Installation Manual

ValveWatch II Hardware Installation and Setup Manual
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CRANE
Nuclear
3 Installing the System
Installing the ValveWatch II System involves multiple steps. Perform the following installation
tasks in their entirety, in the order that is appropriate for your installation.
3.1 General Intrinsic Safety Requirements
The following list is based on general guidelines followed for installation in an explosive area. This is
only a guideline and all site specific installation requirements shall be followed.
A. Installations should provide ease of access for inspection and maintenance.
B. Locate equipment in the least hazardous area practicable.
C. Review all system documentation prior to installation.
D. Verify use of certified equipment for hazardous area conditions.
E. Route cables to minimize risk of mechanical damage.
F. Seal unused cable entry holes with qualified blanking plugs.
G. Wall openings for cable routing between hazardous and non-hazardous areas shall be properly
sealed.
H. Conductor splicing should be avoided but, if required, shall be accomplished in approved
enclosures.
I. Stranded conductors shall be protected against separation by appropriate lugs.
J. Unused conductors shall be insulated from earth and other conductors by approved insulators on
both ends.
K. Sensors, components or cables shall not be installed or routed where ambient temperatures will
exceed rated values.
L. Cables and conduits shall meet national requirements.
M. Intrinsically safe circuits shall remain separated from non-intrinsically safe circuits.
N. Individual conductors (including individual strands of multi-stranded conductors) shall be greater
than 0.1 mm diameter.
O. Cable test voltages shall be greater than 500 VAC.
P. Cable screens shall be connected to earth on only one end.
Q. Cables containing intrinsically safe circuits shall be light blue in color.
R. Cabinet wiring for intrinsically safe circuits shall maintain a 2 in separation between intrinsically
safe and non-intrinsically conductors unless other appropriate separation is provided.
S. Intrinsically safe circuits shall be blue color or adequately marked.
T. Exposed bare conductors of intrinsically safe circuits shall maintain 3 mm spacing from any metal
(earthed) parts.
Caution:
This document is considered a “Scheduled Drawing” document. No modifications are permitted
without reference to the Notified Body.
Caution:
If the system is used in a manner not specified by the manufacturer, any protection provided by
the manufacturer may be impaired.