Chemical and Physical Treatments, what to do

C

Low temperature system

new or existing

Regarding the sanitary system (better described in

paragraph 5), we must take care to differentiate the

washing treatment in two main categories, that is

the scaling of the exchanger and the healing of the

entire sanitary circuit.

In the first case, on copper or steel exchangers, we

will use the descaling DISINEx in order to remo-

ve calcareous incrustations from the heat exchan-

ger, (while for exchangers in aluminum-silicon is

recommended the use of ZINCONEx-LQ), taking

care to dilute the product in the ratio of 10 - 20 %

with mains water, reducing the contact time of 1 - 2

hours, the time required to dissolve the limestone

from the metal surface of the heat exchanger; once

effervescence occurred and the color change from

yellow to pink -purple , add again a small amount of

the scale remover in order to ensure that the pro-

duct is not exhausted and that descaling is comple-

ted successfully.

Once the treatment is done, it is a good thing to

perform backwashing with the neutralizing residual

acidity NEUTRAL in ratio of 3 - 5 % of the circula-

ting liquid and letting it work for at least a couple of

hours.

In case it becomes necessary to restore the entire

sanitary circuit, we are going to perform a pickling

plant adding ZINCONEx powder in ratio of 3 - 5 %

compared to the total circulating liquid and leaving

it circulate for at least a couple of hours. As in the

previous case, it is always a good thing to perform

backwashing with the residual acidity neutralizing

agent NEUTRAL in ratio of 3 - 5 % of the circulating

liquid leaving it into the circuit for a couple of hours.

The next tip is to protect the system by make it circu-

late for at least 12 - 24 hours creating a recirculation

of the system by making FILMAx-SAN cirulate by a

ratio of 1.5 - 2 % of the total liquid. Then drain the

circuit and make a good backwashing with water.

Radiant floor thermography with evident Biofouling (algae)

5 Sterilization

(or sanification) and

passivation of a

low temperature thermal

system, e.g. radiant panels

The low temperature heating

systems ( 35 - 40 °C), espe-

cially the modern ones with

floor-systems, are made

with flexible pipes positio-

ned into the screed . Becau-

se of their fixed structure

and normally not accessi-

ble, it is essential that these

pipes are preserved from

the problems caused by water that

might limit circulation or even cause

blockages.

The most common problems are

the algae - bacterial proliferation

helped by low temperatures at whi-

ch such plants work, ideal for bacte-

rial growth, which consequently le-

ads to the formation of biofilms and

therefore filiform algae in the circuit.

Sanification

In these cases it is advisable to make a sanitizing

treatment of the plant through a powerful biocide

able to reduce the bacteria in the water, in particular,

you will have to perform a shock treatment by ad-

ding THERMAKIL in ratio of 1 - 1.5 % respect to the

total circulating liquid, letting it circulate for at least a

couple of hours with proper healing DISIFLUx pump

or an external pump to be connected to the circuit

after installing a metal mesh filter 200 microns.

Protection

Once the treatment is finished, you are going to drain

the system, then perform a backwash with plenty of

water till this comes out clean, after that we will pro-

tect the circuit from the formation of corrosion and

the proliferation of algae/bacteria by adding a dual

function product FILMAx+Thermakil in ratio of 1 - 2

% of the total circulating liquid and leaving it always

work into the system. Also in this case we suggest to

periodically check the pH value which must always

remain within a range between 8 and 9.5 in order to

ensure proper corrosion protection.

2 - 3 hours

53