Specifications

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 All electrical connections must be according to current standards and wiring
diagrams are given in this manual. Please pay special attention to earth connections
to all electrical items in the boiler room. Never use fuel or water pipes as an earth
connection.
 The boiler chimney connections should be designed according to the norms
and the distance between boiler and the chimney must be minimum. The
chimney connection must be executed according to the required technique;
the ducts must be easily dismountable with no counter slopes, fissures, elbow
curves, etc. For quick guide a Stack dimension chart is given in this manual.
 There must not be any valves between the boiler and the safety items such as
high pressure safety valve, safeguard against lack of water, pressure limiter, and
expansion tank. Only you can have an engineer’s lockable isolating valve can be
placed before the closed expansion tank for maintenance purposes.
 After the installation of the boiler all the water and fuel connections and valves
must be controlled for leakage.
 For ACK2 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.
 ACK2 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.
 ACK2 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.
 For ACK2 boilers, it is advisable to have the safety valve on flow line to the
connection present on the boiler outlet pipe without any valve.
 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.
 If necessary, national regulations regarding the condensate waste disposal rules
shall be applied.
8.1 SAFETY ARRANGEMENTS
Heating system shall be equipped with safety arrangements against, exceeding
the maximum operating temperature and exceeding the maximum operating
pressure. Safety arrangements shall be designed in accordance with the type of
heating system, energy source, and the way which the heat supply is provided to the
heating system, i.e. automatically controlled or manually operated. Minimum
required safety arrangement is under the responsibility of the installer and must be
according to local codes and/or EN 12828.
8.1.1 MINIMUM SAFETY EQUIPMENT REQUIRED FOR SEALED SYTEMS
Protection against exceeding the maximum operating temperature;
Each boiler shall be served by a safety temperature limiter (manual reset
thermostat) including a specific sensor and the boiler temperature shall not rise by
more then 10 K after switching off the heating or fuel supply line. The temperature
limiter shall confirm current EN 60730-2-9 or have CE mark. If one of the boiler
control panel is purchased (optional) then this item is present on all kinds of boiler
control panels.