Spirax Sarco WLS1 User manual

IM-P087-34 MI Issue 6 1
Spiratec WLS1
Waterlogging Sensor Assembly
Installation and Maintenance Instructions
IM-P087-34
MI Issue 6
1150550/6
The WLS1 waterlogging sensor assembly is available in two versions:
1. With a separate diode pack for use with R16C automatic steam trap monitors.
2. Without a diode pack for use with R1C automatic steam trap monitors.
1. Safety information
Safe operation of these products can only be guaranteed if they are properly installed,
commissioned, used and maintained by qualified personnel (see Section 1.11 on this
document) in compliance with the operating instructions. General installation and
safety instructions for pipeline and plant construction, as well as the proper use of
tools and safety equipment must also be complied with.
1.1 Intended use
Referring to the Installation and Maintenance Instructions, name-plate and Technical
Information Sheet, check that the product is suitable for the intended use /application.
The products comply with the requirements of the European Pressure Equipment
Directive 97 / 23 / EC and fall within category 'SEP'. It should be noted that products
within this category are required by the directive not to carry the mark.
i) The products have been specifically designed for use on steam and water, which
are in Group 2 of the above mentioned Pressure Equipment Directive. The products’
use on other fluids may be possible but, if this is contemplated, Spirax Sarco should
be contacted to confirm the suitability of the product for the application being
considered.
ii) Check material suitability, pressure and temperature and their maximum and
minimum values. If the maximum operating limits of the product are lower than
those of the system in which it is being fitted, or if malfunction of the product could
result in a dangerous overpressure or overtemperature occurrence, ensure a safety
device is included in the system to prevent such over-limit situations.
iii) Determine the correct installation situation and direction of fluid flow.
iv) Spirax Sarco products are not intended to withstand external stresses that may be
induced by any system to which they are fitted. It is the responsibility of the installer
to consider these stresses and take adequate precautions to minimise them.
v) Remove protection covers from all connections before installation.
© Copyright 2011
Printed in the UK
Fig. 1
WLS1 waterlogging
sensor assembly

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1.2 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.
1.3 Lighting
Ensure adequate lighting, particularly where detailed or intricate work is required.
1.4 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.
1.5 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.
1.6 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 turned on and off in a
gradual way to avoid system shocks.
1.7 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.
1.8 Temperature
Allow time for temperature to normalise after isolation to avoid danger of burns.
1.9 Tools and consumables
Before starting work ensure that you have suitable tools and/or consumables
available. Use only genuine Spirax Sarco replacement parts.
1.10 Protective clothing
Consider whether you and/or others in the vicinity require any protective clothing to
protect against the hazards of, for example, chemicals, high/low temperature, radiation,
noise, falling objects, and dangers to eyes and face.
1.11 Permits to work
All work must be carried out or be supervised by a suitably competent person.
Installation and operating personnel should be trained in the correct use of the
product according to the Installation and Maintenance Instructions.
Where a formal 'permit to work' system is in force it must be complied with. Where
there is no such system, it is recommended that a responsible person should know
what work is going on and, where necessary, arrange to have an assistant whose
primary responsibility is safety.
Post 'warning notices' if necessary.

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1.12 Handling
Manual handling of large and/or heavy products may present a risk of injury. Lifting,
pushing, pulling, carrying or supporting a load by bodily force can cause injury particularly
to the back. You are advised to assess the risks taking into account the task, the
individual, the load and the working environment and use the appropriate handling
method depending on the circumstances of the work being done.
1.13 Residual hazards
In normal use the external surface of the product may be very hot. If used at the
maximum permitted operating conditions the surface temperature of some products
may reach temperatures of 350°C (662°F).
Many products are not self-draining. Take due care when dismantling or removing
the product from an installation (refer to 'Maintenance instructions').
1.14 Freezing
Provision must be made to protect products which are not self-draining against frost
damage in environments where they may be exposed to temperatures below freezing
point.
1.15 Disposal
Unless otherwise stated in the Installation and Maintenance Instructions, this product
is recyclable and no ecological hazard is anticipated with its disposal providing due
care is taken.
1.16 Returning products
Customers and stockists are reminded that under EC Health, Safety and Environment
Law, when returning products to Spirax Sarco they must provide information on any
hazards and the precautions to be taken due to contamination residues or mechanical
damage which may present a health, safety or environmental risk. This information
must be provided in writing including Health and Safety data sheets relating to any
substances identified as hazardous or potentially hazardous.

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2. Installation
2.1 Install the WLS1 sensor and cable assembly into the Spiratec sensor chamber or
steam trap taking care not to damage the cable.
Tighten to a torque of 50 - 56 N m (37 - 42 lbf ft) using a 24 mm A/F spanner.
2.2 For applications using an R16C automatic steam trap monitor, use the diode pack to
connect the 3 core sensor cable to the 2 core cable (customer supply) to the R16C as
shown. The diode pack may be located within a junction box if required.
Maximum recommended distance between the WLS1 sensor and the R16C is
500 m (1 640 ft). Take care to observe correct polarity when connecting wires to R16C.
2.3 For applications using an R1C steam trap failure monitor, the diode pack is not
required. Maximum recommended distance between the WLS1 sensor and the R1C
is 10 m (32 ft). Take care to observe correct polarity when connecting wires to R1C.
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To WLS1 sensor
To R16C (500 m / 1 640 ft) maximum
Fig. 2 WLS1 diode pack