C 340
C 640
A (mm)
B (mm)
C (mm)
430
860
723
1862
2962
500
1000
1032
2172
3272
570
1140
1032
2172
3272
650
1300
1032
2172
3272
4.3
Requirements for water connections
Before installation, check that the connections meet the set
requirements.
Carry out any welding work required at a safe distance from the boiler.
If using synthetic pipes, follow the manufacturer's instructions.
4.3.1
Requirements for the central heating connections
We recommend installing a central heating filter in the return pipe to
prevent clogging of boiler components.
4.3.2
Requirements for the condensate drain
The drain pipe must be Ø 32 mm or larger, terminating in the drain.
Use only plastic material for the discharge pipe due to the acidity (pH 2
to 5) of the condensate.
Fit a watertrap or siphon in the drain pipe.
The drain pipe must slope down at least 30 mm per metre, the maximum
horizontal length is 5 metres.
Do not make a fixed connection in order to prevent an overpressure in
the siphon.
4.4
Requirements for the gas connection
Carry out any welding work required at a safe distance from the boiler.
Before installing, check that the gas meter has sufficient capacity. Take
into account the consumption of all appliances. Notify the local energy
company if the gas meter has insufficient capacity.
We recommend installing a gas filter to prevent clogging of the gas
valve unit.
Pipe diameters must be defined in accordance with ATG's (Association
Technique de Gaz) B171 specifications.
4 Preparation of installation
7762666 - v.02 - 29092020
C 340 / C 640
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