Magnetrol T20 Installation And Operating Manual - page 14
14
44-604 Top Mounting Liquid Level Switches
5.2
Agency Approvals
6. Check float to be certain it is buoyant in the liquid (tank
or vessel must have adequate liquid level). If float is deter-
mined to be filled with liquid, or it is collapsed, it must be
replaced immediately. Do not attempt to repair a float.
If all components in the control are in operating condition,
the trouble must be (and should be) located external to the
control. Repeat inspection of external conditions previously
described.
When communicating about your control, be certain to
always specify the complete Model and Serial numbers.
AGENCY
MODEL APPROVED
APPROVAL CLASSES
FM
All with an electric switch mechanism and a housing
Class
I, Div 1, Groups C & D
listed as TYPE 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 TYPE 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 A, 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 TYPE 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 TYPE 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 IIC T6
ATEX housing
➀
94/9/EC
IEC Ex Ex d
IIC T6
IP 66
CE
Low Voltage Directives 2006/95/EC
Installation Category
II
Per Harmonized Standard:
Pollution Degree 2
EN 61010-1/1993 & Amendment No. 1
➀
Dual stage units with ‘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
IIC T6
Tambient -40° C to +70° C