5.5 Use of temperature relief valve with obligatory filling
The temperature relief valve (shown below) must be present in the system. The valve must
be installed by a qualified technician in accordance with the instructions given in the manual from the
producer of the valve.
We recommend the CALEFFI 544501 valve depicted below.
5.6 Fitting the boiler to an open central heating system.
The connecting scheme of an open central heating system is depicted on the figure.
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