Thermal Solutions EVS SERIES - Water Treatment

19
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 efciency, 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 1 for examples of typical chemical agents found in
untreated water along with their potential effects.
Table 1: Chemical Agents and Effects
Compound Effect
Calcium Carbonate
(CaCO
3
)
Soft Scale
Calcium Bicarbonate
(CaHCO
3
)
Soft Scale, CO
2
Calcium Sulphate (CaSO
4
) Hard Scale
Calcium Choloride (CaCl
2
) Corrosion
Magnesium Carbonate
(MgCO
3
)
Soft Scale
Magnesium Bicarbonate
(MgHCO
3
)
Corrosion, Scale
Magnesium Sulphate
(MgSO
4
)
Corrosion
Silicon Dioxide (SiO
2
) Hard Scale
Since the condition of water varies from location to
location, it is impossible to prescribe a one-size-ts-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 identied, the proper treatment
plan can be established. Therefore, it will be essential to
obtain the expertise of a qualied 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 conrm the proper concentration of chemicals in use.
CAUTION
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 qualied 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.