5
EN
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INDIRECTLY HEATING DOMESTIC HOT WATER
This circulation allows easier heat exchange between the primary
fluid and the domestic water, all over the tank surface. The
corrugations on the inner and outer shells of the ring-shaped tank
increase the area of heat exchange still further and thus speed up
the process of heating the domestic water.
◆
EASY TO SET AND SAFETY ASSURED
With a single command, the water temperature of both the primary
circuit and the hot water circuit can be set by the adjustable
thermostat situated underneath the tank in the primary circuit.
A manually reset safety thermostat shuts off the burner if the
temperature reaches 103 °C.
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BUILD FEATURES
◆
OUTER BODY
The outer body containing the primary fluid is made of STW 22
steel.
◆
TANK-IN-TANK TYPE EXCHANGER ACCUMULATOR
The ring-shaped inner tank with its large heating surface, used for
producing domestic hot water, is built using Chrome/Nickel 18/10
stainless steel. It is corrugated all the way up to the top using an
exclusive production process and entirely argon arc welded using
the TIG (Tungsten Inert Gas) method.
◆
COMBUSTION GAS CIRCUIT
The combustion gas circuit is protected by a high temperature
resistant coat of paint. This includes:
•
Flue pipes
The various ALFA Fuel models contain 8 steel flue pipes with an
inner diameter of 64 mm. Each pipe is fitted with a special steel
baffle designed to improve heat exchange and reduce the flue gas
temperature.
•
Combustion chamber
All ALFA Fuel models feature a water-cooled sealed combustion
chamber.
◆
INSULATION
The boiler body is fully insulated by rigid polyurethane foam with a
high thermal insulation coefficient. This is sprayed onto the tank
without using any CFCs.
◆
JACKET
The boiler is covered by a steel jacket which has been scoured and
phosphated before being stove finished at 220 °C.
◆
BURNER
•
The ALFA F boiler is fitted with the ACV BM R 31 oil burner.
•
The ALFA FV boiler is fitted with the ACV BM 1 LN 1 oil burner.
◆
EMPTYING THE PRIMARY CIRCUIT
(CENTRAL HEATING)
:
1 - Switch the power to the boiler off at the external isolator.
2 - Close the boiler system’s isolating valves (8).
3 - Connect a hose to the drain cock (9). Make sure that it is
properly attached.
4 - Open the drain cock and let the hot water drain out.
◆
EMPTYING THE HOT WATER TANK:
(see illustration H)
1 - Switch the mains power to the boiler off at the external isolator.
2 - Remove the pressure from the primary circuit.
3 - Close valves (7) and (11).
4 - Open valves (9) and (10) (first 9 then 10).
5 - Let the water drain away.
To allow the tank to be emptied, valve (9) must be
situated at ground level.
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SPARE PARTS
Please refer to the specific document available from ACV or your
distributor.
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GENERAL DESCRIPTION
•
Combination boiler
(central heating and domestic hot water)
.
•
TANK-IN-TANK indirect storage type domestic hot water
production.
•
Fittings required to connect the hydraulic kit for feeding the
heating circuit
(available as an optional extra)
.
•
Control panel with on/off switch, adjustable thermostat,
thermometer, Summer/Winter selector and knockout for fitting
ACV integrated control system
(optional)
.
•
The ALFA FV boiler can be connected using a balanced flue. The
ALFA F boiler is designed to be connected to a chimney.
•
The ALFA F model with output power adjustable between 19.4
and 34.2 kW is fitted with the ACV BM R 31 oil burner.
•
The ALFA FV model with output power fixed at 31.9 kW is fitted
with the ACV BM 1 LN 1 oil burner.
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DESCRIPTION OF OPERATION
◆
THE TANK-IN-TANK CONCEPT
The ALFA Fuel series differs from traditional hot water producers in
that it has a ring-shaped tank immersed in the primary fluid
contained in the outer body. When hot water from the central heating
system or the domestic hot water system is needed, the thermostat
starts up the burner. The combustion gases quickly heat up the
primary fluid, thus creating a natural circulation around the tank.
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DESCRIPTION
