Euroterm ESK 2.5 SB, Installation Manual

FILLING

PREPARATION OF MIXTURE OF WATER + glycol

Glycol is supplied separately in the standard package and mixed with water in the tank before filling the 

installations (for example. 40% glycol and 60% water-resistant to frost temperatures from -21 ° C). 

Fill the solar system exclusively with polypropylene glycol which is intended specifically for use in solar 

devices. Polypropylene glycol retains its properties in the area of 32 ÷ 180 ° C.

Polypropylene glycol is biologically compatible and not toxic.

Do not fill pure glycol first and then add water.  

If the water contains a high level of chlorine is it necessary to use a distilled water .

         Antifreeze        temperature                 Density 

               50%                  -32 ° C       

    1.045 kg/dm3 

               40%                  -21 ° C       

    1037 kg/dm3 

               30%                  -13 ° C       

    1.029 kg/dm2 

FILLING

1 - Open the valve (A) 

2 - The manual venting valve at the highest point (see 

drawing ) shall be open during charging 

3 - Open the venting valve (7) 

4 - Allow the liquid driven by external pump circulates until all air 

bladders are removed. Close the manual venting valve. 

5 - Raise the pressure in the installation at 4 bar. 

6 - Leave the installation to work about 20 minutes 

7 - Repeat the procedure from point 2, while 

the air is completely dropped 

8 - Adjust the pressure in the installation of 3 bar. 

- Close the valve (A) and venting valves, to prevent possible 

evaporation of heat transfer fluid. 

Do not fill the installation during full insolation and while collectors are hot. 

The system must not be replenished with water.

7

A