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9
Connecting boiler
The boiler has the following connection pipes;
-
The central heating pipes.
The boiler is provided with isolation valves on the flow and return pipe to which the installation can be
connected by means of 22mm compression fittings;
-
The gas pipe.
The boiler is provided with an isolation gas valve to which the gas line can be fitted with 22mm
compression fitting;
-
The condensation drain pipe.
It consists of a 25mm flexible plastic pipe. The drain pipe can be connected to this by means of an open
connection;
- The flue gas exhaust system and air supply system.
It consists of a concentric connection 60/100 mm.
See following chapters for detailed information regarding each connection.
It is advisable to clean all of the boiler's connecting pipes and/or to power flush the installation
before connecting it to the boiler.
9.1
Open vent heating system
This boiler is only suitable for installations that have been equipped with "open" expansion tanks
(open vent).
Connect the central heating system according to the current regulations.
450 mm
Min. height
1000 mm
Min.
Boiler
Scheme open vent system
Installation & Servicing instructions ATAG iR-Range
Open vent heating system
Recommended relationship
between pump, cold feet and vent.
DHW
cylinder
Pump
150 mm Max.
Heating
circuit
Figure 9.1.a
13
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