6
1-2
INSTALLERUSERMAINTENANCE TECHNICIAN
Key:
G - Gas supply
AC - Domestic hot water outlet
ACV - Solar valve kit D.H.W. inlet
(Optional)
AF - Domestic cold water inlet
R - System return
M - System ow
V - Electrical connection
* = the boiler is equipped with a 90° gas
cock with 3/4” attachments and Ø18
mm tting to be welded.
Height
(mm)
Width (mm) Depth (mm)
781 440 340
CONNECTIONS
GAS
DOMESTIC
HOT WATER
SYSTEM
G AC AF R M
3/4”* 1/2” 1/2” 3/4” 3/4”
1.2 MAIN DIMENSIONS.
1.3 ANTIFREEZE PROTECTION.
Minimum temperature -5°C. e boiler is sup-
plied with an antifreeze function as standard that
activates the pump and burner when the system
water temperature in the boiler falls below 4°C.
e antifreeze function is only guaranteed if:
- the boiler is correctly connected to gas and
electricity power supply circuits;
- the boiler is powered constantly;
- the boiler is not in “O” mode;
- the boiler is not in ignition failure block (Par.
2.5);
- the boiler essential components are not faulty.
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 falls
below -3°C and in the event there is no gas (or
the boiler goes into ignition failure block), the
appliance can freeze.
To prevent the risk of freezing follow the instruc-
tions below:
- protects the central heating circuit from freez-
ing by introducing a top quality anti-freeze
liquid into this circuit, which is not noxious to
health. e instructions of the manufacturer of
this liquid must be followed scrupulously re-
garding the percentage necessary 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 regulations in force).
Warning: the excessive use of glycol could
jeopardise the proper functioning of the ap-
pliance.
e 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 (antifreeze 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).
Boiler antifreeze protection is thus ensured only if:
- the boiler is correctly connected to electricity
power supply circuits;
- the main switch is on;
- the antifreeze kit components are ecient.
In these conditions the boiler is protected against
freezing to temperature of -15°C.
e 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 falls below 0°C, the heating attach-
ment pipes must be insulated.
STD.002998/004
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