2 IM-P402-37 AB Issue 9
1. Safety information
Safe operation of the product depends on it being properly installed, commissioned
and maintained by a qualified person (see Section 1.11) 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 the marking, and may cause
injury or fatality to personnel.
Additional Safety Notes
Level control and level limiting / alarm products in steam boilers
Products / systems must be selected, installed, operated, and tested in accordance with:
- Local or National standards and regulations.
- Guidance Notes, (Health and Safety Executive BG01 and INDG436 in the UK).
- The requirements of Approvals Authorities.
- Boiler inspection bodies.
- Boiler manufacturer’s specifications.
Two independent low water limiting / alarm 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 / alarms require regular functional testing.
A suitable water treatment regime must be used to ensure continuous safe and
correct operation of the control and limiter / alarm systems. Consult the above
authorities and a competent water treatment company.
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