Antifreeze Protection; Boiler Connection Unit - Immergas VICTRIX EXA 24 X 1 ERP Instruction Booklet And Warning

1.4 ANTIFREEZE PROTECTION.

Minimum temperature -5°C.
The boiler comes standard with an antifreeze function
that activates the pump and burner when the system
water temperature in the boiler falls below 4°C.
In these conditions the boiler is protected against freezing to an
ambient temperature of -5°C.
Minimum temperature -15°C.
If the boiler is installed in a place where the temperature drops
below -5°C, the appliance can freeze.
To prevent the risk of freezing follow the instructions below:
- protect the central heating circuit from freezing by inserting
a good-quality antifreeze liquid into this circuit, which is
specially suited for central heating systems and which is
manufacturer guaranteed not to cause damage to the heat
exchanger or other components of the boiler. The antifreeze
liquid must not be harmful to one's health. The instructions
of the manufacturer of this liquid must be followed scrupu-
lously regarding the percentage necessary with respect to the
minimum temperature at which the system must be kept.
Attention: the excessive use of glycol could jeopardise the
proper functioning of the appliance.
- An aqueous solution must be made with potential pollution
class of water 2 (EN 1717:2002 or local standards in force).
- The materials used for the central heating circuit of Immergas
boilers withstand ethylene and propylene glycol based anti-
freeze liquids (if the mixtures are prepared perfectly).
- For life and possible disposal, follow the supplier's instruc-
tions.
- Protect the domestic hot water circuit against freezing by
using an accessory that is supplied on request (antifreeze kit)
comprising two electric heating elements, the relevant wir-
ing and a control thermostat (carefully read the installation
instructions contained in the accessory kit pack).
In these conditions the boiler is protected against freezing to
temperature of -15°C.
Boiler antifreeze protection (both -5°C and -15°C) is thus
ensured only if:
- the boiler is correctly connected to gas and electricity power
supply circuits;
- the boiler is powered constantly;
- the boiler is not in "off " mode.
- the boiler is not in anomaly conditions (Parag. 2.5);
- the essential components of the boiler and/or antifreeze kit
are not faulty.
The warranty does not cover damage due to interruption of the
electrical power supply and failure to comply with that stated
on the previous pages.
10
N.B.: if the boiler is installed in places where the
temperature falls below 0°C the domestic hot wa-
ter and central heating attachment pipes must be
insulated.
Note: the antifreeze systems described in this chap-
ter are only to protect the boiler. The presence of
these functions and devices does not exclude the possibility
of parts of the system or domestic hot water circuit outside
the boiler from freezing.

1.5 BOILER CONNECTION UNIT.

The connection unit, which is composed of all the required ac-
cessories to connect the appliance's hydraulic and gas system, is
furnished as an optional kit. Execute connections as indicated in
the relative instructions fiche by using the connections represented
in fig. 4.
Attention: when installing the connection kit (optional), it is com-
pulsory to insert a flat gasket on the gas and hot water outlet fittings.
Key:
V - Electrical connection
1 - Filling cock
2 - Draining valve
3 - Bypass (Note: to disassemble if coupled with an external
storage tank unit)
2
1
3
V
4