It is recommended to install a dirt catcher and also an anticondensation valve on the return
line. (3-way mixing valve).
Please not that air-vent is not premounted with the boiler. It should be connected externally.
5.7
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.
6
Return line protection against condensation
Every boiler is sensitive to condensation if the return line water temperature is too low. In order to avoid
it is necessary to mount the mixing valve to this boiler.
15