Boiler house

Level controls

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 2016

2.3.11

Protection tubes

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 then press the test button (or the externally

wired button if fitted) on the LC3000 for 2nd low to ensure

that the burner shuts down at 2nd low level alarm.

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.

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.

Boiler

Not used

2nd low

1st

low

AI-P402-12

AB Issue 8

Typical installation

LCS3000

Level Control Systems

Installation and testing

of self-monitoring low level alarms on/off level controls

Warning: This document does not contain sufficient

information to install the system safely. See the Installation

and Maintenance Instructions supplied with the products

for full details.

LC3050

ALARM

OK

AL

LC3050

controller

LP30

probe

LC1350

OK

LC3050

ALARM

OK

AL

LC3050

controller

LP30

probe

The Spirax Sarco LCS3000 boiler water level control systems

are suitable for automatically controlled steam boilers and provide

the control and alarm functions specified by British Standards in

BS 12953 and by the SAFed and CEA, in consultation with the

Health & Safety Executive, in BG01.

AL

The LCS3000 low level alarms are of the high integrity type and

whilst a trained boiler attendant should check the boiler plant on

weekdays, they need not be on site at all times. There should,

however, always be someone available on site who is suitably

trained to respond to alarms and take appropriate action.

LC1350

controller

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

LC3050 30 μS/cm or 30 ppm

LC1350 Nominal1μS/cm@25°Cminimum

Weekly test

High integrity self-monitoring level controls do not require daily

testing but the weekly 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.

LP10-4

probe

High alarm

Pump off

Pump on

At no time during the test should the water be lowered to the extent

that it disappears from the gauge glass.

We recommend a regular inspection as follows: