BSS Audio BOSS I Series, Instruction Manual

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15
4.2 Extraordinary maintenance
Extraordinary maintenance means to inspect all parts
of the heat exchanger completely.
Natural acid liquid should be used for extraordinary
maintenance, the volume of acid will depend on the
level of fouling.
1. Open the heat exchanger.
2. Remove gaskets from the plates.
3. Remove deposits using a soft brush and running
water.
.4. Rinse with water using a high pressure hose.
Incrustation – Scaling

Calcium carbonate

Calcium sulphate

Silicates
Sediment

Corrosion products

Metal oxides

Silt

Alumina

Diatomic organism and
their excrement of
various colors
Cleaning agent

Nitric acid

Sulfuric acid

Citrix acid

Phosphoric acid

Complex agents (EDTA, NTA)

Sodium polyphosphates
Concentration max 4% and temperature max 60
℃
for the cleaning agents.
Biological growth - Slime

Bacteria

Nematodes

Protozoa
Alkalescent cleaning agent

Sodium hydroxide

Sodium carbonate
Concentration max 4% and temperature max 80
℃
for the cleaning agents.
Note ! Water of more than 330 ppm CI may not be used for the preparation of cleaning solutions.