15
Solar Thermal Anti-Freeze
CoolSky recommend that a Solar Thermal
Anti-Freeze Fluid is ‘always’ used in Solar
Collector Installations. CoolSky supply a pre-
mixed (40% propylene glycol, 60% water)
thermal transfer fluid with additional
corrosion inhibitors for use with the Apricus
Solar Collectors. The fluid is supplied in 20
litre drums.
Only Thermal Fluids that are formulated for
use with High Performance Evacuated Tube
Solar Collectors should be used, as these
have special liquid corrosion inhibitors that
are able to vaporise and condense effectively
during normal collector operation.
The fluid is specially developed for
Evacuated Tube Solar Thermal collectors and
provides frost protection to -28°C.
Protective goggles and rubber gloves should
be used when handling the thermal fluid.
A full Material Safety Data Sheet (MSDS) is
available from CoolSky Ltd. upon request.
Disposal of the fluid should be in accordance
with local regulations.
Although some Solar Controllers are
provided with a Frost Protect Function it
must be highlighted that this only functions
when there is electrical power provided to
the controller and pumps. In the UK and
Ireland it is not unusual for extremely cold
weather conditions to be accompanied by
power outages due to falling power lines,
thereby rendering the Frost Protection
Function ineffective. Only the use of a
suitable anti-freeze fluid will protect the
solar collector from freezing in the combined
conditions of extreme cold and power
outage.
Apricus Evacuated tubes are not susceptible
to damage in cold weather, and Apricus heat
pipes are protected against damage that
could result from the freezing of the water
inside by the addition of a special frost-
protection additive.
Within the manifold and pipework of the
solar loop a suitable Solar Anti-Freeze fluid
must be used. Contact CoolSky for details of
suitable Anti-Freeze Fluids.
✖
Freeze related damage is not eligible for
warranty claims.
WARNING
:
Failure to implement effective (and
fail-safe) freeze protection may result
in rupture of piping and substantial
property damage.