropylene
L6EPB-B-S-3-C Round SS
L6EPB-B-S-3-H
Round SS
L6EPB-B-S-3-O Polypropylene
L6EPB-S-S-3-A Cylindrical SS
L6EPB-S-S-3-C Round SS
L6EPB-S-S-3-L Round SS
L6EPB-S-S-3-O Polypropylene
L6EPB-S-S-3-S Polypropylene
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.
L6EPB-B-D-3-0-CSA-B0HB
Flotect
®
Explosion proof
Brass
Stainless steel
DPDT
SPDT
3 1˝ NPT
4 1˝ BSPT, M25 x 1.5 conduit connection**
0 Spherical polproplene, side wall mount*
A Cylindrical 304 SS, side wall mount
B Spherical Polypropylene, brass external float chamber*
C Spherical 304 SS, side wall mount
H Spherical 304 SS, brass external float chamber
L Spherical 304 SS, 304 SS external float chamber
S Spherical polypropylene, 304 SS external float chamber*
AT ATEX approval
CSA CSA approval*
GL Ground leads*
IEC IECEx approval
KC Korean certified*
MT High temperature*
MV Gold contacts
ST Stainless steel tag
TBC Terminal block connector
TOP Top mounted float*
B0HB 1-1/2˝ NPT hex type brass bushing
B0H4 1-1/2˝ NPT hex type 304 SS bushing
B1HB 2˝ NPT hex type brass bushing
B1H4 2˝ NPT hex type 304 SS bushing
TB2BS 2˝ NPT Brass 250# tee and bushing
TB2S 2˝ NPT 316 SS ree and bushing
B0HBE 1-1/2˝ BSPT hex type brass bushing**
B0H4E 1-1/2˝ BSPT hex type 304 SS bushing**
B1HBE 2˝ BSPT hex type brass bushing**
B1H4E 2˝ BSPT hex type 304 SS bushing**
TB2BSE 2˝ BSPT brass 250# tee and bushing**
TB2SE 2˝ BSPT 316 SS tee and bushing**
Pressure Rating psig
(kg/cm )
2
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)
liquid level switch
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.
EU-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.
LOCKWASHER
SCREW
CLAMP
FRONT VIEW DETAIL
CONDUCTOR
SIDE VIEW DETAIL