12
INSTALLER
FILLING THE SOLAR COLLECTOR CIRCUIT
Heat transfer liquid
The anti-freeze supplied contains non-toxic, biodegrada-
ble and environmentally friendly propylene glycol. Mix the
propylene glycol with water (preferably demineralised).
Establish the necessary concentration of propylene gly-
col using the table alongside on the basis of the tempera-
tures for which anti-freeze protection is required.
b
Only use the products listed in the
B
Catalogue
to top up the circuit.
Pressure and gravity filling
- Premix a sufficient volume of water and glycol solu-
tion in a suitable container, selecting the right con-
centration according to the table above.
Pressure
filling
- Use lengths of rubber hose to connect a pump be-
tween the container and the hose union on the fill-
ing/drain cock (1). Open the cock.
- Start up the pump and fill the solar heating circuit
until the heat transfer liquid starts to flow out of the
fitting (2) at the top of the storage tank.
Gravity
filling
- Use a length of rubber hose to connect the contain-
er to the filling/drain cock (1). Open the cock.
- Fill the solar heating circuit under gravity until the
heat transfer liquid starts to flow out of the fitting (2)
at the top of the storage tank.
When the storage cylinder is full:
- Close the cock (1).
- Fit the safety valve (3) to the fitting (2).
Anti-freeze
Temperature
Density (20 °C)
55%
-40 °C
1,048 kg/dm
3
50%
-32 °C
1,045 kg/dm
3
45%
-26 °C
1,042 kg/dm
3
40%
-21 °C
1,037 kg/dm
3
35%
-17 °C
1,033 kg/dm
3
30%
-14 °C
1,029 kg/dm
3
25%
-10 °C
1,023 kg/dm
3
1
2
3
1
2
3
