Antifreeze Protection - Immergas VICTRIX HYBRID PLUS Manual

Basic requirements.
The minimum water content required within the system is 20 litres; otherwise, it will be necessary to install an inertial storage
tank (optional).
For proper system operation, make sure that the minimum flow rate in operating conditions never drops below 500 l/h.
When the circulation within each room central heating loop is controlled by remotely operated valves, it is important to guar-
antee the minimum water content (20 litres), even if all the valves are closed.
When the circulation within each or certain room central heating loops is controlled by remotely operated valves, it is impor-
tant to guarantee the minimum flow rate, even if all the valves are closed. It is necessary to have a loop that is always open on the
system (by-pass or non-intercepted zone), to allow some functions such as, for example, the antifreeze function.
Make sure that the expansion vessel present in the indoor unit is sufficient for the hydraulic circuit; otherwise use the optional
vessel.
If you are using one or more booster pumps it is essential to install a hydraulic separator (not supplied by Immergas) down-
stream of the Indoor Unit.
The minimum required 20l must be guaranteed between the indoor unit and the hydraulic separator.
Make sure to connect the flow from heat pump (MHT) of the outdoor unit to the system return (R) of the indoor unit.
With Victrix Hybrid Plus, in case of connection to the storage tank unit, the return present on the storage tank unit (RU) must
be connected to the return of the Outdoor unit (RHT).
The storage tank unit return connection, present in the indoor unit, is not used and must be closed.
In the case of kit installation or maintenance of the Victrix Hybrid Plus, always empty the system and DHW circuits first (when
combined with a storage tank unit), to avoid compromising its electrical safety (see Parag. 2.15).
Only for Audax.DK4.
The appliance operates with R32 refrigerant gas.
This gas is ODOURLESS.
Pay the utmost attention
Strictly follow the instruction handbook of the Outdoor Unit before installation and any type
of operation on the chiller line.
R32 refrigerant gas belongs to the low flammability refrigerant category: class A2L according
to standard ISO 817. It guarantees high performance with low environmental impact. The new
gas reduces the potential environmental impact by one third compared to R410A, having less
effect on global warning (GWP 675).
1.4

ANTIFREEZE PROTECTION

Freezing may damage the system.
Freezing of components must therefore be prevented by performing the following actions:
- The indoor unit is equipped with special antifreeze protection functions, which activate the unit's circulator and burner in the event of
low temperatures. As per standard, these functions protect the indoor unit down to a minimum temperature of -5°C. With the anti-
freeze kit, the protection of the indoor unit is guaranteed down to a minimum temperature of -15°C.
12