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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7.7.6 Boiler Compounds – Commercial boiler compounds are, for the most part,
mixtures of the chemicals described in the above part. They may be either solid or
liquid. The latter are solutions of the chemicals and blow-down, or loss of condensate;
additional treatment will be necessary from time to time. A number of different types
may be employed. These include open-type gravity feeders where the treatment is
to be fed manually in one slug or in periodic small shots; closed-type gravity-drip and
bypass feeders where the treatment is to be fed in proportion to the amount of makeup
water; and pot type proportional feeders where slowly dissolving treatment crystals or
briquettes are used.
7.8 Water Treatment Procedure
7.8.1 Determination of Water containing Capacity – Determine the water containing
capacity of the Boiler so instructions can be given regarding the required amount of
boiler water treatment compound. If this information is not given on the Boiler, in the
Boiler catalog, or other publications, then meter the water at the time of the initial filling
and record the information. Easco records this information on the System MB drawing
found on the submittal and record prints and in Burner Service Manual.
7.8.2 Making a pH or Alkalinity Test – The condition of the boiler water can be quickly
tested with hydrion paper which is used in the same manner as litmus paper, except it
gives specific readings. A color chart on the side of the small hydroid dispenser gives the
reading in pH. Hydroid paper is inexpensive and obtainable from any chemical supply
house or through your local druggist. If a more precise measurement of pH is desired, a
color slide comparator kit is recommended.
7.8.3 Mixing and Handling Chemicals – The chemicals, if liquid, should be diluted; or
if solid, dissolved in accordance with the supplier’s directions before adding them to
the system. If the treatment is a solid, make sure it is fully dissolved. A simple hand
paddle to stir the solution is frequently all that is necessary. If the chemicals are slow
to dissolve, a steam line for heating the water and agitating the mixture may be used
to accelerate solution. The use of compressed air for this purpose is undesirable since
additional oxygen will be introduced, which will neutralize reducing agents such as
sodium sulphite. Since the treatment chemicals may be highly alkaline or skin irritating,
it is advisable to wear goggles and gloves when they are being handled and mixed.
CAUTION!
Do not permit the dry material or the concentrated solution to come in
contact with skin, eyes or clothing.
7.8.4 Treatment of Laid-up Boilers – When steel Boilers are out of service for any
length of time, such as a lay-up for the summer, they must be protected from corrosion.
This may be done either by draining them and keeping the surfaces thoroughly dry or by
completely filling the Boiler with properly treated water.
Dry Method – The Boiler is drained, flushed, and inspected. The surfaces are then
thoroughly dried by means of hot air. If the boiler room is dry and well ventilated, the
Boiler may be left open to the atmosphere.
