Alarko ACK2, Руководство по эксплуатации

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After the installation of the boiler all the water and fuel connections and
valves must be controlled for leakage.
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For ACK2 and ACK3 type boilers, it is advisable to have a three-way valve
between flow and return line in order to keep the water return line over
55 °C in order to overcome condensation problem.
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ACK2 and ACK3 boilers have condensation outlet which is on the boiler
flue gas side, this outlet shall be drained with a siphon in order to
prevent flue gas leakage from boiler. Condensation drain shall be
according to local codes.
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ACK2 and ACK3 boilers, it is advisable to have the circulation pump on the
flow direction at closed expansion systems and on the return line on open
vented expansion systems.
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For ACK2 and ACK3 boilers, it is advisable to have the safety valve on flow
line to the connection present on the boiler outlet pipe without any valve.
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For connection of the closed expansion tank it is advice to have on return
line and a lockable valve + drain valve is advised only for servicing.
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If necessary, national regulations regarding the condensate waste disposal
rules shall be applied.