Water Treatment - Thermal Solutions EVCA SERIES Installation, Operating And Service Instructions

C. WATER TREATMENT
The quality of water used in the heating system is essential
for the successful operation and longevity of the system
components. A successful water treatment plan will help
to maintain efficiency, reduce the regularity of repair and/
or replacement, and extend the working life of the boiler
and other system equipment. If left untreated, poor water
quality could cause a number of problems including, but not
limited to, oxidation, scaling, corrosion, and fouling. See
Table 1A for examples of typical chemical agents found in
untreated water along with their potential effects.
Table 1A: Chemical Agents and Effects
Compound
Calcium Carbonate
(CaCO )
3
Calcium Bicarbonate
(CaHCO )
3
Calcium Sulphate (CaSO
Calcium Chloride (CaCl
Magnesium Carbonate
(MgCO )
3
Magnesium Bicarbonate
(MgHCO )
3
Magnesium Sulphate
(MgSO )
4
Silicon Dioxide (SiO )
2
Since the condition of water varies from location to location,
it is impossible to prescribe a one-size-fits-all treatment plan
for the system water. In order to develop an effective water
treatment plan, it will be necessary to gain knowledge of the
impurities dissolved in the water. Once all the impurities
are identified, the proper treatment plan can be established.
Therefore, it will be essential to obtain the expertise of
a qualified industrial water treatment professional for
establishing a treatment plan.
In addition, a periodic testing/sampling plan should be
developed. The intent of the plan should be to: (1) ensure the
protection of the boiler and system equipment, (2) prevent
an unforeseen system failure, (3) provide information for
use in addressing the water quality, and (4) to confirm the
proper concentration of chemicals in use.
Effect
Soft Scale
Soft Scale, CO
2
) Hard Scale
4
) Corrosion
2
Soft Scale
Corrosion, Scale
Corrosion
Hard Scale
The water shall have a maximum water hardness
of 8.5 grains or 150 ppm. The recommended
pH range is 8.8 to 9.2. However, other aspects
of water quality can affect boiler operation and
longevity. A qualified water treatment expert
should be consulted to develop a complete
water treatment plan.
Oxygen contamination of boiler water will cause
corrosion of iron and steel boiler components,
and can lead to boiler failure. Thermal Solutions
Standard Warranty does not cover problems
caused by oxygen contamination of boiler water.
Proper water treatment and boiler maintenance
is required to avoid scale build-up on the inside
of the boiler. Thermal Solutions Standard
Warranty does not cover problems caused by
scale build-up.
When using Glycol products, all Glycol
manufacturers' requirements, including rust
inhibitors, must be adhered. Max 50% Glycol.
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CAUTION