Installation & Servicing Instructions ATAG Q-Series
14
6.5 Gas connection
The appliance pipe is tted 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 Regulations.
Ireland:
- Irish standard 813
- Domestic gas installations
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
kits for this purpose. Special instructions are supplied with the kit.
Always check the installation of all of the parts through which gas ows using
leak detection uid (LDF).
6.6 Hot water supply
Connection of the drinking water installation should be done according to the national
water laws.
The sanitary water pipes can be connected to the installation by means of compression
ttings. The cold water inlet on the Combi boilers must be provided with the following
(counted in the water ow direction):
Flow restrictor (supplied), Safety group, Expansion vessel 6bar (potable water, blue).
A ow restrictor must be tted in the cold water pipe. The ow restrictor ensures that
a quantity of water is supplied which has a guaranteed outlet temperature of 60°C
(assuming a cold water temperature of 10°C). The quantity of water is virtually unaffected
by the water pressure.
With a water pressure lower than 1.5 bar it is advisable to remove the inside mechanism
of the ow restrictor.
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