Spirax Sarco SP7-20 - General Safety Precautions; Wiring and Grounding Safety; Intended Use and Access; Hazardous Environment Considerations

IM-P706-03 CTLS Issue 1
5
SP7-20 Smart Positioner
1.2 Wiring
Every effort has been made during the design of the positioner to ensure the safety of the user,
but the following precautions must be followed:
i) Ensure correct installation. Safety may be compromised if the installation of the product is
not carried out as specified in this manual.
ii) Wiring should be carried out in accordance with IEC 60364 or equivalent.
iii) Fuses should not be installed in the protective earth conductor. The integrity of the installation
protective earth system must not be compromised by the disconnection or removal of other
equipment.
1.3 Intended use
Referring to the Installation and Maintenance Instructions, product markings and Technical
Information Sheet, check that the product is suitable for the intended use / application.
1.4 Access
Ensure safe access and if necessary a safe working platform (suitably guarded)before attempting
to work on the product. Arrange suitable lifting gear if required.
1.5 Lighting
Ensure adequate lighting, particularly where detailed or intricate work is required.
1.6 Hazardous liquids or gases in the pipeline
Consider what is in the pipeline or what may have been in the pipeline at some previous time.
Consider: flammable materials, substances hazardous to health, extremes of temperature.
1.7 Hazardous environment around the product
Consider: explosion risk areas, lack of oxygen (e.g. tanks, pits), dangerous gases, extremes of
temperature, hot surfaces, fire hazard (e.g. during welding), excessive noise, moving machinery.
The positioner is suitable for installation in Zone 1 or Zone 2 ( Gas ). The positioner shall not
be used in zone 0.
1.8 The system
Consider the effect on the complete system of the work proposed. Will any proposed action (e.g.
closing isolation valves, electrical isolation) put any other part of the system or any personnel
at risk?
Dangers might include isolation of vents or protective devices or the rendering ineffective of
controls or alarms. Ensure isolation valves are opened and closed progressively to avoid system
shocks.
1.9 Pressure systems
Ensure that any pressure is isolated and safely vented to atmospheric pressure. Consider double
isolation (double block and bleed) and the locking or labelling of closed valves. Do not assume
that the system has depressurised even when the pressure gauge indicates zero.
1.10 Temperature
Allow time for temperature to normalise after isolation to avoid the danger of burns.