20
46-624 Series 3 Liquid Level Switches ASME B31.1 Construction
AgENCy
APPROvED MODEL
APPROvAL CLASSES
FM
All with an electric switch mechanism and a housing
Class
I
, Div 1, Groups C & D
listed as NEMA 4X/7/9
Class
II
, Div 1, Groups E, F & G
All with an electric switch mechanism and a housing
Class
I
, Div 1, Groups B, C & D
listed as NEMA 4X/7/9 Class
I
, Div 1, Group B
Class
II
, Div 1, Groups E, F & G
CSA
All with a Series HS, F, 8 or 9 electric switch
Class
I
, Div 2, Groups B, C & D
mechanism and a housing listed as CSA TYPE 4X
All with an electric switch mechanism and a housing
Class
I
, Div 1, Groups C & D
listed as NEMA 4X/7/9
Class
II
, Div 1, Groups E, F & G
All with an electric switch mechanism and a housing
Class
I
, Div 1, Groups B, C & D
listed as NEMA 4X/7/9 Class
I
, Div 1, Group B
Class
II
, Div 1, Groups E, F & G
ATEX / IEC Ex
➁
All with an electric switch mechanism and an
ATEX
II
2 G EEx d
II
C T6
ATEX housing
➀
94/9/EC
IEC Ex Ex d
II
C T6
IP 66
CE
All models
Installation Category
II
Pollution Degree 2
Low Voltage Directives
2006/95/EC
per Harmonized Standard
EN 61010-1/1993 & Amendment No. 1
4. Never use lubricants on pivots of switch mechanisms.
A sufficient amount of lubricant has been applied at the
factory to ensure a lifetime of service. Further oiling is
unnecessary and will only tend to attract dust and dirt
which can interfere with mechanism operation.
5.0
Reference Information
5.1
Agency Approvals
➀
Controls with two or more HS switches are not ATEX approved.
➁
IEC Installation Instructions:
The cable entry and closing devices shall be Ex d certified suitable for the conditions of use and correctly installed.
For ambient temperatures above +55° C or for process temperatures above +150° C, suitable heat resistant cables shall be
used.
Heat extensions (between process connection and housing) shall never be insulated.
Special conditions for safe use:
When the equipment is installed in process temperatures higher than +85° C the temperature classification must be reduced
according to the following table as per IEC60079-0.
Maximum Process
Temperature
Temperature
Classification
< 85° C
T6
< 100° C
T5
< 135° C
T4
< 200° C
T3
< 300° C
T2
< 450° C
T1
These units are in conformity with IECEx KEM 05.0020X
Classification Ex d
II
C T6
Tambient -40° C to +70° C