6
1-2
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
1.2 MAIN DIMENSIONS.
Key:
V - Electrical connection
G - Gas supply
RU - Storage tank unit return
MU - Storage tank unit flow
RR - System Filling
SC - Condensate drain
(minimum internal diameter Ø13 mm)
R - System return
M - System flow
1.3 ANTI-FREEZE PROTECTION.
Minimum temperature -3°C.
The boiler comes
standard with an antifreeze function that ac-
tivates the pump and burner when the water
temperature inside the boiler drops 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 instruc-
tions below:
- protect the central heating circuit from freez-
ing by inserting a quality antifreeze liquid into
this circuit, which is specifically adequate for
central heating systems and which is guaran-
teed by the manufacturer 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 strictly fol-
lowed regarding the necessary percentage with
respect to the minimum temperature at which
the system must be kept. An aqueous solution
must be made with potential pollution class of
water 2 (EN 1717:2002).
The materials used for the central heating circuit
of Immergas boilers resist ethylene and propylene
glycol based antifreeze liquids (if the mixtures are
prepared perfectly).
For life and possible disposal, follow the sup-
plier’s instructions.
- Protect the system fill-up circuit and the con-
densate drain trap from freezing by using an
accessory that is supplied on request (antifreeze
kit) including an electric resistance, the relevant
wiring and a control thermostat (carefully read
the installation instructions in the accessory kit
pack).
In these conditions the boiler is protected against
freezing to temperature of -15°C.
Boiler antifreeze protection (both -3°C and -15°C)
is thus ensured only if:
- the boiler is correctly connected to the gas and
electricity power supply circuits;
- the boiler is powered constantly;
- the boiler is not in stand-by (
).
- the boiler is not in anomaly conditions (parag.
2.6);
- the essential components of the boiler and/or
antifreeze kit are not faulty.
The warranty does not cover damage due to inter-
ruption 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 drops below 0°C, the heating
attachment pipes must be insulated. The water in
the storage tank unit (if present) is not protected
against freezing when the boiler is switched off.
Height
(mm)
Width
(mm)
Depth
(mm)
835
440
350
CONNECTIONS
GAS
WATER
SYSTEM
G
RR
R
M
1/2”
1/2”
3/4”
3/4”
