9code HC0048.01GB ed.B-1406
AKY
3. TECHNICAL FEATURES
AKY condensation boilers burn natural gas or LPG. They are
designed to meet heating requirements in industrial and com-
mercial buildings.
The system’s combustion circuit is built into the boiler. Thus,
neither gas feeding line nor ue exhaust (B23P type in standard
layout) run into the room to be heated.
The equipment works as a standalone unit. In order to start
it up, you only need to connect it to power and gas supplies.
The boiler includes an electrically-operated antifreeze device.
In case of power failure, the system must be lled with a water-
glycol mixture. The glycol percentage varies according to outdoor
temperatures (for more information, see below in this Manual).
At delivery, in AKY032 and AKY034 models when lled with a
mixture of water and 30% glycol. The antifreeze liquid protects
the equipment from temperatures as low as -15°C.
In AKY050 and AKY070 model, the expansion vessel cannot
contain the entire volume of required water-glycol mixture.
Therefore, the antifreeze liquid is not pre-lled.
Boiler construction complies with manufacturing requirements
for gas-red appliances with ratings below 70 kW (EN483).
Condensation and premix technology, combined with ame
modulation, allow reaching efciency levels higher than 108%.
The stainless steel exchanger of the boiler guarantees high
levels of efciency and corrosion resistance.
The burner is entirely built with stainless steel, and it takes ad-
vantage of special mechanical solutions to guarantee optimal
reliability and performance rates, as well as high thermal and
mechanical resistance.
Different types of remote controls, supplied on demand, allow
the user to set and monitor working parameters, such as room
temperature, on/off schedule, operating mode and faults.
Intrinsic Safety
Asophisticated technique of air/gas mixing and the simultaneous
adjustment of combustion air and gas ows provide an increase
in efciency at minimum output.
This technique makes the unit safer since the ratio between
the gas ow through the gas valve and the air ow always
corresponds to the manufacturer's setting. As opposed to
atmospheric burners, in premix units the CO2content does not
change throughout the operative range of the boiler. This allows
higher efciency at lower heat output.
If combustion air fails, the gas valve shuts. If combustion air
decreases, the valve automatically reduces gas ow maintaining
optimal working parameters.
Low Pollution
Pre-mix burners equipped with an air/gas valve allow "clean"
combustion with very low polluting emissions.
3.1. Models and Efciency Rates
AKY boilers are condensation equipment with modulation burner.
Two boiler series are available:
- 00X0 series
Boiler AKY032IT-00X0
- Standard series
Boilers AKY034IT, AKY050IT, AKY070IT
Both series include condensation boilers with 4-star efciency
rate.
00X0 series features:
- Working water temperature = 80/55°C
- Circulator with xed speed and ow rate
Standard series features:
- Working water temperature = 72/45°C
- Efciency levels at maximum output greater than 100%
- Varying speed, low consumption electronic circulator
The following control devices can be used on boilers of both
series: remote control, SmartControl or SMART.NET.
SmartControl and SMART.NET allow simultaneous control of
00X0 and standard boilers.
Standard boilers are designed for reaching efciency levels
above 100% on LHV (lower heating value) at maximum thermal
output, and of 108% at minimum thermal output.
Boiler efciency rates with delivery water temperature of 72°C
are certied.
Using SmartControl or SMART.NET optional devices, the
“room compensation” feature can be enabled. Delivery water
temperature can thus be reduced in an inversely proportional
ratio to room temperature increase, reaching efciency levels
of the boiler over 108% [Hi].
The exchanger installed intoAKY boilers helps further reductions
of heat losses of the casing and enhances efciency.
