Antifreeze Protection; Boiler Connection Group (Optional) - Immergas MINI EOLO X 24 3 E Instructions And Warnings

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 freez-
ing to an ambient temperature of -5°C.
Minimum temperature -15°C. If the boiler is installed in a
place where the temperature falls below -5°C, and in the event
there is no gas (or the boiler goes into ignition block), 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 page.
N.B.: if the boiler is installed in places where the temperature
falls below 0°C the domestic hot water and central heating
attachment pipes must be insulated.
Note: the antifreeze systems described in this chapter 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.
10
1.5

BOILER CONNECTION GROUP (OPTIONAL).

The connection unit consisting of all the necessary parts to
perform the hydraulic and gas system connections of the appli-
ance comes as optional kit, perform the connections based on
the type of installation to be made and according to the layout
shown in Fig 4.
V
RU MU
G 4 RR
Key:
V - Electric connection
G - Gas supply
RU - Storage tank unit return (optional)
MU - Storage tank unit flow (optional)
RR - System filling
M - System flow
R - System return
1 - System filling cock
2 - System draining valve
3 - 3-bar safety valve drain fitting
4 - Storage tank unit bypass pipe, to be used only
in case of boiler operating in room heating
mode only
3
1 R 2 M
4