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6.3 Gas connection
The appliance pipe is fitted with an internal thread, into which the tail piece of the gas
isolation valve can be screwed.
United Kingdom:
The gas supply must comply to the current Gas Safety, Installation & Use Regulations.
Ireland:
The connection to the appliance must include a suitable method of disconnection and a
gas control cock must be installed adjacent to the appliance for isolation purposes. The
nominal inlet working gas pressure measured at the appliance should be 20 mbar for Nat
gas (G20).
Make sure that the gas pipe work does not contain dirt, particularly with new
pipes.
When the boiler has to be converted from natural gas to LPG, ATAG provides special
LPG
kits for this purpose. Special instructions are supplied with the kit.
Always check the installation of all of the parts through which gas flows (using
leak-search spray)
6.4 Condensation drain pipe
ATAG Condensing boilers have the top SEDBUK band A Classification for high energy
efficiency in heating and domestic hot water.
All ATAG wall hung gas fired condensing boilers contain a syphonic condensate trap to
collect and realease condensate.
The amount of condensate formed is determind by the type of boilers and the water
temperature produced by the boiler.
Condensate pipework.
Use plastic pipework of a diameter no less then 25mm.
Routing of the pipework,
Wherever possible, the condensate pipework should be routed internally to prevent
freezing.
The condensate pipework must fall at least 50mm per metre towards the outlet and take
the shortest possible route
Support the pipe at least every 50 cm for near horizontal sections and 1 metre for vertical
sections
External pipework
The pipework should be kept to a minimum and the route as vertical as possible.
Do not exceed 3 metres outside the dwelling.
The condensate pipe must be run using suitable corrosion resistant materials (eg. plastic).
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Irish standard 813
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Domestic gas installations
11
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