CLIVET WSAT-YES 18.2, Руководство пользователя

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Risk of freeze
If the unit or the relative water connections can be subject to
temperatures close to 0°C:

Mix water with ethylene glycol, or
 Safeguard the pipes with heating cables placed under the
insulation, or

Empty the system in cases of long non-use
Anti-freeze solutions
Consider that the use of anti-freeze solution determines an
increase in a pressure drop.
Make sure that the glycol type utilized is inhibited (not
corrosive) and compatible with the hydraulic circuit components.
Do not use different glicol mixture (i.e. ethylic with propylene).
% ETHYLENE GLYCOL BY WEIGHT
5% 10% 15% 20% 25% 30% 35% 40% 45% 50%
Freezing temperature
°C -2 -3.9 -6.5 -8.9 -11.8 -15.6 -19.0 -23.4 -27.8 -32.7
Safety temperature °C 3 1 -1 -4 -6 -10 -14 -19 -23.8 -29.4
Water filter
 Must be installed immediately in the water input of the unit,
in a position that is easily accessible for cleaning.

The filter never should be removed, this operation invalidates
the guaranty.
Recommended filter :
0,5 mm (30 mesh)
The unit must always be protected
from freeze.
Otherwise irreversible damage may
occur.