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5.2
Pipework and gas supply
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Always follow the national standards for gas appliances
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Only metal pipes (steel or copper) are permitted
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At the end of the pipe in the vicinity of the appliance an approved shutoff valve is
necessary for disconnecting the appliance from the gas network
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Check that there is no dust or dirt in the pipe before connecting it to the appliance
in order that the gas supply cannot become blocked
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Vent the supply pipe before connecting it to the appliance
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Connect the gas shutoff valve and the appliance with a separate thread nut
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The gas connection is provided with a 3/8" G internal thread and is located on the
right at the rear of the appliance
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Only approved material can be used for the thread seals
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For copper pipes, use brazing solder with a melting temperature greater than
450 °C
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The pressure loss on the pipes may not exceed 1 millibar
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Only use bicone connections with thick-walled nuts, min. 0.7 x Ø. Inferior
connections are highly dangerous because the brass nut can crack over time and
thus cause gas leakage
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Avoid mechanical stress on the gas control block and the pipes.
5.3
Flue gas systems
Only use original Well Straler concentric tubes of Ø 100 internally and Ø 150
externally. Our appliances are approved for these terminals and can thus only be
used with these terminals. Well Straler therefore cannot guarantee proper
functioning and safety if other components are used and so cannot be held
responsible if problems arise.
All elements of the air supply and the gas flue must have at least 25 mm of
overlap when fitted together and be fastened with clamps or stainless steel Parker
screws so they do not slide apart.
5.4
Connection options
𝐶
11
: Air supply and gas flue through a wall in the same pressure zone.
𝐶
31
: Air supply and gas flue through a roof terminal in the same pressure zone.
𝐶
91
: Air supply and gas flue through a roof terminal in the same pressure zone, using an
existing chimney equipped with a flexible flue liner for the gas flue. Through the space
between this flexible flue liner and the existing chimney, combustion air is transported to
the appliance.