Installation, Operation, & Maintenance Instructions
IOM JS500.03
2016.04
Vertical Float Switches
Installation Instructions Specific to Hazardous Area
Examples of Model Numbers Covered:
Model Number - Part 1, page 4 : JBC1FSA7
F
1X410X (“
F
” indicates FM approval for hazardous locations.)
Model Number - Parts 2 & 3, page 5: S24867-JS
#
or JSCKIT-C
#
J
#
X4 (“#”, when represented by “
7
”, “
I
”, or “
R
”, indicates
FM approval for hazardous locations.)
The following instructions apply to equipment covered by FM File
3058469
Installation of this equipment shall be carried out by suitably trained personnel, in accordance with all local and national
codes.
1.
Inspection and maintenance of this equipment shall be carried out by suitably trained personnel, in accordance with all
local and national codes.
2.
No maintenance or repair of the flameproof enclosure is permitted.
3.
The enclosure must not be opened when the equipment is electrically energized. Where Line Monitoring Resistors are
fitted allow four minutes after isolation before removing cover.
4.
The certification of this equipment relies upon the following materials used in its construction:
a.
Housing and Cover: Aluminum Alloy LM25 or LM24 or B85 grade 360, or Cast Iron grade 250.
b.
Pressure Tube & Union (Partition wall): Stainless Steel types 316, 321 or 304, or Carbon Steel 220M07 or
ASTM A108, or Alloy NA18, or Alloy C-276 (UNS N10276) or Alloy 625 (UNS N06625), or Alloy 825 (UNS
N08825)
i.
If the equipment is likely to come into contact with aggressive substances, it is the responsibility of
the user to take suitable precautions that prevent it from being adversely affected, thus ensuring that
the type of protection is not compromised.
ii.
Aggressive substances: e.g. acidic liquids or gases that may attack metals or solvents that may affect
polymeric materials.
iii.
Suitable precautions: e.g. regular checks as part of routine inspections or establishing from the
material’s data sheet that it is resistant to specific chemicals.
iv.
Note:
The metallic alloy used for the enclosure material may be at the accessible surface of this
equipment; in the event of rare accidents, ignition sources due to impact and friction sparks could
occur.
5.
It is the responsibility of the user to ensure:
a.
The voltage and current limits for this equipment are not exceeded.
b.
That only suitably certified cable entry devices will be utilized when connecting this equipment.
c.
That suitable temperature rated cable is used.
Note:
The cable entry temperature may exceed 70°C.
d.
That any unused cable entries are sealed with suitably certified stopping plugs.
e.
The joint requirements between the switch housing and vessel are compatible with the process media.
f.
The joint tightness is correct for the joint material used.
g.
The float is protected from impact or friction, or electrostatic charging from fast flowing non-conductive fluids,
that could generate an ignition source.
6.
Except for input gland, only screws and fittings provided by the manufacturer can be attached to the housing.
7.
Technical data:
a.
Coding: FM approval: Class I Div. 1 Groups B,C,D T6...T1 (-50°C
≤
Ta
≤
+60°C)
b.
Pressure: Must not exceed the rating of the coupling/flange fitted.
c.
Temperature:
i.
Ambient Air Temperature (Ta) (-50°C
≤
Ta
≤
+60°C)
ii.
Allowable process temperature (Tp)
d.
FM Approval Standards: FM Class 3600:2011,
FM Class 3615:2006, FM Class 3616:2011,
FM Class 3810:2005.
The
Temperature
Class
applicable
for
each
application
is
determined
by
the
process
temperature
(Tp)
as
shown
in
the
table
above.
T
Class
Process
Temperature
(Tp)
T6
‐
50°C TO
80°C
T5
‐
50°C TO
95°C
T4
‐
50°C TO
130°C
T3
‐
50°C TO
195°C
T2
‐
50°C TO
295°C
T1
‐
50°C TO
455°C
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●
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