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BOILER FEED SYSTEM
DATE: 4/3/03
REP:2/1/99
10
6. Considerations of warranty should the boiler system be used for temporary heat
without adherence to the recommended start-up and operating procedures outlined in
the instruction manuals.
3.2 CLEANING THE BOILER AND SYSTEM – NEW SYSTEMS
BOIL OUT PROCEDURE
The internal surfaces of a newly installed boiler will have oil, grease, or other protective coatings
used in manufacturing. Such coatings must be removed since these coatings lower the heat
transfer rate and reduce operating efficiency. The operator must be familiar with the procedure
outlined in the boiler/burner operating instruction manuals.
In combination with system contamination, bacteria may cause objectionable odors, sometimes
resembling natural gas. It is important to keep these fumes from air intake that would distribute
them throughout the building. On steam humidification systems this is especially critical. Consult
your local water treatment chemist for further information. Your water consultant or water
treatment company will be able to recommend a cleaning or boil out procedure.
3.3 SYSTEM CLEAN OUT
Many boilers have been ruined with system contaminants such as pipe dope, cutting oil, metal
shavings or chips, and other debris that are left in the piping.
SYSTEM CLEANING PROCEDURE
For steam systems, the boiler will need to be connected to the header utilizing steam to purge the
piping and thus push the debris out of the system. However, at this time, all condensate must be
wasted until it runs clear and water analysis of the condensate indicates that it is free of
contaminants. Steam trap strainers must be periodically opened and cleaned of any debris that
accumulates.
During this system clean out, the boiler make-up water must be properly softened and treated. At
the conclusion of the system clean out, the condensate must be reconnected.
For existing steam systems, the installation process may have jarred debris loose. Following the
boil out of the new boiler, the condensate should be wasted until it is within proper guidelines.
Check all steam trap strainers to assure their cleanliness.
3.4 REPLACEMENT BOILER INSTALLATIONS: PROTECTION
AGAINST CORROSION & SEDIMENT
CLEAN OR REPLACE ALL SYSTEM PIPING AND HEATING UNITS
Arrange for chemical or mechanical cleaning of the entire system. A chemical treatment company
should be consulted for the proper means of any chemical cleaning.
Replace any piping considered to be deteriorated beyond safe or cleanable condition.
Flush the system clean, being certain to isolate the boiler.
DO NOT FLUSH THE SYSTEM THROUGH THE BOILER.