Installation & Servicing instructions ATAG iC-Range
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When powering up the boiler (described in chapter 13) an automatic air purge program will run to vent the
boiler. During this program the pressure in the central heating needs to be checked, and when necessary,
topped up again.
It may take some time before all the air has disappeared from a filled installation. Certainly during
the first week sounds may be audible that indicate air. The automatic air vent in the boiler will let this
air escape, causing the water pressure to drop during this period and water will need to be refilled
again.
Always remove the filling loop pipe after filling or topping up the heating system and close the
connections with the cap nut (3).
11.1 Hot water supply
Fill the hot water supply by opening the cold mains isolation valve.
Bleed the hot water installation by opening all hot water taps one at a time. Leave each tap to run until all air
has disappeared from the supply.
Flush with a minimum of 10 litres to rinse any residual contaminants from the hot supply and boiler.