Venting - Vaillant ecoTEC plus SERIES Installation And Maintenance Instructions Manual

a a
Safety 3
tems, is preset to 3 bar and is fitted with a 15 mm compres-
sion connection for the discharge pipe, whose diameter
must not be less than 15 mm. The pressure relief valve must
not be used for draining purposes.

2.5.9 Venting

The boiler is fitted with an automatic air vent. Other meas-
ures need to be taken to allow the heating system to be
either automatically or manually vented during filling and
during commissioning.
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Installation and maintenance instructions ecoTEC plus 0020116700_01