5
1-3
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.2 MAIN DIMENSIONS.
minimum temperature required for preserving
the system.
The boilers is made from materials that are
resistant to ethylene and propylene glycol-based
anti-freeze liquids.
For life and possible disposal, follow the
supplier's instructions.
- Protect the condensate drain trap and circuit
board 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 accessory kit pack).
Boiler anti-freeze protection is thus ensured only if:
- the boiler is correctly connected to gas and
electricity power supply circuits and powered;
- the anti-freezing 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 domestic water
and heating attachment pipes must be insulated.
1.4 CONNECTIONS.
Gas connection.
Our boilers are designed to operate with NG
and Universal LPG. Supply pipes must be sized
correctly to relevant gas codes.
Before connecting the gas line, carefully clean
inside all the supply pipes to remove any residue
that could impair boiler eciency. Also make
sure the gas corresponds to that for which
the boiler is prepared (see boiler data-plate).
If dierent, the appliance must be converted
for operation with the other type of gas (see
converting appliance for other gas types). e
dynamic gas supply (NG or Universal LPG)
pressure must also be checked according to
the type used in the boiler, which must be in
compliance, as insufficient levels can reduce
boiler output and cause malfunctions.
Ensure correct gas isolation valves connection.
e gas supply pipe must be suitably dimensioned
according to current regulations in order to
guarantee correct gas flow to the burner in
conditions of maximum boiler.
N.B.: there is a special adhesive label inside the
built-in frame displaying the layout of the boiler
connections.
Fuel gas quality. The appliance has been
designed to operate with gas free of impurities;
otherwise it is advisable to fit special filters
upstream from the appliance to restore the
purity of the gas.
Cold Water connection.
Attention: Filling the system, Hunt Heating
recommends the use of Auto fill valves sold
as an optional extra. Once satisfactory system
pressure is achieved, Auto ll valve MUST BE
TURNED OFF.
Attention: in order not to void the warranty
before making the boiler connections, carefully
clean the heating system on the primary heat
exchanger (pipes, radiators, etc.) with special
cleaning products (Fernox) to remove any
deposits that could compromise correct boiler
operation.
Chemical treatment of the heating system water
is required, in compliance with the technical
standards in force, in order to protect the system
and the appliance from deposits (e.g., lime scale),
slurry or other hazardous deposits. Products like
Fernox are suitable for this appliacation. Use
of backow devices are maditory when using
chemicals/water treatments or alternatively,
ensure physical air break.
Heating Water connections must be made using
approved valves this helps with maintenance and
servicing. Hunt Heating can provide valves as
optional extras.
e boiler safety valve outlet must be connected
to a Tun Dish or Directly to a suitable overow
outlet.
1.3 ANTIFREEZE PROTECTION.
Minimum temperature -5°C. e boiler comes
standard with an anti-freeze function that
activates the pump and burner when the system
water temperature in the boiler falls below 4°C.
e anti-freeze 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 no ignition block (Par. 2.5);
- the boiler essential components are not faulty.
In these conditions the boiler is protected against
freezing to an environmental 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
may freeze.
To prevent the risk of freezing follow the
instructions below:
- Protect the central heating circuit from
freezing by introducing a good quality anti-
freeze liquid (specically for central heating
systems), (Fernox), carefully following the
manufacturer's instructions regarding the
percentage necessary with respect to the
Key:
G - Gas supply (not supplied as standard)
R - Return - CH
F - Flow - CH
SC - Condensate drain (supplied as standard)
(minimum internal diameter Ø13 mm)
C - Cold ll
Height
(mm)
Width
(mm)
Depth
(mm)
990 470 310
CONNECTIONS
CORD INLET GAS SYSTEM
C G R F
1/2” 3/4” 3/4” 3/4”
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