Protection The Water Circuit Freezing - Samsung EHS AE050RXYDEG/EU Manual

6. Piping installation

Protection the water circuit freezing

To prevent the hydraulic components from freezing, it has a freezing protection function that includes activation of the
pump at low temperatures.
However, in case of a power failure, these functions cannot guarantee protection.
To protect water circuit from freezing, any of the following acts shall be performed.
• Add glycol to water. Glycol lowers the freezing point of water.
• Install the anti freeze valve. The anti freeze valve discharges water from the system before it freezes.
Freeze protection by glycol
Freeze protection solutions must use propylene glycol with a toxicity rating of Class 1 as listed in Clinical Toxicology of
Commercial Products, 5th Edition.
WARNING
• Ethylene glycol is toxic and must not be used in the primary water circuit in case of any cross-
contamination the potable circuit.
• If you add glycol to the water, do NOT install anti freeze valve. Glycol leaking out of the anti freeze valve.
• If a anti freeze is used, pressure drop and capability degradation of the system can be occurred.
CAUTION
• Due to the presence of glycol, corrosion of the system is possible. Uninhibited glycol will turn acidic
under the influence of oxygen. The acidic uninhibited glycol attacks metal surfaces and forms galvanic
corrosion cells that cause severe damage to the system.
• A glycol with corrosion inhibitors is selected to counteract acids formed by the oxidation of glycols.
• No automotive glycol is used because their corrosion inhibitors have a limited lifetime and contain
silicates which can foul or plug the system.
• Galvanized pipes are NOT used in glycol systems since the presence may lead to the precipitation of
certain components in the glycol's corrosion inhibitor.
Installer reference guide / Mono tank integrated type 73