Alarko ACK2, Operation Manual

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These boilers have been designed to heat hot water and must be
connected to a heating plant and/or a domestic hot water plant within the
limits of its performance and output.
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ACK2 and ACK3 boilers are hot water boilers with a maximum outlet
temperature of 90 °C (up to 105 optional) . Return water temperatures
must not be lower then 55 °C on oil and 60°C on gas firing .
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These boilers are not suitable for use as a direct water heater. Where
potable or sanitary hot water is required, a matching indirect heat
exchanger must be provided in the system.
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These boilers are suitable for Liquid (6 cSt at 20ÚC oil) and gaseous
(Natural gas, Town gas, LPG) fuels. Please ask your seller for the details
of the Local suitable fuels which can be fired in ACK2 series boiler.
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This boiler must be fired by a compatible burner (CE marked) certified to
EN 76 (gas firing) or EN 267 (oil firing) to comply with the Boiler Efficiency
Directive 92/42/EEC.
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This boiler is suitable for use in either open vented or pressurized expansion
vessel heating systems. The system must have a matching expansion
system.
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Second pass heat transfer combustion gas pipes have turbulators in
order to maximize heat transfer to water.
OPERATION CONDITIONS