IM-P402-44
AB Issue 15
5
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 Safety information - Product specific for 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 Insurance Bodies.
- Boiler manufacturer’s specifications.
The boiler must be depressurised and vented to atmosphere before installation of
the probe.
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.
Under certain circumstances the water level in a boiler can be different to that shown
in the gauge glass.
Separate literature is available from Spirax Sarco on this subject.
Do not install the probe outdoors without additional weather protection.
Drain / vent holes must be kept clear - do not cover.
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.
1.16 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.
1.17 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.
Summary of Contents for LP30
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