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vironments. To permit the circuit to drain, make sure that the drain
valves have been installed in the lowest points of the circuit and that
they are open.
ANTI-FREEZE PROTECTION
The addition of glycol is the only effective protection against freezing; the glycol/
water solution must be sufficiently concentrated to ensure proper protection and
prevent ice forming at minimum temperature provided for a given installation.
Take the necessary precautions if using non-passivated anti-freeze solu-
tions (monoethylene glycol or monopropylene glycol). Corrosion phenom-
ena may occur with these anti-freeze solutions in contact with oxygen.
However, always refer to the glycol supplier documentation to check its recom-
mended concentration.
IT IS FORBIDDEN! to insert glycol in the hydraulic circuit near the
pump intake:
— A high concentration of glycol and additives that exceeds the permissible limits
could cause the blockage of the pump;
— Do not use the pump as a mixer.
