750-392
CBEX-DE
5-3
Fireside Cleaning
5.2 — Fireside Cleaning
Soot and non-combustibles are effective insulators, and, if allowed to accumulate, will reduce heat transfer to the
water and increase fuel consumption. Soot and other deposits can be very moisture-absorbent, and may attract
moisture to form corrosive acids that will deteriorate fireside metal.
Clean-out should be performed at regular and frequent intervals, depending upon load, type, and quality of
fuel, internal boiler temperature, and combustion efficiency. A stack temperature thermometer can be used
as a guide to clean-out intervals since an accumulation of soot deposits will raise the flue gas temperature.
The flue gas outlet and stack should be inspected annually and cleaned as necessary. Commercial firms are
available to perform the work. The stack should be inspected for damage and repaired as required.
The fireside should be thoroughly cleaned prior to any extended lay-up of the boiler. Depending upon circum-
stances, a protective coating may be required.
5.3 — Water Level Controls
The need to periodically check water level controls and the waterside of the pressure vessel cannot be overem-
phasized. Most instances of major boiler damage are the result of operating with low water, or the use of
untreated (or incorrectly treated) water.
Always be sure of the boiler water level. On steam boilers, the water column should be blown down daily. Check
samples of boiler water and condensate in accordance with procedures recommended by your local Cleaver-
Brooks authorized representative.
Since low-water cutoff devices are generally set by the original manufacturer, no attempt should be made to
adjust these controls to alter the point of low-water cutoff or point of pump cut-in or cut-out. If a low-water
device should become erratic in operation, or if its setting changes from previously established levels, contact
your local Cleaver-Brooks authorized representative.
5.3.1 — Steam Boiler
The standard low water cutoff is the C-B Level Master. Refer to the Level Master manual provided separately for
further information.
The instructions on the low water cutoff plate on a steam boiler should be followed in accordance with a definite
schedule. The controls normally function for long periods of time, which may lead to laxity in testing on the
assumption that normal operation will continue indefinitely.
Safe operation of your boiler demands periodic inspection and maintenance of all low water cut-off
devices. Check operation frequently by stopping water flow to the boiler, allowing water level to
lower. If controls do not cut off burner at proper safe water level or are seen to be in poor physical
condition, repair or replace at once.
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