Outdoor Unit Installation - Immergas VICTRIX HYBRID PLUS Manual

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Table of Contents

- The materials used for the central heating circuit of Immergas units resist ethylene and glycol based antifreeze liquids (if the mixtures

are prepared perfectly). Adding glycol lowers the freezing point of water.

- The required concentration depends on the lowest expected outside temperature, in any case not below -25°C, and whether or not the

risk of bursting or freezing of the system is to be prevented. More glycol is required to prevent the system from freezing. Add glycol

according to the indications of the table below.

- An aqueous solution must be made with potential pollution class of water in compliance with the local standards in force.

- For life and possible disposal, follow the supplier's instructions.

Protection from risk of bursting: glycol prevents the pipes from bursting, but it does NOT prevent freezing of the liquid they

contain.

Protection from risk of freezing : glycol prevents freezing of the liquid contained inside the pipes.

Lowest expected external temperature

–5°C

–10°C

–15°C

–20°C

–25°C

• The required concentration may vary according to the type of glycol. ALWAYS compare the requirements of the table above

with the specifications provided by the glycol manufacturer. If necessary, comply with the requirements provided by the

glycol manufacturer.

• The concentration of additional glycol must NEVER exceed 35%.

• If the liquid in the system should feeze, the pump will NOT be able to start. Remember that the risk of freezing of the liquid in

the system is present if even if the bursting risk of the system is prevented.

If the glycol concentration is sufficient to protect the unit in all outdoor temperature conditions, set "Level 1" in the parameter "O.U. anti-

freeze protect.". Whereas if the protection is only partial, set "Level 2" in the same parameter (par. 2.16).

The presence of glycol may trigger corrosion of the system, since glycol without inhibitors becomes acid under the influence of

oxygen. The process is accelerated by the presence of copper and high temperatures. Non-inhibited acid glycol affects metallic

surfaces and creates galvanic corrosion cells that cause serious damage to the system.

Therefore, it is important that:

Freezing of components must therefore be prevented by performing the following actions:

- A proper water treatment is performed by a specialised technician;

- A glycol with corrosion inhibitors able to contrast the acids formed by glycol oxidation is selected;

- Automotive glycol is not used, since its corrosion inhibitor has a limited duration and contains silicates which may obstruct or clog the

system;

- Galvanised pipes are NOT used in systems with glycol, since their presence may cause some components in the inhibitor to be corrod-

ed by glycol;

- Ensure proper frost protection of the connection pipes between the indoor unit and the outdoor unit.

In the event of failure to use antifreeze fluid, damage resulting from power failure and failure to comply with the preceding

paragraphs shall be excluded for the effectiveness of the warranty.

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