25
INSTALLER
PREMIXING WATER + GLYCOL
Glycol anti-freeze is supplied separately and must be
premixed with water in a suitable container before being
used to fill the system. For example, a mix of 40% glycol
and 60% water provides anti-freeze protection down to a
temperature of -21°C.
Anti-freeze
Temperature
Density
50%
-32 °C
1,045 kg/dm
3
40%
-21 °C
1,037 kg/dm
3
30%
-13 °C
1,029 kg/dm
3
b
The propylene glycol supplied is specially formulated
for solar collector applications and remains fully
efficient throughout the -32 to +180°C temperature
range. It is also non-toxic, biodegradable and
biocompatible.
b
Do NOT part fill the circuit with pure glycol then add
water later.
b
Do not use automatic or manual filling systems.
b
If the water supply is highly chlorinated, use distilled
water to prepare the glycol/water mix.
