Main Dimensions; Antifreeze Protection; Gas Connection - Immergas VICTRIX EXA 28 1 ERP Instruction And Recommendation Booklet

1.2

MAIN DIMENSIONS.

1.3 ANTIFREEZE PROTECTION.

Minimum temperature -5°C. The boiler comes
standard with an anti-freeze function that ac-
tivates 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. In the event the
boiler is installed in a place where the tempera-
ture falls below -5°C, the appliance can freeze.
To prevent the risk of freezing follow the instruc-
tions 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 manu-
facturer 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
scrupulously regarding the percentage neces-
sary 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 or local regula-
tions in force).
The materials used for the central heating circuit
of Immergas boilers withstand 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 domestic hot water circuit against
freezing by using an accessory that is supplied
on request (anti-freeze kit) comprising two
electric heating elements, the relevant cables
and a control thermostat (carefully read the
installation instructions contained in the ac-
cessory kit pack).
Key:
V - Electrical connection
G - Gas supply
AC - Domestic hot water outlet
ACV - Solar valve kit D.H.W. inlet (optional)
AF - Domestic cold water inlet
SC - Condensate drain (minimum internal diameter Ø 13 mm)
R - System return
M - System flow
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 elec-
tricity power supply circuits;
- the boiler is powered constantly;
- the boiler is not in "off " mode;
- 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.
NOTE: 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.
6
Height Width Depth
(mm) (mm) (mm)
763 440
CONNECTIONS
DOMESTIC
GAS SYSTEM
HOT WATER
G AC AF R
3/4" 1/2" 1/2" 3/4"

1.4 GAS CONNECTION.

Our boilers are designed to operate with methane
gas (G20) and L.P.G. Supply pipes must be the
same as or larger than the 3/4"G boiler fitting.
Before connecting the gas line, carefully clean
inside all the fuel feed system pipes to remove
any residue that could impair boiler efficiency.
Also make sure the gas corresponds to that for
which the boiler is prepared (see boiler data
name plate). If different, the appliance must be
converted for operation with the other type of
gas (see converting appliance for other gas types).
The dynamic gas supply (methane or LPG)
pressure must also be checked according to the
type used in the boiler, which must comply with
the technical standards in force, as insufficient
levels can reduce generator output and cause
malfunctions.
Ensure correct gas cock connection. The gas sup-
ply pipe must be suitably dimensioned according
to current regulations in order to guarantee cor-
rect gas flow rate to the burner even in conditions
of maximum generator output and to guarantee
appliance efficiency (technical specifications).
The coupling system must conform to technical
standards in force.
Fuel gas quality. The appliance was designed
to operate with combustible gas free of impuri-
ties; otherwise it is advisable to fit special filters
upstream of the appliance to restore the purity
of the fuel.
Storage tanks (in case of supply from LPG
depot).
- New LPG storage tanks may contain residual
inert gases (nitrogen) that degrade the mixture
delivered to the appliance casing functioning
anomalies.
- Due to the composition of the LPG mixture,
layering of the mixture components may occur
during the period of storage in the tanks. This
can cause a variation in the heating power of
the mixture delivered to the appliance, with
subsequent change in its performance.
1-2
303
M
3/4"