Boiler house Level controls
2
Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2021
AI-P693-35 EMM Issue 1
LCSR1100 Level Control Systems
Installation and testing of on/off boiler water level controls direct mounted in the boiler
2.3 7
Typical installation Warning: This document does not contain sufficient information to install the system safely. See the Installation and Maintenance Instructions supplied with the individual products for full details. The Spirax Sarco LCSR1100 boiler water level control systems are suitable for automatically controlled steam boilers and provide the control and alarm functions specified by HSE/CEA/ SAFed Guidance BG01 arrangement 1. The LCSR1100 series systems require daily manual testing as specified in BG01 and a competent boiler operator should be on site at all times the boiler is in operation. The level controls and level alarms are probably the most important controls on the boiler for ensuring safety and should only be installed and maintained by suitably trained personnel. Spirax Sarco can install, commission and provide a regular maintenance service. Minimum conductivity Nominal 1 µS/cm @ 25°C minimum Daily test
The test should be carried out or witnessed by a responsible person who appreciates the hazards involved and has been suitably trained in the safe operation of the boiler and its controls. At no time during the test should the water be lowered to the extent that it disappears from the gauge glass. 1. With the feedpump switched off, allow the water level to fall by evaporation until the burner shuts down at 1st low alarm. 2. Blow down the boiler until the 2nd low alarm sounds and the burner controls go to lockout. 3. Raise the water level to normal, reset the lockout and allow the burner to refire. 4. Under hand control raise the water level to the high alarm level. Check that the high alarm sounds. 5. Return all valves and controls to normal and monitor the boiler until satisfied that it is operating normally. Quarterly inspection The Health and Safety Executive recommend from experience that the boiler controls should be serviced at least at quarterly intervals. Where the regular tests are carried out properly in a well run boiler house with good water treatment, it may be that only an annual inspection of the probes etc. is required. This is a matter, however, for the user to decide in liaison with his insurance company inspector in order to determine a sensible inspection programme to suit the individual boiler plant. We recommend a regular inspection as follows: 1. Inspect the probe plugs for moisture. 2. Unscrew the probes and wipe away any dirt from the probe tips. If any hard scale is present it may be an indication of more serious scale formation elsewhere in the boiler. Investigate water treatment. 3. Inspect the wiring and controllers for damage. 4. Reassemble and carry out a full functional check.
LCS1350 controller
LCS1350 controller
LP11-4 probe
LP11-4 probe
Boiler
Not used
Not used
Protection tubes
Pump off High alarm
Pump on
1st Low 2nd Low
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