IM-P402-72 AB Issue 6
2
1. General safety information
Your attention is drawn to the Safety Information leaflet, IM-GCM-10, as well as to any
National or local regulations.
Safe operation of the product depends on it being properly installed, commissioned
and maintained by a qualified person in compliance with the operating instructions.
It is essential to comply with general installation and safety instructions for pipeline
and plant construction, as well as to make proper use of tools and safety equipment.
The product is designed and constructed to withstand the forces encountered
during normal use. Use of the product for any other purpose, or failure to install the
product in accordance with these Installation and Maintenance Instructions, could cause
damage to the product, will invalidate any marking, and may cause injury or fatality
to personnel.
Additional Safety Notes:
Level control and level limiting products in steam boilers
Products / systems must be selected, installed, operated, and tested in accordance with:
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Local or National standards and regulations.
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Guidance Notes, (Health and Safety Executive PM5 in the UK).
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The requirements of Approvals Authorities.
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Boiler Inspection Bodies.
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Boiler manufacturer’s specifications.
Two independent low water limiting systems must be installed on steam boilers.
Level probes must be installed in separate protection tubes / chambers, with
sufficient clearance between the tips, and earth.
Each probe must be connected to an independent controller. The alarm relays
must isolate the boiler heat supply at low alarm status.
A high water alarm may be part of the water level control, or a separate system. An
independent high water alarm system must be fitted if it is considered a safety requirement.
In this case, the relays must simultaneously isolate the feedwater supply and the boiler heat
supply at high alarm status. All boiler water limiters require regular functional testing.
The level probe and controller is only part of the safety system. To complete the
system, additional circuitry (wiring, relays, alarm bell / lamp etc.) is required. Circuitry
must be designed and wired to 'fail-safe'.
A suitable water treatment regime must be used to ensure continuous safe and correct
operation of the control and limiter systems. Consult the above authorities and a
competent water treatment company.
Warning
Isolate the mains supply before unplugging the controller since hazardous voltages will
be exposed on the controller base. This product complies with the requirements
of Electromagnetic Compatibility Directive 89 / 336 / EEC by meeting the standards of:
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Emissions EN 61326: 1997 A1 + A2 Class B equipment Table 4.
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Immunity
EN 61326: 1997 A1 + A2 Class A equipment Table 1.
The following conditions should be avoided as they may create interference above
the limits specified in EN 61326 (Immunity) if:
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The product or its wiring is located near a radio transmitter.
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Excessive electrical noise occurs on the mains supply. Power line protectors (ac)
should be installed if mains supply noise is likely. Protectors can combine filtering,
suppression, surge and spike arrestors.
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Cellular telephones and mobile radios may cause interference if used within
approximately 1 metre (39") of the product or its wiring. The actual separation distance
necessary will vary according to the surroundings of the installation and the power
of the transmitter.
If this product is not used in the manner specified by this IMI, then the protection
provided may be impaired.
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