INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Easco Boiler Corp 1175 Leggett Ave Bronx, NY 1047 T: 718.378.3000 F: 718.378.4560 [email protected] easco.com
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SECTION 7: WATER TREATMENT
NOTE:
The information contained in this section is general in nature. The specific treatment
program for your Boiler should be dictated by local conditions. Easco Boiler Corp. will not be
held responsible for owner’s failure to exercise sound engineering practices with regards to
proper water treatment that results in premature failures of boiler components.
7.1 Boiler Water Treatment Considerations
Consult with a local water treatment company regularly engaged in the treatment
of boiler water for advice on maintaining the proper feed-water, boiler water, and
condense chemistry.
NOTE
Certain State and local codes may restrict the use of some of the chemicals
listed for cleaning and maintaining the Boiler. Check with local authorities before
proceeding to use any chemicals.
Boiler water treatment will help maximize the effectiveness and prolong the life of
pressure vessels. The general objectives of boiler water treatment are:
1) Remove corrosive gases from feed-water and boiler water.
2) Prevent sludge and scale deposits on the waterside heating surfaces.
3) Prevent foaming and carryover.
7.2 Make pH or Alkalinity Test
After Boiler and system have been cleaned and refilled as previously described, test
the pH of the water in the system. This can easily be done by drawing a small sample of
boiler water and testing with hydroid paper which is used in the same manner as litmus
paper, except it gives specific readings. A small color chart on the side of the hydroid
dispenser gives the reading in pH. Hydroid paper is expensive and obtainable from any
chemical supply house or through your local druggist. The pH should be higher than 7,
but lower than 11. Add some of the washout chemical (caustic soda), if necessary, to
bring the pH within the specified range.
IMPORTANT:
If, during normal operation, it is necessary to add water to this Boiler more
frequently than once a month consult a qualified service technician to check your system
for leaks. A leaky system will increase the volume of make-up water are dissolved minerals
and oxygen. When the fresh, cool makeup water is heated in the Boiler the minerals fall out
as sediment and the oxygen escapes as a gas. Both can result in reduced boiler life.
Problems caused by oxygen and mineral contamination of boiler water are not covered
by EASCO’s standard warranty. Therefore, it is in everyone’s best interest to prevent this
type of failure. The maintenance of system integrity is the best method to achieve this.
In deciding what type of treatment to use, the following factors should be considered:
•
The type of Boiler, i.e., steam or hot water.
•
The nature of the raw water, i.e., hard or soft, corrosive or scale forming.
•
Preliminary treatment of the water, i.e., softeners, pre-heaters, deaerators.
