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ENGLISH
FRANCAIS
NEDERLANDS
ES
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ALIAN
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TSCH
664Y0200.C
general description
• Combined boiler and water heater
(heating and DHW).
• Hot water generated by the TANK-IN-TANK indirect storage
system.
• Equipment required: a water connection kit for the heating
circuit supply (optional).
• The control panel contains a main switch, a control thermostat
for the S/SV models or potentiometer for the M/MV models,
a thermometer, a Summer/Winter switch and a knockout for
the built-in ACV control system (optional).
• Alfa Sprint models SV and MV can be connected as a balanced
flue system using a type C concentric or parallel chimney
adapter xx, or connected directly to the chimney with a type
B23 chimney adapter.
• Alfa Sprint models S/SV have a fixed output of 31.95 kW
respectively and are fitted with the ACV BG 2000-S or SV gas
burner.
• Alfa Sprint models M/MV have a modulating output of 9.2 to
31.15 kW respectively and are fitted with the ACV BG 2000-M
or MV gas burner.
operating principle
The “Tank-in-Tank” concept
The Alfa Sprint range of boilers differs from conventional hot water
heaters in that it features a ring-shaped tank which is immersed
in the primary water, and which is itself contained in the outer
body. The thermostat/potentiometer activates the burner when
the heating system or the hot water circuit calls for heat. The
combustion gases quickly heat up the primary water and set up a
natural circulation around the tank.
Indirect hot water heating
This circulation causes heat to be exchanged between the primary
water and the domestic water; heat is exchanged across the entire
surface of the tank. Corrugations on the inner and outer shells of
the ring-shaped tank further increase the heat exchanger surface,
thereby accelerating the water heating process.
Simple to control, safety assured
The temperature of the water in both the heating circuit and the
hot water circuit is regulated by a single control. This is achieved by
means of the control thermostat or the potentiometer whose bulb
is located under the tank in the heating circuit.
A manual reset high limit thermostat locks the burner out if the
temperature of the primary water reaches 103°C.
design characteristics
Outer body
The outer body which holds the primary water is made from STW
22 heavy gauge steel.
“Tank-in-Tank” type storage exchanger
The ring-shaped inner tank is made from 18/10 austenitic
stainless steel and features a large heat exchanger surface for
rapid hot water heating. It is corrugated over its full height by
means of an exclusive production process, and is fully argon
welded using the TIG (Tungsten Inert Gas) method.
Combustion gas circuit
The combustion gas circuit is protected by high temperature paint.
The circuit comprises:
• Flue ways.
The Alfa Sprint range has 8 steel flue ways with an inside
diameter of 64 mm. Each flue way has baffles made of special
steel designed to improve the heat exchange and reduce the
flue gas outlet temperature.
• Sealed combustion chamber.
The combustion chamber is water-cooled.
Insulation
The boiler body has full sprayed-on rigid polyurethane foam
insulation with a high insulation coefficient. No CFC emissions are
created by the spraying process.
Casing
The boiler is covered with a steel casing that has been stove
enamelled at 220°C after scouring and phosphating.
DESCRIpTIoN
Summary of Contents for alfa Sprint M
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